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).