MAX15027ATBT データシートの表示（PDF） - Maxim Integrated

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MAX15027ATBT

1.425V to 3.6V Input, 1A Low-Dropout Regulators with BIAS Input

Maxim Integrated 

MAX15027/MAX15028

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

Regulators with BIAS Input

General Description

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 VIN and is ±2% accurate over load and line

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

tures 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 capacitors

and 4.7µF ceramic output capacitors to deliver 1A out-

put current. High bandwidth provides excellent transient

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 (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 MAX15028 features a BIAS input allowing a

secondary 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.

Applications

●● Automotive (Dead-Man LDO)

●● Servers

●● Storage

●● Networking

●● Base Stations

●● Optical Modules

●● ATE

Features

●● 1.425V to 3.6V Input Voltage Range

●● Output Voltage Programmable from 0.5V to VIN

●● Guaranteed Maximum 225mV Dropout at 1A Output

Current

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

Temperature

●● Stable with Ceramic Capacitors

●● Fast Transient Response

●● 60µA Operating Bias Supply Current (MAX15028)

●● 1.2µA Shutdown Bias Supply Current (MAX15028)

●● 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

●● AEC-Q100 Qualified

Ordering Information appears at end of data sheet.

Typical Operating Circuits and Pin Configurations appear

at end of data sheet.

19-4488; Rev 3; 8/16

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