TPS7A2418DBVR集成电路（IC）的线性+开关稳压器规格书PDF中文资料

TPS7A2418DBVR属于集成电路（IC）的线性+开关稳压器。由德州仪器制造生产的TPS7A2418DBVR稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。

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).