Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsPMICsPMIC - LDO voltage regulator Positive, fixed TDFN 6 (3x3)

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General Description

The MAX8530/MAX8531 offer the benefits of low-

dropout voltage and ultra-low power regulation in

subminiaturized UCSP and QFN packages with an inte-

grated microprocessor reset circuit (MAX8530 only).

The devices operate from a 2.5V to 6.5V input and

deliver up to 200mA and 150mA outputs with low

dropout of 100mV (typ) at 100mA. Designed with an

internal P-channel MOSFET pass transistor, the supply

current is kept at a low 130µA (with both LDOs on),

independent of the load current and dropout voltage.

Other features include short-circuit protection and

thermal-shutdown protection.

The MAX8530 provides microprocessor open-drain,

active-low reset output to monitor OUT1, eliminating

external components and adjustments. The MAX8530

asserts a 100ms (min) RESET signal when OUT1 drops

below 87% of the nominal output voltage. The MAX8531

includes a reference bypass pin for low output noise

(40µV

RMS

).

Both devices include a logic-controlled shutdown input

and are available in 6-bump UCSP and 6-pin thin QFN

exposed pad packages.

Applications

Cellular and Cordless Phones

PDAs and Palmtop Computers

Notebook Computers

Digital Cameras

PCMCIA Cards

Wireless LAN Cards

Hand-Held Instruments

Features

♦ Guaranteed 200mA Output Current for OUT1

♦ Guaranteed 150mA Output Current for OUT2

♦ Low 100mV (typ) Dropout at 100mA Load for

both LDOs

♦ Open-Drain, Active-Low 100ms (min) Reset Timer

(MAX8530)

♦ Low 40µV

RMS

Output Noise (MAX8531)

♦ Low 130µA Operating Supply Current

♦ <1µA Shutdown Current

♦ Thermal-Overload and Short-Circuit Protection

♦ Output Current Limit

♦ Tiny Packages Available

1.16 x 1.57 x 0.6mm UCSP (3 x 2 Grid)

3mm x 3mm Thin QFN

MAX8530/MAX8531

Dual Low-Dropout Linear Regulators

with

RESET

or Low-Noise Output in UCSP or QFN

Ordering Information

19-2711; Rev 1; 8/05

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

*xy = Output voltage code (see the Output Voltage Selector

Guide).

**EP = Exposed pad.

+Denotes lead-free package.

EVALUATION KIT

AVAILABLE

Pin Configurations appear at end of data sheet.

Output Voltage Selector Guide appears at end of data sheet.

PART

TEMP

RANGE

OUT_

VOLTAGE

PIN-

PACKAGE

MAX8530E BTxy*- T

- 40° C to + 85° C 1.5V to 3.3V

6 UCS P

M AX 8530E BTxy*+ T

- 40° C to + 85° C 1.5V to 3.3V

6 UCS P

M AX 8530E TTxy*- T

- 40° C to + 85° C 1.5V to 3.3V

6 Thi n QFN- EP**

M AX 8530E TTxy*+ T

- 40° C to + 85° C 1.5V to 3.3V

6 Thi n QFN- EP**

MAX8531E BTxy*- T

- 40° C to + 85° C 1.5V to 3.3V

6 UCS P

M AX 8531E BTxy*+ T

- 40° C to + 85° C 1.5V to 3.3V

6 UCS P

M AX 8531E TTxy*- T

- 40° C to + 85° C 1.5V to 3.3V

6 Thi n QFN- EP

M AX 8531E TTxy*+ T

- 40° C to + 85° C 1.5V to 3.3V

6 Thi n QFN- EP

IN OUT1

2.2μF

C

IN

2.2μF

INPUT

2.5V TO 6.5V

1.5V TO 3.3V

AT 200mA

1.5V TO 3.3V

AT 150mA

1μF

SHDN

OFF

ON

OUT2

GND

RESET

BASEBAND

μP

V

I/O

V

CORE

RESET

MAX8530

Typical Operating Circuit

Summary of content (12 pages)

PAGE 1
9-2711; Rev 1; 8/05 KIT ATION EVALU E L B A IL AVA Dual Low-Dropout Linear Regulators with RESET or Low-Noise Output in UCSP or QFN The MAX8530/MAX8531 offer the benefits of lowdropout voltage and ultra-low power regulation in subminiaturized UCSP and QFN packages with an integrated microprocessor reset circuit (MAX8530 only). The devices operate from a 2.5V to 6.5V input and deliver up to 200mA and 150mA outputs with low dropout of 100mV (typ) at 100mA.
PAGE 2
MAX8530/MAX8531 Dual Low-Dropout Linear Regulators with RESET or Low-Noise Output in UCSP or QFN ABSOLUTE MAXIMUM RATINGS IN, SHDN, RESET, BP to GND .................................-0.3V to +7V OUT1, OUT2 to GND...................................-0.3V to (VIN + 0.3V) Output Short-Circuit Duration ........................................Indefinite Continuous Power Dissipation (TA = +70°C) 6-Bump UCSP (derate 3.9mW/°C above +70°C) ........308mW 6-Lead QFN (derate 24.4mW/°C above +70°C) ........
PAGE 3
Dual Low-Dropout Linear Regulators with RESET or Low-Noise Output in UCSP or QFN (IN = 3.8V, SHDN = IN, CBP = 10nF (MAX8531), TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 84 87 89 % RESET OUTPUT (MAX8530 ONLY) RESET Threshold Percentage of nominal output, OUT1 falling, when RESET falls. VTH RESET Threshold Hysteresis 0.5 RESET Output Voltage Low (Open-Drain, Active Low) VOL % IRESET = 500µA, IN = 3.
PAGE 4
Typical Operating Characteristics (continued) VOUT1 = 3.3V, VOUT2 = 1.5V, load = 80mA (both output voltages), VIN = 3.8V, COUT_ = 2.2µF, CBP = 0.01µF, CIN = 2.2µF, and TA = +25°C, unless otherwise noted. DROPOUT VOLTAGE vs. LOAD CURRENT 150 100 80 IOUT1 = 80mA 60 40 50 20 0 0 MAX8530 toc06 100 0.8 0.6 OUTPUT VOLTAGE (%) 200 1.0 MAX8530 toc05 MAX8530 toc04 120 DROPOUT VOLTAGE (mV) DROPOUT VOLTAGE (mV) OUTPUT VOLTAGE ACCURACY vs. TEMPERATURE LDO DROPOUT VOLTAGE vs. VOUT 250 0.4 0.
PAGE 5
Dual Low-Dropout Linear Regulators with RESET or Low-Noise Output in UCSP or QFN VOUT1 = 3.3V, VOUT2 = 1.5V, load = 80mA (both output voltages), VIN = 3.8V, COUT_ = 2.2µF, CBP = 0.01µF, CIN = 2.2µF, and TA = +25°C, unless otherwise noted. LOAD TRANSIENT LOAD TRANSIENT NEAR DROPOUT (VIN = 3.8V, ILOAD = 1mA TO 80mA) MAX8530 toc13 MAX8530 toc12 20mV/div AC-COUPLED VOUT 20mV/div AC-COUPLED VOUT 50mA/div 50mA/div ILOAD ILOAD 0 0 VIN = VOUT + 0.
PAGE 6
Dual Low-Dropout Linear Regulators with RESET or Low-Noise Output in UCSP or QFN MAX8530/MAX8531 Functional Diagram IN SHUTDOWN AND POWER-ON CONTROL SHDN MOS DRIVER WITH ILIMIT ERROR AMP P OUT1 THERMAL SENSOR 1.25V REF DELAY 87% REF RESET* MAX8530 MAX8531 N GND BP** LDO2 OUT2 * MAX8530 ONLY **MAX8531 ONLY Detailed Description The MAX8530/MAX8531 are low-power, low-dropout, low-quiescent current linear regulators with reset designed primarily for battery-powered applications.
PAGE 7
Dual Low-Dropout Linear Regulators with RESET or Low-Noise Output in UCSP or QFN Operating Region and Power Dissipation The MAX8530/MAX8531s’ maximum power dissipation depends on the thermal resistance of the case and circuit board, the temperature difference between the die junction and ambient air, and the rate of airflow. The power dissipation across the device is P = IOUT (VIN VOUT).
PAGE 8
MAX8530/MAX8531 Dual Low-Dropout Linear Regulators with RESET or Low-Noise Output in UCSP or QFN Applications Information Capacitor Selection and Regulator Stability Use a 2.2µF capacitor on the MAX8530/MAX8531s’ inputs. Larger input capacitor values with lower ESRs provide better supply-noise rejection and line-transient response. To reduce noise and improve load transients, use large-output capacitors, up to 10µF.
PAGE 9
Dual Low-Dropout Linear Regulators with RESET or Low-Noise Output in UCSP or QFN TOP VIEW GND SHDN RESET (BP*) A1 A2 A3 TOP VIEW MAX8530EBT (MAX8531EBT) B1 B2 B3 OUT1 IN OUT2 UCSP *MAX8531 ONLY *MAX8531 ONLY A "+" SIGN WILL REPLACE THE FIRST PIN INDICATOR ON LEAD-FREE PACKAGES. Output Voltage Selector Guide PART VOUT1 VOUT2 TOP MARK MAX8530EBTJ2 2.85 1.8 ACR MAX8530EBTJO 2.85 2.6 ACA MAX8530EBTKG 2.8 3.0 ACT MAX8530ETTP2 2.5 1.8 AET MAX8530ETTO2 2.6 1.
PAGE 10
Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) 6, 8, &10L, DFN THIN.EPS MAX8530/MAX8531 Dual Low-Dropout Linear Regulators with RESET or Low-Noise Output in UCSP or QFN D2 D A2 PIN 1 ID N 0.35x0.35 b PIN 1 INDEX AREA E [(N/2)-1] x e REF. E2 DETAIL A e k A1 CL CL A L L e e PACKAGE OUTLINE, 6,8,10 & 14L, TDFN, EXPOSED PAD, 3x3x0.
PAGE 11
Dual Low-Dropout Linear Regulators with RESET or Low-Noise Output in UCSP or QFN COMMON DIMENSIONS MIN. MAX. D 0.70 2.90 0.80 3.10 E A1 2.90 0.00 3.10 0.05 L k 0.20 0.40 0.25 MIN. A2 0.20 REF. SYMBOL A PACKAGE VARIATIONS PKG. CODE N D2 E2 e JEDEC SPEC b [(N/2)-1] x e DOWNBONDS ALLOWED T633-1 6 1.50±0.10 2.30±0.10 0.95 BSC MO229 / WEEA 0.40±0.05 1.90 REF NO T633-2 6 1.50±0.10 2.30±0.10 0.95 BSC MO229 / WEEA 0.40±0.05 1.90 REF NO T833-1 8 1.50±0.10 2.30±0.10 0.
PAGE 12
Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) 6L, UCSP.EPS MAX8530/MAX8531 Dual Low-Dropout Linear Regulators with RESET or Low-Noise Output in UCSP or QFN PACKAGE OUTLINE, 3x2 UCSP 21-0097 G 1 1 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product.