TPS7A19集成电路（IC）的线性+开关稳压器规格书PDF中文资料

TPS7A19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TPS7A19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

1• Wide Input Voltage Range: 4 V to 40 V

• Adjustable Output Voltage: 1.5 V to 18 V

• Output Current: 450 mA

• Low Quiescent Current (IQ): 15 μA

• Low Dropout Voltage: 450 mV (max) at 400 mA

• Power Good with Programmable Delay

• Thermal Shutdown and Overcurrent Protection

• Stable with Ceramic Output Capacitors:

– 10 μF to 500 μF for VOUT ≥ 2.5 V

– 22 μF to 500 μF for VOUT < 2.5 V

• Operating Temperature: –40°C to +125°C

• Package: 3-mm × 3-mm SON-8

2 Applications

• Smart Grid Infrastructure and Metering

• Power Tools

• Motor Drives

• Access Control Systems

• Test and Measurement

3 Description

The TPS7A19 is a low-dropout linear regulator (LDO)

with a wide input voltage (VIN) range up to 40 V,

capable of sourcing high output current (IOUT) up to

450 mA. This voltage regulator is ideal for generating

a low-voltage supply from wide input-voltage rails.

Not only does the TPS7A19 supply a well-regulated

voltage rail, but the device also withstands and

maintains regulation during voltage transients by

acting as a simple surge protection circuit.

The TPS7A19 consumes only 15 μA of quiescent

current (IQ) at light loads, thereby lowering the power

consumption for always-on or battery-powered

applications.

The TPS7A19 features integrated thermal shutdown

and overcurrent protection. The TPS7A19 also offers

a power good output (PG) with a programmable delay

that indicates when the output voltage is in regulation.

This feature is useful for power-rail sequencing

functions.

This LDO is available in a small, 3-mm × 3-mm,

thermally-enhanced, 8-pin SON package.