MAX8557ETE+ Maxim Integrated Products, MAX8557ETE+ Datasheet

MAX8557ETE+

Manufacturer Part Number

MAX8557ETE+

Description

IC REG LDO 4A 16-TQFN

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX8556EVKIT.pdf (10 pages)

Specifications of MAX8557ETE+

Regulator Topology

Positive Adjustable

Voltage - Output

0.5 ~ 3.4 V

Voltage - Input

1.43 ~ 3.6 V

Voltage - Dropout (typical)

0.1V @ 4A

Number Of Regulators

Current - Output

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

16-TQFN Exposed Pad

Number Of Outputs

Polarity

Positive

Input Voltage Max

3.6 V

Output Voltage

3.4 V

Output Type

Adjustable

Dropout Voltage (max)

100 mV

Output Current

4 A

Line Regulation

0.15 %/V

Load Regulation

0.1 %/A

Voltage Regulation Accuracy

1 %

Maximum Power Dissipation

2666.7 mW

Maximum Operating Temperature

+ 85 C

Mounting Style

SMD/SMT

Minimum Operating Temperature

- 40 C

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current - Limit (min)

Lead Free Status / Rohs Status

Lead free / RoHS Compliant

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The MAX8556/MAX8557 low-dropout linear regulators

operate from input voltages as low as 1.425V and are

able to deliver up to 4A of continuous output current

with a typical dropout voltage of only 100mV. The out-

put voltage is adjustable from 0.5V to V

Designed with an internal p-channel MOSFET pass tran-

sistor, the MAX8556/MAX8557 maintain a low 800µA typi-

cal supply current, independent of the load current and

dropout voltage. Using a p-channel MOSFET eliminates

the need for an additional external supply or a noisy inter-

nal charge pump. Other features include a logic-con-

trolled shutdown mode, built-in soft-start, short-circuit

protection with foldback current limit, and thermal-over-

load protection. The MAX8556 features a POK output that

transitions high when the regulator output is within ±10%

of its nominal output voltage. The MAX8557 offers a

power-on reset output that transitions high 140ms after the

output has achieved 90% of its nominal output voltage.

The MAX8556/MAX8557 are available in a 16-pin thin

QFN 5mm x 5mm package with exposed paddle.

19-3257; Rev 2; 8/09

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.

1.425V TO 3.6V

Servers and Storage Devices

Networking

Base Stations

Optical Modules

Point-of-Load Supplies

ATE

Typical Operating Circuit

________________________________________________________________ Maxim Integrated Products

General Description

POK

(POR)

(MAX8557)

MAX8556

N.C.

GND

OUT

Applications

0.5V TO V

- 0.2V.

OUT

- 0.2V

4A Ultra-Low-Input-Voltage

o 1.425V to 3.6V Input Voltage Range

o Guaranteed 4A Output Current

o ±1% Output Accuracy Over Load/Line/

o 100mV Dropout at 4A Load (typ)

o Built-In Soft-Start

o 800µA (typ) Operating Supply Current

o 150µA (max) Shutdown Supply Current

o Short-Circuit Current Foldback Protection

o Thermal-Overload Protection

o ±10% Power-OK (MAX8556)

o 140ms Power-On Reset Output (MAX8557)

o Fast Transient Response

o 16-Pin Thin QFN (5mm x 5mm) Package

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

/V Denotes an automotive qualified part.

*EP = Exposed pad.

MAX8556ETE+

M AX 8556E TE /V + - 40°C to + 85°C 16 Thin QFN-EP*

MAX8557ETE+

Temperature

PART

TOP VIEW

GND

N.C.

- 40°C to + 85°C 16 Thin QFN-EP*

LDO Regulators

RANGE

TEMP

Ordering Information

5mm x 5mm

THIN QFN

(MAX8557)

MAX8556

Pin Configuration

PIN-

PACKAGE

Features

OUT

FEATURE

POK

POR

Related parts for MAX8557ETE+

MAX8557ETE+ Summary of contents

Page 1

... Thermal-Overload Protection o ±10% Power-OK (MAX8556) o 140ms Power-On Reset Output (MAX8557) o Fast Transient Response o 16-Pin Thin QFN (5mm x 5mm) Package Applications PART MAX8556ETE 8556E 40° 85°C 16 Thin QFN-EP* MAX8557ETE+ + Denotes a lead(Pb)-free/RoHS-compliant package. /V Denotes an automotive qualified part. *EP = Exposed pad. TOP VIEW V OUT 0. 0.2V ...

Page 2

Ultra-Low-Input-Voltage LDO Regulators ABSOLUTE MAXIMUM RATINGS IN, EN, POK, POR to GND .......................................-0.3V to +4V FB, OUT to GND ..........................................-0. Output Short-Circuit Duration.....................................Continuous Continuous Power Dissipation (T = +70°C) A 16-Pin Thin QFN (derate 33.3mW/°C above +70°C) ...

Page 3

ELECTRICAL CHARACTERISTICS (continued 1.8V 1.5V 2mA OUT OUT PARAMETER POK Output Current, High V POK Delay Time From FB rising to POK high EN Enable Input Threshold V Enable ...

Page 4

Ultra-Low-Input-Voltage LDO Regulators ( +1.8V +1.5V 4A OUT OUT GND CURRENT vs. TEMPERATURE 900 800 700 LOAD 600 500 400 LOAD 300 200 ...

Page 5

V = +1.8V +1.5V OUT OUT PSRR vs. FREQUENCY FREQUENCY (kHz) EXPOSED PADDLE TEMPERATURE vs. AMBIENT TEMPERATURE 100 ...

Page 6

Ultra-Low-Input-Voltage LDO Regulators PIN NAME 1–6 IN LDO Input. Connect to a 1.425V to 3.6V input voltage. Bypass with a 22µF ceramic capacitor to GND. LDO Output. Bypass with 2 x 10µF ceramic capacitors to GND. A smaller capacitance ...

Page 7

Detailed Description The MAX8556/MAX8557 low-dropout linear regulators are capable of delivering from low-input volt- age supplies ranging from 1.425V to 3.6V with only 200mV of dropout (max). The pMOS output stage can be driven from input voltages ...

Page 8

Ultra-Low-Input-Voltage LDO Regulators Applications Information Output Voltage Selection The MAX8556/MAX8557 feature an adjustable output voltage from 0.5V to 3.4V. Set the output voltage using an external resistor-divider from the output to GND with FB connected to the center tap ...

Page 9

Thermal Considerations How much power the package can dissipate strongly depends on the mounting method of the IC to the PCB and the copper area for cooling. Using the JEDEC test standard, the maximum power dissipation allowed in the package ...

Page 10

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products ...

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