TPS797285DCKT集成电路（IC）的线性+开关稳压器规格书PDF中文资料

TPS797285DCKT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TPS797285DCKT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• 50-mA Low-Dropout Regulator

• Ultra-Low 1.2-μA Quiescent Current at 10 mA

• 5-Pin SC70 (DCK) Package

• Integrated Power Good Output

• Stable With Any Capacitor Greater Than 0.47 μF

• Typical Dropout Voltage of 105 mV at 10 mA

(TPS79733)

• Over-Current Limitation

• Operating Junction Temperature Range of –40°C

to 85°C

2 Applications

• Battery-Powered Microcontrollers and

Microprocessors

3 Description

The TPS797xx family of low-dropout voltage

regulators (LDOs) offers the benefits of low-dropout

voltage and ultra-low-power operation. The device is

stable with any capacitor greater than 0.47-μF.

Therefore, implementations of this device require very

little board space due to the miniaturized packaging

and potentially small output capacitor. In addition, the

family includes an integrated open drain active-high

power good (PG) output. Intended for use in

microcontroller-based, battery-powered applications,

the TPS797xx family low dropout and ultra-low-power

operation result in a significant increase in system

battery operating life. The small packaging minimizes

consumption of board space.

The device is enabled when the applied voltage

exceeds the minimum input voltage. The usual PNP

pass transistor has been replaced by a PMOS pass

element. Because the PMOS pass element behaves

as a low-value resistor, the dropout voltage is very

low (typically, 105 mV at 10-mA of load current), and

is directly proportional to the load current. The

quiescent current is ultra-low (1.2-μA, typically) and is

stable over the entire range of output load current

(0 mA to 50 mA). When properly configured with a

pullup resistor, the PG output can implement a

power-on reset or low-battery indicator.