TPS79718DCKT屬于集成電路（IC）的線性+開(kāi)關(guān)穩(wěn)壓器。由美國(guó)德州儀器公司制造生產(chǎn)的TPS79718DCKT穩(wěn)壓器 - 線性線性穩(wěn)壓器用于提供穩(wěn)定的輸出電壓，無(wú)論負(fù)載電流、輸入電壓或環(huán)境因素如何變化，這些輸出電壓通常都要保持不變。它們的工作原理要求輸入電壓維持在高于所需的輸出電壓，而且要超出某個(gè)最小量，并且在工作時(shí)會(huì)將輸入端的任何多余電壓轉(zhuǎn)換為熱量。對(duì)于大多數(shù)應(yīng)用而言，雖然這種穩(wěn)壓器的效率低于開(kāi)關(guān)模式的穩(wěn)壓器，但它們通常更適合對(duì)噪聲高度敏感的應(yīng)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pass transistor has been replaced by a PMOS pass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.