1 Features

• Ultra-low IQ: 2 μA

• Input voltage: 2.4 V to 18 V

• Output voltage options available:

– Fixed: 1.25 V to 5.0 V

– Adjustable: 1.24 V to 17.66 V

• 1% accuracy over temperature

• Low dropout: 340 mV (max) at 300 mA

• Open-drain, power-good output

• Thermal shutdown and overcurrent protection

• Active overshoot pulldown

• Operating junction temperature: –40°C to +125°C

• Stable with 1-μF output capacitors

• Package: 6-pin WSON

2 Applications

• Home and building automation

• Multicell power banks

• Smart grid and metering

• Portable power tools

• Motor drives

• White goods

• Portable appliances

3 Description

The TPS7A25 low-dropout (LDO) linear voltage

regulator introduces a combination of a 2.4-V to 18-V

input voltage range with very-low quiescent current

(IQ). These features help modern appliances meet

increasingly stringent energy requirements, and help

extend battery life in portable-power solutions.

The TPS7A25 is available in both fixed and adjustable

versions. For more flexibility or higher output voltages,

the adjustable version uses feedback resistors to set

the output voltage from 1.24 V to 17.64 V. Both

versions have a 1% output regulation accuracy that

provides precision regulation for most microcontroller

(MCU) references.

The TPS7A25 LDO operates more efficiently than

standard linear regulators because the maximum

dropout voltage is less than 340 mV at 300 mA of

current. This maximum dropout voltage allows for

92.5% efficiency from a 5.4-V input voltage (VIN) to

a 5.0-V output voltage (VOUT).

The power-good (PG) indicator can be used to either

hold an MCU in reset until power is good, or for

sequencing. The PG pin is an open-drain output;

therefore, the pin is easily level-shifted for monitoring

by a rail other than VOUT. The built-in current limit

and thermal shutdown help protect the regulator in the

event of a load short or fault.

For a higher output current alternative, consider the

TPS7A26.