MAX15028 Maxim Integrated Products, MAX15028 Datasheet

MAX15028

Manufacturer Part Number

MAX15028

Description

(MAX15027 / MAX15028) 1A Low-Dropout Regulators

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX15028.pdf (10 pages)

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The MAX15027/MAX15028 low-dropout linear regulators

operate from input voltages as low as 1.425V and deliver

up to 1A of continuous output current with a typical

dropout voltage of only 75mV. The output voltage is

adjustable from 0.5V to V

and line variations, from -40°C to +125°C. The MAX15028

features a BIAS input of 3V to 5.5V from an always-on

power supply. The BIAS input current is reduced down to

less than 2µA during shutdown.

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

15mV for a 500mA load step, with only a 4.7µF ceramic

output capacitor, and the voltage deviations can be

reduced further by increasing the output capacitor.

These devices offer a logic-controlled shutdown input

to reduce input current (I

than 5.5µA in standby mode. Other features include a

soft-start to reduce inrush current, short-circuit protec-

tion, and thermal-overload protection.

The MAX15028 features a BIAS input allowing a sec-

ondary supply to keep the LDO’s internal circuitry alive

if the voltage on IN goes to 0V. Both devices are fully

specified from -40°C to +125°C and are available in a

10-pin thermally enhanced TDFN package (3mm x

3mm) that includes an exposed pad for optimal power

dissipation. For a 500mA version of these LDOs, refer

to the MAX15029/MAX15030 data sheet.

19-4488; Rev 0; 3/09

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.

Typical Operating Circuits appear at end of data sheet.

Automotive (Dead-Man LDO)

Servers

Storage

Networking

Base Stations

Optical Modules

ATE

________________________________________________________________ Maxim Integrated Products

General Description

1.425V to 3.6V Input, 1A Low-Dropout

and is ±2% accurate over load

) consumption down to less

Applications

Regulators with BIAS Input

o 1.425V to 3.6V Input Voltage Range

o Output Voltage Programmable from 0.5V to V

o Guaranteed Maximum 225mV Dropout at 1A

o ±2% Output Accuracy Over Load, Line, and

o Stable with Ceramic Capacitors

o Fast Transient Response

o 60µA Operating Bias Supply Current (MAX15028)

o 1.2µA Shutdown Bias Supply Current (MAX15028)

o Short-Circuit and Thermal Protection

o -40°C to +125°C Operating Temperature Range

o Soft-Start Limits Inrush Current

o Thermally Enhanced 3mm x 3mm TDFN Package

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

For tape-and-reel orders, add a “T” after the “+”.

* EP = Exposed pad.

MAX15027ATB+T

MAX15028ATB+T

Pin Configurations continued at end of data sheet.

Output Current

Temperature

TOP VIEW

PART

I.C.

TEMP RANGE

- 40°C to + 125°C 10 TDFN-EP*

Ordering Information

(3mm x 3mm)

Pin Configurations

MAX15027

TDFN

PIN-

PACKAGE

Features

OUT

GND

MARK

+AUD

+AUE

TOP

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