1 Features

• Ultra-low IQ: 2.0 μA

• Input voltage: 2.4 V to 18 V

• Output voltage options available:

– Fixed: 1.25 V to 5.5 V

– Adjustable: 1.24 V to 17.75 V

• 1.25% accuracy over temperature

• Low dropout: 250 mV (max) at 200 mA

• Active overshoot pulldown protection

• Thermal shutdown and overcurrent protection

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

• Stable with 1-μF output capacitors

• Package: 5-pin SOT-23

2 Applications

• Smoke and heat detectors

• Thermostats

• Motion detectors (PIR, uWave, and so forth)

• Cordless power tools

• Appliance battery packs

• Electricity meters

• Water meters

3 Description

The TPS7A24 low-dropout (LDO) linear voltage

regulator supports a 2.4-V to 18-V input voltage range

with ultra-low quiescent current (IQ). These features

help modern appliances meet increasingly stringent

energy requirements and help extend battery life in

portable-power solutions.

The TPS7A24 is available in both fixed and

adjustable versions. The fixed-voltage version

eliminates external resistors and minimizes printed

circuit board (PCB) area. For more flexibility or

higher output voltages, the adjustable version uses

feedback resistors to set the output voltage from

1.24 V to 17.75 V. Both versions have 1.25% output

regulation accuracy that provides precision regulation

for microcontroller (MCU) references.

The TPS7A24 LDO operates more efficiently than

standard linear regulators because the maximum

dropout voltage is less than 250 mV at 200 mA of

current. This maximum dropout voltage allows for

92.8% efficiency from a 3.55-V input voltage (VIN) to a

3.3-V output voltage (VOUT).