Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsPMICsPMIC - LDO voltage regulator Positivbe, adjustable uMax 10

General Description

The MAX8516/MAX8517/MAX8518 low-dropout linear

regulators operate from input voltages as low as 1.425V

and are able to deliver up to 1A of continuous output

current with a maximum dropout voltage of only 200mV.

The output voltage can be set from 0.5V to (V

- 0.2V)

and is 1.4% accurate over load and line variations, from

0°C to +85°C.

These regulators use small, 1µF ceramic input capaci-

tors and 4.7µF ceramic output capacitors to deliver 1A

output current. High bandwidth provides excellent tran-

sient response and limits the output voltage deviation to

45mV for a 20mA to 1A load step, with only a 4.7µF

ceramic output capacitor, and the voltage deviations can

be reduced further by increasing the output capacitor.

Designed with an internal p-channel MOSFET pass

transistor, the MAX8516/MAX8517/MAX8518 feature

low 340µA (typ) supply current during dropout condi-

tions. Soft-start reduces inrush current. Other features

include a logic-controlled shutdown mode, short-circuit

protection, and thermal-overload protection.

The MAX8517 features a power-OK (POK) output that

transitions high when the regulator output is within

±10% of its nominal output voltage. The MAX8518

features a 150ms power-on reset output.

The parts are packaged in a 10-pin µMAX

package that

includes an exposed pad for optimal power dissipation.

Applications

Servers

Storage

Networking

Base Stations

Optical Modules

Features

♦ 1.425V to 3.6V Input Voltage Range

♦ Guaranteed 200mV Dropout at 1A Output Current

♦ ±1.4% Output Accuracy Over Load, Line, and

Temperature (0°C to +85°C), ±0.6% Initial Accuracy

♦ Compatible with Ceramic Capacitors

♦ Fast Transient Response

♦ 320µA Operating Supply Current

♦ <25µA Shutdown Supply Current

♦ Short-Circuit Protection

♦ Thermal-Overload Protection

♦ Soft-Start Limits Inrush Current

MAX8516/MAX8517/MAX8518

1.425V to 3.6V Input, 1A,

0.2V Dropout LDO Regulators

________________________________________________________________

Maxim Integrated Products

Ordering Information

19-3188; Rev 2; 9/09

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com

EVALUATION KIT

AVAILABLE

PART TEMP RANGE PIN-PACKAGE

MAX8516EUB -40°C to +85°C 10 µMAX

MAX8517EUB -40°C to +85°C 10 µMAX

MAX8517EUB/V -40°C to +85°C 10 µMAX

MAX8518EUB -40°C to +85°C 10 µMAX

N.C.

OUT

FBN.C.

MAX8516

µMAX

TOP VIEW

GNDN.C.

N.C.

OUT

FBPOK

MAX8517

µMAX

GNDN.C.

N.C.

OUT

FBN.C.

MAX8518

µMAX

GNDPOR

Pin Configurations

MAX8516

MAX8517

MAX8518

1µF

4.7µF

INPUT

1.425V TO 3.6V

OUTPUT

0.5V TO (V

- 0.2V), 1A

POWER-ON RESET

POWER-OK

OFF

IN_

POR (MAX8518)

POK (MAX8517)

EN GND

OUT_

Typical Operating Circuit

Post Regulators

Notebooks

PDAs

ATE

µMAX is a registered trademark of Maxim Integrated Products, Inc.

/V Denotes an automotive qualified part.

Summary of content (10 pages)

PAGE 1
9-3188; Rev 2; 9/09 0µMAX 3m m 1 KIT ATION EVALU E L B A IL AVA 1.425V to 3.6V Input, 1A, 0.2V Dropout LDO Regulators m x 5m Features ♦ 1.425V to 3.6V Input Voltage Range ♦ Guaranteed 200mV Dropout at 1A Output Current ♦ ±1.4% Output Accuracy Over Load, Line, and Temperature (0°C to +85°C), ±0.
PAGE 2
MAX8516/MAX8517/MAX8518 1.425V to 3.6V Input, 1A, 0.2V Dropout LDO Regulators ABSOLUTE MAXIMUM RATINGS IN, EN, POK (MAX8517), POR (MAX8518), FB to GND .........................................................-0.3V to +4.0V OUT to GND ..................................................-0.3V to (IN + 0.3V) Output Short-Circuit Duration.....................................Continuous Continuous Power Dissipation (TA = +70°C, EP soldered to PCB) 10-Pin µMAX (derate 10.3mW/°C above +70°C) .........
PAGE 3
1.425V to 3.6V Input, 1A, 0.2V Dropout LDO Regulators (Circuit of Figure 1. VIN = +1.8V, VOUT = +1.5V, EN = IN, IOUT = 1mA, TA = -40°C to +85°C, unless otherwise noted.) (Note 1) PARAMETER CONDITIONS MIN TYP MAX UNITS 440 450 460 mV mV POR (MAX8518 ONLY) POR Reset Threshold VFB falling, VHYS = 10mV, VIN = 1.425V to 3.6V POR Output Voltage Low VFB = 0.4V or 0.6V, IPOR = 1mA POR Output Current High VPOR = 3.6V POR Rising Delay Time From FB to POR 105 25 200 0.
PAGE 4
Typical Operating Characteristics (continued) (Circuit of Figure 1, VIN = +1.8V, VOUT = +1.5V, IOUT = 1A, COUT = 4.7µF, CIN = 1µF, TA = +25°C.) DROPOUT VOLTAGE vs. LOAD CURRENT GROUND CURRENT vs. LOAD CURRENT 350 325 TA = +25°C TA = -40°C 300 125 275 MAX8516/17/18 toc05 TA = +85°C DROPOUT VOLTAGE (mV) MAX8516/17/18 toc04 375 GROUND CURRENT (µA) 100 75 50 25 250 0 0 200 400 600 800 1000 1200 200 0 400 600 800 LOAD CURRENT (mA) LOAD CURRENT (mA) LINE INPUT TRANSIENT (VIN = +1.
PAGE 5
1.425V to 3.6V Input, 1A, 0.2V Dropout LDO Regulators FB VOLTAGE vs. TEMPERATURE OUTPUT RIPPLE VOLTAGE MAX8516/17/18 toc11 MAX8516/17/18 toc10 502 FB VOLTAGE (mV) 501 VOUT AC-COUPLED 1mV/div 500 499 ILOAD = 10mA 498 -40 -15 10 35 60 85 100µs/div TEMPERATURE (°C) OVERCURRENT THRESHOLD vs. TEMPERATURE SHORT-CIRCUIT CURRENT MAX8516/17/18 toc13 MAX8516/17/18 toc12 1.90 VOUT 1V/div 1.85 IOUT 2A/div 1.80 1.
PAGE 6
1.425V to 3.6V Input, 1A, 0.2V Dropout LDO Regulators MAX8516/MAX8517/MAX8518 Pin Description PIN NAME FUNCTION MAX8516 MAX8517 MAX8518 1 1 1 EN Enable Input. Set low to place the device in low-current shutdown mode. Set high for normal operation. 2, 3 2, 3 2, 3 IN Regulator Input. VIN can range from +1.425V to +3.6V. Bypass with a 1µF or higher ceramic capacitor to GND. 4, 5, 10 5, 10 4, 10 N.C. No Connection. Pin 10 is internally pulled down to GND with a 10kΩ resistor.
PAGE 7
1.425V to 3.6V Input, 1A, 0.2V Dropout LDO Regulators The MAX8516/MAX8517/MAX8518 are low-input, lowdropout, PMOS regulators capable of delivering up to 1A of output current with as little as 200mV of headroom from input to output. The PMOS output stage can be driven from input voltages down to +1.425V without sacrificing stability or transient performance. Since these regulators have a PMOS output device, supply current is not a significant function of load or input headroom.
PAGE 8
MAX8516/MAX8517/MAX8518 1.425V to 3.6V Input, 1A, 0.2V Dropout LDO Regulators Operating Region and Power Dissipation Noise, PSRR, and Transient Response The maximum power dissipation depends on the thermal resistance of the IC package and circuit board, the temperature difference between the die junction and ambient air, and the rate of airflow. The power dissipated in the device is P = IOUT ✕ (VIN - VOUT). The package features an exposed thermal pad on its underside.
PAGE 9
1.425V to 3.6V Input, 1A, 0.2V Dropout LDO Regulators TRANSISTOR COUNT: 2849 PROCESS: BiCMOS For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE DOCUMENT NO.
PAGE 10
MAX8516/MAX8517/MAX8518 1.425V to 3.6V Input, 1A, 0.2V Dropout LDO Regulators Revision History REVISION NUMBER REVISION DATE 0 2/04 Initial release 1 4/04 Removed future product asterisks for MAX8517/MAX8518. Updated Electrical Characteristics and Pin Description. 2 9/09 Added MAX8517 automotive package to Ordering Information. DESCRIPTION PAGES CHANGED — 1–3, 6 1 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product.