MAX15029 데이터 시트보기 (PDF) - Maxim Integrated

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MAX15029

1.425V to 3.6V Input, 500mA Low-Dropout Regulators with BIAS Input

Maxim Integrated 

MAX15029/MAX15030

1.425V to 3.6V Input, 500mA Low-Dropout

Regulators with BIAS Input

General Description

The MAX15029/MAX15030 low-dropout linear regulators

operate from input voltages as low as 1.425V and deliver

up to 500mA of continuous output current with a typical

dropout voltage of only 40mV. The output voltage is adjust-

able from 0.5V to VIN and is ±2% accurate over load and

line variations, from -40°C to +125°C. The MAX15030

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 the shutdown.

These regulators use small, 1μF ceramic input capacitors

and 2.2μF ceramic output capacitors to deliver 500mA

output current. High bandwidth provides excellent tran-

sient response and limits the output voltage deviation to

10mV for a 100mA to 500mA load step, with only a 2.2μF

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 (IIN) consumption down to less than

5.5μA in standby mode. Other features include a soft-

start to reduce inrush current, short-circuit protection, and

thermal-overload protection.

The MAX15030 features a BIAS input allowing a

secondary supply to keep the LDO’s internal circuitry

alive if the voltage on IN goes to 0. 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 1A version of these LDOs, refer to the MAX15027/

MAX15028 data sheet.

Typical Operating Circuits

Features

●● 1.425V to 3.6V Input Voltage Range

●● Output Voltage Programmable from 0.5V to VIN

●● Guaranteed Maximum 150mV Dropout for Standard

Package and 190mV Dropout for Side-Wettable

Package at 500mA Output Current

●● 2% Output Accuracy Over Load, Line, and

Temperature

●● Stable with Ceramic Capacitors

●● Fast Transient Response

●● 60μA Operating Bias Supply Current

●● 1.2μA Shutdown Bias Supply Current

●● Short-Circuit and Thermal Protection

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

●● Soft-Start Limits Inrush Current

●● Thermally Enhanced 3mm x 3mm TDFN Package

Applications

●● Automotive (Dead-Man LDO)

●● Servers

●● Storage

●● Networking

●● Base Stations

●● Optical Modules

●● ATE

Ordering Information appears at end of data sheet.

INPUT

1.425V TO 3.6V

1µF

OUT

IN

MAX15029

FB

OUTPUT

0.5V TO VIN

ALWAYS-ON INPUT

3V TO 5.5V

INPUT

1.425V TO 3.6V

1µF

2.2µF

BIAS

OUT

IN

MAX15030

FB

OUTPUT

0.5V TO VIN

2.2µF

EN

SS

GND

EN

SS

GND

19-4586; Rev 5; 9/16

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