TPS7A25125DRVR集成电路（IC）的线性+开关稳压器规格书PDF中文资料

TPS7A25125DRVR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TPS7A25125DRVR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 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.