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MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T

Dual-Output, 3-/2-/1-Phase + 2-/1-Phase

Quick-PWM Controllers for VR12/IMVP7

19-5742; Rev 1; 7/11

Ordering Information continued on last page.

+Denotes a lead(Pb)-free/RoHS-compliant package.

*EP = Exposed pad.

Ordering Information

General Description

The MAX17411/MAX17511/MAX17511C/MAX17511N/

MAX17511T are dual-output, step-down, constant on-time

Quick-PWMK controllers for VR12/IMVP-7 CPU core sup-

plies. The controllers consist of two high-current switching

power supplies for CPU and GFX cores. The CPU regulator

(regulator A) is a three-phase constant on-time architecture.

The GFX regulator (regulator B) is also constant on-time

architecture. The MAX17411 supports 2-phase operation

and the MAX17511/MAX17511C/MAX17511N/MAX17511T

support 1-phase operation. The MAX17411/MAX17511/

MAX17511C/MAX17511N/MAX17511T include two internal

drivers on regulator A and one internal driver on regula-

tor B. External drivers such as the MAX17491 enable the

additional phases.

Both regulator A and regulator B include output voltage

sensing and accurate load-line gain. Switching frequen-

cies are programmable from 200kHz to 600kHz per

phase. Output overvoltage protection (OVP, MAX17411/

MAX17511/MAX17511C/MAX17511N), undervoltage pro-

tection (UVP), and thermal protection ensure effective and

reliable operation. When any of these protection features

detect a fault, the controller shuts down both outputs.

The multiphase regulators include transient-phase over-

lap and active overshoot suppression, which speed up

the response time and reduce the total output capaci-

tance. The CPU and GFX outputs are controlled inde-

pendently by writing the appropriate data into a function-

mapped register file. VID code transitions and soft-start

are enabled with a precision slew-rate control circuit. The

SVID interface also allows each regulator to be individu-

ally set into a low-power, single-phase, pulse-skipping

state to optimize efficiency. The MAX17411 is available in

a 48-pin, 6mm x 6mm, TQFN package. The MAX17511/

MAX17511C/MAX17511N/MAX17511T are available in a

40-pin, 5mm O 5mm, TQFN lead-free package.

Applications

VR12/IMVP-7 CPU Core Power Supplies

Notebooks/Desktops/Servers

Features

S Intel VR12/IMVP-7-Compliant Serial Interface

S 3-/2-/1-Phase Quick-PWM CPU Core Regulator

Two Internal Drivers and One External Driver

Transient-Phase Overlap Mode

Dynamic Phase Selection

S 2-/1-Phase Quick-PWM GFX Regulator

One Internal and One External Driver

S Active Overshoot Suppression

S 8-Bit VR12/IMVP-7 DAC

S ±0.5% V

OUT

Accuracy Over Line, Load, and

Temperature

S Active Voltage Positioning with Programmable

Gain

S Accurate Lossless Current Balance

S Accurate Droop and Current Limit

S Remote Output and Ground Sense

S Power-Good Window Comparators (POKA and

POKB)

S 4.5V to 24V Battery-Input Voltage Range

S Programmable 200kHz to 600kHz Switching

Frequency

S External Thermal-Fault Detection Output

(VR_HOT#)

S Overvoltage (MAX17411/MAX17511/MAX17511C/

MAX17511N), Undervoltage, and Thermal-Fault

Protection

S Slew-Rate Controlled Soft-Start

S Passive Soft-Shutdown (20I Discharge Switches)

S Integrated Boost Switches

S Low-Profile, 48-Lead/40-Lead TQFN Packages

Quick PWM is a trademark of Maxim Integrated Products, Inc.

EVALUATION KIT

AVAILABLE

PART TEMP RANGE PIN-PACKAGE FEATURE

MAX17411GTM+ -40NC to +105NC 48 TQFN-EP* 3-/2-/1-Phase + 2-/1-Phase

MAX17511GTL+ -40NC to +105NC 40 TQFN-EP* 3-/2-/1-Phase + 1-Phase

Summary of content (72 pages)

PAGE 1
9-5742; Rev 1; 7/11 TION KIT EVALUA BLE AVAILA Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 Features The MAX17411/MAX17511/MAX17511C/MAX17511N/ MAX17511T are dual-output, step-down, constant on-time Quick-PWMK controllers for VR12/IMVP-7 CPU core supplies. The controllers consist of two high-current switching power supplies for CPU and GFX cores. The CPU regulator (regulator A) is a three-phase constant on-time architecture.
PAGE 2
MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 ABSOLUTE MAXIMUM RATINGS VCC, VDDA, VDDB to GND (AGND)..........................-0.3V to +6V VDIO, CLK, ALERT# to GND (AGND)......................-0.3V to +6V CSPAAVE, CSPBAVE, CSP_, CSN_ to GND (AGND).........................................-0.3V to +6V FBA, FBB to GND (AGND)........................ -0.3V to (VCC + 0.3V) SR, IMAX_ to GND (AGND) ..................... -0.
PAGE 3
Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 (Circuits of Figures 1 and 2. VIN = 10V, VCC = VDDA = VDDB = 5V, EN = VCC, VGNDS_ = 0V, VFB_ = VCSP_AVE = VCSP_ = VCSN_ = 1V; [SerialVID = 1.00, FPWM MODE]; TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25NC. All devices 100% tested at TA = +25NC. Limits over temperature guaranteed by design.
PAGE 4
MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure 1. VIN = 10V, VCC = VDDA = VDDB = 5V, EN = VCC, VGNDS_ = 0V, VFB_ = VCSP_AVE = VCSP_ = VCSN_ = 1V; [SerialVID = 1.00, FPWM MODE]; TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25NC. All devices 100% tested at TA = +25NC. Limits over temperature guaranteed by design.
PAGE 5
Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 (Circuits of Figures 1 and 2. VIN = 10V, VCC = VDDA = VDDB = 5V, EN = VCC, VGNDS_ = 0V, VFB_ = VCSP_AVE = VCSP_ = VCSN_ = 1V; [SerialVID = 1.00, FPWM MODE]; TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25NC. All devices 100% tested at TA = +25NC. Limits over temperature guaranteed by design.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 50.
PAGE 6
MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 ELECTRICAL CHARACTERISTICS (continued) (Circuits of Figures 1 and 2. VIN = 10V, VCC = VDDA = VDDB = 5V, EN = VCC, VGNDS_ = 0V, VFB_ = VCSP_AVE = VCSP_ = VCSN_ = 1V; [SerialVID = 1.00, FPWM MODE]; TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25NC. All devices 100% tested at TA = +25NC. Limits over temperature guaranteed by design.
PAGE 7
Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 (Circuits of Figures 1 and 2. VIN = 10V, VCC = VDDA = VDDB = 5V, EN = VCC, VGNDS_ = 0V, VFB_ = VCSP_AVE = VCSP_ = VCSN_ = 1V; [SerialVID = 1.00, FPWM MODE]; TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25NC. All devices 100% tested at TA = +25NC. Limits over temperature guaranteed by design.
PAGE 8
MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 ELECTRICAL CHARACTERISTICS (continued) (Circuits of Figures 1 and 2. VIN = 10V, VCC = VDDA = VDDB = 5V, EN = VCC, VGNDS_ = 0V, VFB_ = VCSP_AVE = VCSP_ = VCSN_ = 1V; [SerialVID = 1.00, FPWM MODE]; TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25NC. All devices 100% tested at TA = +25NC. Limits over temperature guaranteed by design.
PAGE 9
Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 (Circuits of Figures 1 and 2. VIN = 10V, VCC = VDDA = VDDB = 5V, EN = VCC, VGNDS_ = 0V, VFB_ = VCSP_AVE = VCSP_ = VCSN_ = 1V; [SerialVID = 1.00, FPWM MODE]; TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25NC. All devices 100% tested at TA = +25NC. Limits over temperature guaranteed by design.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX High state (pullup) 0.9 2.5 Low state (pulldown) 0.7 2.
PAGE 10
MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 ELECTRICAL CHARACTERISTICS (continued) (Circuits of Figures 1 and 2. VIN = 10V, VCC = VDDA = VDDB = 5V, EN = VCC, VGNDS_ = 0V, VFB_ = VCSP_AVE = VCSP_ = VCSN_ = 1V; [SerialVID = 1.00, FPWM MODE]; TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25NC. All devices 100% tested at TA = +25NC. Limits over temperature guaranteed by design.
PAGE 11
Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 (Circuits of Figures 1 and 2. VIN = 10V, VCC = VDDA = VDDB = 5V, EN = VCC, VGNDS_ = 0V, VFB_ = VCSP_AVE = VCSP_ = VCSN_ = 1V; [SerialVID = 1.00, FPWM MODE]; TA = -40°C to +105°C, unless otherwise noted. Specifications to -40NC and +105NC are guaranteed by design, not production tested.
PAGE 12
MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 ELECTRICAL CHARACTERISTICS (continued) (Circuits of Figures 1 and 2. VIN = 10V, VCC = VDDA = VDDB = 5V, EN = VCC, VGNDS_ = 0V, VFB_ = VCSP_AVE = VCSP_ = VCSN_ = 1V; [SerialVID = 1.00, FPWM MODE]; TA = -40°C to +105°C, unless otherwise noted. Specifications to -40NC and +105NC are guaranteed by design, not production tested.
PAGE 13
Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 (Circuits of Figures 1 and 2. VIN = 10V, VCC = VDDA = VDDB = 5V, EN = VCC, VGNDS_ = 0V, VFB_ = VCSP_AVE = VCSP_ = VCSN_ = 1V; [SerialVID = 1.00, FPWM MODE]; TA = -40°C to +105°C, unless otherwise noted. Specifications to -40NC and +105NC are guaranteed by design, not production tested.
PAGE 14
MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 ELECTRICAL CHARACTERISTICS (continued) (Circuits of Figures 1 and 2. VIN = 10V, VCC = VDDA = VDDB = 5V, EN = VCC, VGNDS_ = 0V, VFB_ = VCSP_AVE = VCSP_ = VCSN_ = 1V; [SerialVID = 1.00, FPWM MODE]; TA = -40°C to +105°C, unless otherwise noted. Specifications to -40NC and +105NC are guaranteed by design, not production tested.
PAGE 15
Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 (Circuits of Figures 1 and 2. VIN = 10V, VCC = VDDA = VDDB = 5V, EN = VCC, VGNDS_ = 0V, VFB_ = VCSP_AVE = VCSP_ = VCSN_ = 1V; [SerialVID = 1.00, FPWM MODE]; TA = -40°C to +105°C, unless otherwise noted. Specifications to -40NC and +105NC are guaranteed by design, not production tested.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS IMAX_ LOGIC 13.
PAGE 16
MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 ELECTRICAL CHARACTERISTICS (continued) (Circuits of Figures 1 and 2. VIN = 10V, VCC = VDDA = VDDB = 5V, EN = VCC, VGNDS_ = 0V, VFB_ = VCSP_AVE = VCSP_ = VCSN_ = 1V; [SerialVID = 1.00, FPWM MODE]; TA = -40°C to +105°C, unless otherwise noted. Specifications to -40NC and +105NC are guaranteed by design, not production tested.
PAGE 17
Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 50 40 12V 40 20V 1 100 10 0.1 0.800 100 10 0 LOAD CURRENT (A) LOAD CURRENT (A) REG A OUTPUT VOLTAGE vs. LOAD CURRENT IN PS1 AND PS2 STATES (SVID = 0.65V) REG B EFFICIENCY vs. LOAD CURRENT IN PS0 STATE (SVID = 1.25V) (MAX17511/C/N/T ONLY) REG B EFFICIENCY vs. LOAD CURRENT IN PS1 AND PS2 STATES (SVID = 0.65V) (MAX17511/C/N/T ONLY) 80 EFFICIENCY (%) PS2 STATE PS1 STATE 0.
PAGE 18
Typical Operating Characteristics (continued) (TA = +25NC, unless otherwise noted.) REG B SWITCHING FREQUENCY vs. LOAD CURRENT (SVID = 0.65V) (MAX17511/C/N/T ONLY) REG A SWITCHING FREQUENCY vs. LOAD CURRENT (SVID = 0.
PAGE 19
Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 36 35 34 33 32 31 30 29 28 27 26 25 23 CLK SR 38 LXA1 DHA1 DLA1 VDDA DLA2 DHA2 BSTA2 LXA2 30 29 28 27 26 25 24 23 22 21 24 POKA DRVPWMA 37 IMAXA IMAXB TOP VIEW BSTA1 LXA1 DHA1 DLA1 VDDA PGNDA DLA2 DHA2 LXA2 IMAXA BSTA2 IMAXB TOP VIEW 20 BSTA1 DRVPWMA 31 19 POKA SR 32 THERMA 39 22 ALERT# THERMA 33 18 CLK THERMB 40 21 VDIO THERMB 34 17 ALERT# CSPAAVE 41 20 AGND CSPAAVE 35 CSPA1 42 19 VDDB
PAGE 20
MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 Pin Description (continued) PIN MAX17411 2 3 MAX17511/ MAX17511C/ MAX17511N/ MAX17511T 3 4 NAME FUNCTION GNDSA Ground Remote-Sense Input for Regulator A. Connect GNDSA to the ground-sense pin of the CPU located directly at the point of load.
PAGE 21
Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 PIN MAX17411 6 7 8 9 10 MAX17511/ MAX17511C/ MAX17511N/ MAX17511T 6 7 — 8 9 NAME FUNCTION FBB Feedback Remote-Sense Input and Voltage Positioning Transconductance (VPS) Amplifier Output for Regulator B. Connect a resistor (RFBB) between FBB and the positive side of the feedback remote sense to set the DC steady-state droop based on the voltage-positioning gain requirement.
PAGE 22
MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 Pin Description (continued) PIN MAX17411 11 MAX17511/ MAX17511C/ MAX17511N/ MAX17511T — NAME FUNCTION CSPB2 Positive Current-Sense Input for Second Phase of Regulator B. Connect CSPB2 to the positive side of the current-sense element of the second phase of regulator B as shown in Figure 8.
PAGE 23
Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 PIN MAX17411 MAX17511/ MAX17511C/ MAX17511N/ MAX17511T NAME FUNCTION 24 19 POKA Open-Drain Power-Good Output for Regulator A. During soft-start and shutdown, POKA stays low. At the end of soft-start, approximately 20Fs (typ) after FBA reaches the output voltage set by the VID code, POKA becomes high-impedance and remains high-impedance as long as FBA is in regulation.
PAGE 24
MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 Pin Description (continued) PIN MAX17411 MAX17511/ MAX17511C/ MAX17511N/ MAX17511T 34 28 NAME FUNCTION BSTA2 Boost Flying Capacitor Connection for High-Side Gate Voltage for the Second Phase of Regulator A. Connect a ceramic capacitor between BSTA2 and LXA2. See the Boost Capacitors section.
PAGE 25
Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 PIN MAX17411 42 43 44 MAX17511/ MAX17511C/ MAX17511N/ MAX17511T 36 37 38 NAME FUNCTION CSPA1 Positive Current-Sense Input for the First Phase of Regulator A. Connect CSPA1 to the positive side of the current-sense resistor or the DCR sense filter capacitor of regulator A as shown in Figure 8.
PAGE 26
MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 10I 5V BIAS 2.2µF 46 VDDA VCC VDDB 2.2µF TONA VIN OPTIONAL DHA CIN 1µF BSTA1 5 LXA3 SENSE OUTPUTA 8 NH3 1 PGNDA 7 DL3 DLA1 BST 0.
PAGE 27
Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 40 VDDA VCC VDDB 2.2µF DHA1 BSTA1 VIN OPTIONAL CIN LXA1 1µF DLA1 5 OUTPUTA 8 NH3 1 LXA3 SENSE LA3 BST CSPA1 7 DL3 4 NL3 3 MAX17491 LX DL SKIP GND PWM 22 20 0.1µF NH1 0I 23 6 2 31 DL1 VIN RTON 2 CSPAAVE CSPA3 CSPA2 TON DHA2 VTT BIAS SUPPLY 3.3V BSTA2 10kI 75I 5 VR_HOT# 19 VRA_READY 10 VRB_READY 1 VR_ENABLE 16 SVID INPUTS 1.
PAGE 28
MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 RVCC 10I 5V BIAS CVDDA 2.2µF 24 VCC 40 CVCC 1.0µF 39 VCC 1 VR_ENABLE 16 18 SVID INPUTS (1.05V LOGIC) VDDB VCC TON 31 CONNECT CSPA3 TO VCC TO DISABLE REGA PHASE 3 VDDA 17 DRVPWMA DHA1 CSPA3 BSTA1 EN VDIO LXA1 CLK DLA1 CSPA1 CSPAAVE 3.
PAGE 29
Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 COMPONENT REF QTY VR12/IMVP-7 ATOM CPU, TDC = 3.3A/ ICCMAX = 6A 410kHz OPERATION (Figure 3) Conditions — — VIN = 7V to 20V, SVID = 1.1V VIN = 7V to 20V, SVID = 1.05V VIN = 7V to 20V, SVID = 0.
PAGE 30
MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 Table 1. Regulator A Typical Component Values (refer to the MAX17411/MAX17511 Evaluation Kit) (continued) COMPONENT THERMA Setting REF RTHERMA, RNTC QTY — VR12/IMVP-7 ATOM CPU, TDC = 3.
PAGE 31
Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 COMPONENT REF QTY VR12/IMVP-7 GT; TDC = 1.4A/ICCMAX = 2.5A; 500kHz OPERATION (MAX17511/MAX17511C/ MAX17511N/MAX17511T) (Figure 3) VR12/IMVP-7 GT; TDC = 21.5A; ICCMAX = 33A; 400kHz OPERATION (MAX17511/MAX17511C/ MAX17511N/MAX17511T) (Figure 2) VR12/IMVP-7 GT TDC = 40A/ICCMAX = 66A 370kHz OPERATION (MAX17411) (Figure 1) 3 × 470µF, 2V, 4.5mW low-ESR polymer capacitor (D case) Panasonic EEFSX0D471E4 or NEC/TOKIN PSGV0E477M4.
PAGE 32
MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 ANALOG BLOCKS DRVPWMA EN POKA PHASE 2 DACS AND SETVID CIRCUITS A STATUS A REG A 3-PHASE CONSTANT ON-TIME CONTROLLER PHASE 1 MAX17411 MAX17511 MAX17511C MAX17511N MAX17511T FBA CSPA_ CURRENT MONITOR A DIGITAL BLOCKS REGISTER FILE A ALERT# CLK SVID INTERFACE VDIO REGISTER FILE B COMMONBIAS CIRCUITRY MUX 3-BIT ADC THERM AMPA THERMA THERM AMPB THERMB CURRENT MONITOR B
PAGE 33
Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 ILIMA DRVPWMA PHASE-3 CONTROL Q CSPA3 CSNA TRIG Gm(CCI2) PHASE#3 ONE-SHOT ON-TIME CSPA3 CSPA1 TON ILIMA CSNA TRIG3 4-BIT DAC Gm(CCI) CSNA BSTA2 CSPA2 DHA2 CSNA CSNA ILIMA DLA2 PGND MAX17411 MAX17511 MAX17511C MAX17511N MAX17511T CSPA1 TRIG2 Q CSNA TRIG PHASE#2 ONE-SHOT ON-TIME 3-PHASE MINIMUM OFF-TIME VCC Q REF (2.
PAGE 34
MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 CSPB2 CSNB DRVPWMB PHASE-2 CONTROL ILIMB Q CSPB1 MAX17411 TRIG 2-PHASE PHASE#2 ONE-SHOT CSNB ILIMB CSPB1 ON-TIME TONB MINIMUM OFF-TIME TRIG2 Q VCC CSNB Gm(CCI) TRIG2 TRIG CSPB2 ONE-SHOT REF (2.
PAGE 35
Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 MINIMUM OFF-TIME CSNB ILIMB Q TRIG ILIMB ONE-SHOT VCC REF (2.
PAGE 36
MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 Detailed Description The MAX17411/MAX17511/MAX17511C/MAX17511N/ MAX17511T are dual-output, step-down, constant ontime controllers for VR12/IMVP-7 CPU core supplies. The controllers consist of two high-current SMPSs for the CPU and GFX cores. The CPU regulator (regulator A, ADDR0) is a three-phase constant on-time architecture.
PAGE 37
Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 +5V Bias Supply (VCC, VDDA, and VDDB) The Quick-PWM controllers require an external 5V bias supply in addition to the battery. Typically, this +5V bias supply is the notebook’s 95% efficient 5V system supply. The +5V bias supply must provide VCC (PWM controller) and VDDA and VDDB (gate-drive power). VDDA and VDDB can be shorted together on the PCB.
PAGE 38
MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 So: t SW(MIN) = where VDIS is the sum of the parasitic voltage drops in the inductor discharge and charge paths, including MOSFET, inductor, and PCB resistances; VCHG is the sum of the parasitic voltage drops in the inductor charge path, including high-side switch, inductor, and PCB resistances, and tON is the on-time as determined above.
PAGE 39
Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7  R2  R CS =   R DCR  R1 + R2  and: R DCR = L C EQ 1 1 R1 + R2    where RCS is the required current-sense resistance, and RDCR is the inductor’s series DC resistance. Use the typical inductance and RDCR values provided by the inductor manufacturer.
PAGE 40
MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 Gm(FB_) output current IFB_. IFB_ is determined by the sum of the current-sense voltages: IFB_ = G m(FB)_ × VCSX where VCSX = VCSP_AVE - VCSN_ or VCSX = VCSPB1 VCSNB (for regulator B of the MAX17511/MAX17511C/ MAX17511N/MAX17511T) is the differential currentsense voltage, and Gm(FB_) is 600Fs (typ) as defined in the Electrical Characteristics table.
PAGE 41
Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 Integrator Amplifier Regulators A and B utilize internal integrator amplifiers that force the DC average of the FB_ voltage to equal the target voltage, allowing accurate DC output voltage regulation regardless of the output voltage. The MAX17411/ MAX17511/MAX17511C/MAX17511N/MAX17511T disable the integrators by connecting the amplifier inputs together at the beginning of all VID transitions done in pulse-skipping mode (PS2, PS3).
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MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 Table 3. VR12/IMVP-7 8-Bit DAC Code SVID[7:0] (continued) LINE VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0 HEX1 HEX0 11 0 0 0 0 1 0 1 1 0 12 0 0 0 0 1 1 0 0 13 0 0 0 0 1 1 0 14 0 0 0 0 1 1 1 15 0 0 0 0 1 1 16 0 0 0 1 0 17 0 0 0 1 18 0 0 0 19 0 0 0 20 0 0 21 0 22 23 DAC SET POINT VOLTAGE (V) ACCURACY B 0.
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Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 LINE VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0 HEX1 HEX0 52 0 0 1 1 0 1 0 0 3 53 0 0 1 1 0 1 0 1 54 0 0 1 1 0 1 1 55 0 0 1 1 0 1 1 56 0 0 1 1 1 0 57 0 0 1 1 1 58 0 0 1 1 59 0 0 1 60 0 0 1 61 0 0 62 0 63 64 DAC SET POINT VOLTAGE (V) ACCURACY 4 0.5050 ±8mV 3 5 0.5100 ±8mV 0 3 6 0.5150 ±8mV 1 3 7 0.5200 ±8mV 0 0 3 8 0.
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MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 Table 3.
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Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 LINE VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0 HEX1 HEX0 134 1 0 0 0 0 1 1 0 8 135 1 0 0 0 0 1 1 1 136 1 0 0 0 1 0 0 137 1 0 0 0 1 0 0 138 1 0 0 0 1 0 139 1 0 0 0 1 140 1 0 0 0 141 1 0 0 142 1 0 0 143 1 0 144 1 145 146 DAC SET POINT VOLTAGE (V) ACCURACY 6 0.9150 ±5mV 8 7 0.9200 ±5mV 0 8 8 0.9250 ±5mV 1 8 9 0.9300 ±5mV 1 0 8 A 0.
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MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 Table 3.
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Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 LINE VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0 HEX1 HEX0 216 1 1 0 1 1 0 0 0 D 217 1 1 0 1 1 0 0 1 218 1 1 0 1 1 0 1 219 1 1 0 1 1 0 1 220 1 1 0 1 1 1 221 1 1 0 1 1 222 1 1 0 1 223 1 1 0 224 1 1 1 225 1 1 226 1 227 228 DAC SET POINT VOLTAGE (V) ACCURACY 8 1.3250 ±0.5% D 9 1.3300 ±0.5% 0 D A 1.3350 ±0.5% 1 D B 1.3400 ±0.5% 0 0 D C 1.
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MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 Output Voltage Transient Timing waveforms to constantly be the complement of the high-side gate-drive waveforms. This keeps the switching frequency constant and allows the inductor current to reverse under light loads, providing fast, accurate negative output voltage transitions by quickly discharging the output capacitors.
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Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 INDUCTOR CURRENT ∆t = VIN - VOUT L IPEAK t TRAN(START) = ILOAD = IPEAK/2 VBOOT (dVTARGET /dt) where dVTARGET/dt is the slew rate. 0 ON-TIME TIME Figure 10. Pulse Skipping/Discontinuous Crossover Point inductor current across the low-side MOSFETs. Once VLX_ drops below the zero-crossing comparator threshold (see the Electrical Characteristics table), the comparator forces DL_ low.
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MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 VCC SETVID COMMAND EN IGNORE SVID VID (D0–D7) = 0V IGNORE SVID SET SLEW RATE PASSIVE SHUTDOWN VCORE INTERNAL PWM CONTROL POKA tBLANK tBLANK 20µs Figure 11. Startup Sequence for Zero VBOOT VCC SETVID COMMAND EN VID (D0–D7) = BOOT VID IGNORE SVID IGNORE SVID SOFT-START (2.
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Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 When EN goes low, the MAX17411/MAX17511 MAX17511C/ MAX17511N/MAX17511T enter low-power shutdown mode. POK_ is pulled low immediately, and the output voltage ramps down through an internal 20I discharge resistor.
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MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 tor and sets the fault latch. DL_ and DH_ are forced low, and DRVPWM goes to the three-state output defined in the Electrical Characteristics table. Toggle EN or cycle the VCC power supply below 0.5V to clear the fault latch and reactivate the controller.
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Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 REGISTERED FILE A MAX17411 MAX17511 MAX17511C MAX17511N MAX17511T DATA 8 DATA-ACQUISITION SYSTEM ADDR 2 LATCH ENABLE VR_HOT# STATE MACHINE THERMA 3 3-BIT DAC THERMB 2 TO 1 MUX Figure 14. Data-Acquisition System Block Diagram External Drivers and Disabling Phases The MMAX17411/MAX17511/MAX17511C/MAX17511N/ MAX17511T support an external driver, MAX17491, for three-phase operation in regulator A.
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MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 VENDOR DATA 00h TO 06h REGISTER FILE B SAME CHARACTERISTICS AS REGISTER FILE A REGISTER FILE A REGISTER 00h REGISTER 06h SVID INTERFACE VDD LEVEL-SHIFT STAGE ALERT# REGULATOR STATUS AND MONITORING DATA 10h TO 1Ch ALERT# VDIN VDOUT VCLK TMONA REGISTER 1Ch VDIO CLK FROM REGULATOR LOGIC STATUS REGISTER 10h DATA SVID LOGIC VID MAX REGISTER 30h (2 x 34h) ADDRESS LATCH ENAB
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Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 MAX17511T reset the ALERT# line after the ACK and start moving the output voltage to the new target. For the case of back-to-back SetVID commands to the same voltage, the VR asserts ALERT# immediately since there is no settling time. Table 4.
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MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 SetVID_Slow (02h) The SetVID_Slow command contains the target SVID in the payload byte. The output voltage range is defined in Table 3. The MAX17411/MAX17511/MAX17511C/ MAX17511N/MAX17511T drive the respective output voltage to the new VID setting with a slow slew rate as defined in the SR_Slow register (25h). SetVID_Slow transitions occur at 1/4 the fast slew rate.
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Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 Access definitions for these registers are as follows: • RO = Read only. • RW = Read write. • R-M = Read by SVID bus master (CPU). • W-PWM = Written by the MAX17411/MAX17511/ MAX17511C/MAX17511N/MAX17511T only. • HC = Hard coded into the MAX17411/MAX17511/ MAX17511C/MAX17511N/MAX17511T. • Platform = Programmed at PCB assembly using pin strapping—cannot be overwritten by master.
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MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 Table 5. Data and Configuration Register File Definition (continued) INDEX REGISTER NAME DESCRIPTION ACCESS DEFAULT 12h Temperature Zone Data register containing the measurement data from the THERM_ input.
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Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 INDEX REGISTER NAME ACCESS DEFAULT 27h VR tolerance Not supported DESCRIPTION — N/A 28h Current Offset Not supported — N/A 29h Temperature Offset Not supported — N/A 2Ah–2Fh Not Used — — — RW Master FBh (1.5V) 30h VOUT_MAX This register is programmable by the master and sets the maximum VID the MAX17411/ MAX17511/ MAX17511C/ MAX17511N/MAX17511T support.
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MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 Status1 Register (10h) The data in the Status1 register answers the following questions: Is the output voltage in regulation? Is the regulator temperature approaching the thermal limit? Is the regulator’s output current approaching current limit? Also, should the SVID bus master check the MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T for SVID data errors in the Status2 register? Wh
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Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 Temp Max (22h) This register contains the maximum temperature the VR supports prior to issuing a thermal alert or VR_HOT#. Temp MAX is set to +100NC. The single-temperature threshold applies to both regulators A and B. The data in this register is in 8-bit binary format in degrees C, e.g., 64h = +100NC. Platform Performance Registers These registers are programmed on the platform PCB during manufacturing.
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MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 Table 6. Current-Limit Setting (VSR = 0V or VSR = 1.5V) (continued) IMAX_ LEVEL NO. VOLTAGE LEVEL (V) RSENSE (mI) REG A MINMUM VSENSE (mV) REG A PHASE OCP CURRENT (A) REG A PHASE ICC_MAX REPORT (A) REG B MiINIMUM VSENSE (mV) REG B PHASE OCP CURRENT (A) REG B PHASE ICC_MAX REPORT (A) 12 25.5 O VCC/50 0.85 20.0 26 22 15.0 20 17 13 26.5 O VCC/50 0.95 33.
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Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 B7 B6 B5 B4 B3 B2 B1 B0 PS7 PS6 PS5 PS4 PS3 PS2 PS1 PS0 Offset Register (33h) This register contains an offset, which is added to the programmed SVID data. The format of this data is the number of SVID steps/LSBs. For negative offsets, the value is the two’s complement of the number of SVID steps.
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MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 After exiting a low-power state, the CPU waits 3.3Fs prior to entering the full-power mode. Regulators A and B respond identically to the PS_ commands described in Table 8. Regulator B controls phase 1 (MAX17411/ MAX17511/MAX17511C/MAX17511N/MAX17511T) and phase 2 (MAX17411).
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Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 Inductor Operation Point: This choice provides tradeoffs between size vs. efficiency and transient responses vs. output noise. Low inductor values provide better transient response and smaller physical size, but also result in lower efficiency and higher output noise due to increased ripple current.
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MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 resistance between the output capacitors and sense resistors. For a standard 300kHz application, the ESR zero frequency must be well below 95kHz, preferably below 50kHz. Tantalum, SANYO POSCAP, and Panasonic SP capacitors are widely used and have typical ESR zero frequencies below 50kHz. In the standard application circuit, the ESR needed to support a 30mVP-P ripple is 30mV/(40A x 0.
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Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 High-Side MOSFET Power Dissipation The conduction loss in the high-side MOSFET (NH) is a function of the duty factor, with the worst-case power dissipation occurring at the minimum input voltage: 2  V  I PD (NH Resistive) =  OUT  LOAD  R DS(ON)  VIN  N TOTAL  where NTOTAL is the total number of phases.
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MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 Current Limit (IMAX) The MAX17411/MAX17511/MAX17511C/MAX17511N/ MAX17511T have a current limit that is programmed in discrete increments using multivalue logic inputs, IMAX_ and SR. The regulator’s maximum current limit, which is the current limit per phase times the maximum number of active phases, is reflected in the ICC_MAX register (21h) for the respective regulator.
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Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 • Keep the high-current paths short, especially at the ground terminals. This is essential for stable, jitterfree operation. • Connect all analog grounds to a separate solid copper plane, which connects to the ground pin of the Quick-PWM controller. This includes the VCC bypass capacitor, FB_, and GNDS bypass capacitors. • Keep the power traces and load connections short. This is essential for high efficiency.
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MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 Layout Procedure (continued) COMPONENT DESCRIPTION Catch Resistors Catch resistors should be placed near the CPU so that the output voltage trace does not need to route back to the IC. But the GND catch resistor is less critical as it only requires a via to connect to the GND plane.
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Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 PART TEMP RANGE PIN-PACKAGE FEATURE MAX17511CGTL+ -40NC to +105NC 40 TQFN-EP* 3-/2-/1-Phase + 1-Phase, 0V VBOOT for Reg A, 0.9V VBOOT for Reg B MAX17511NGTL+ -40NC to +105NC 40 TQFN-EP* 3-/2-/1-Phase + 1-Phase, 1.1V VBOOT MAX17511TGTL+ -40NC to +105NC 40 TQFN-EP* 3-/2-/1-Phase + 1-Phase, OVP Disabled +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad.
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MAX17411/MAX17511/MAX17511C/MAX17511N/MAX17511T Dual-Output, 3-/2-/1-Phase + 2-/1-Phase Quick-PWM Controllers for VR12/IMVP7 Revision History REVISION NUMBER REVISION DATE 0 1/11 1 7/11 DESCRIPTION Initial release PAGES CHANGED — Added the MAX17511C to the data sheet; updated the Absolute Maximum Ratings to include Package Thermal Characteristics; changed the conditions in the Electrical Characteristics for the Valley Current-Limit Threshold Voltage sections.