TPS76333DBVTG4屬于集成電路（IC）的線(xiàn)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TPS76333DBVTG4穩(wěn)壓器 - 線(xiàn)性線(xiàn)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? 150-mA, low-dropout regulator

? Output voltage: 5 V, 3.8 V, 3.3 V, 3 V, 2.8 V,

2.7 V, 2.5 V, 1.8 V, 1.6 V, and variable

? Dropout voltage, typically 300 mV at 150 mA

? Thermal protection

? Overcurrent limitation

? Less than 2-μA quiescent current in shutdown

mode

? –40°C to 125°C operating junction temperature

range

? 5-pin SOT-23 (DBV) package

2 Applications

? Electricity meters

? Solar inverters

? HVAC systems

? Servo drives and motion control

? Sensor transmitters

3 Description

The TPS763xx family of low-dropout (LDO) voltage

regulators offers the benefits of low-dropout voltage,

low-power operation, and miniaturized packaging.

These regulators feature low dropout voltages and

quiescent currents compared to conventional LDO

regulators. Offered in a 5-pin, small outline

integrated-circuit SOT-23 package, the TPS763xx

series devices are ideal for cost-sensitive designs

and for applications where board space is at a

premium.

A combination of new circuit design and process

innovation has enabled the usual pnp pass transistor

to be replaced by a PMOS pass element. Because

the PMOS pass element behaves as a low-value

resistor, the dropout voltage is low—typically 300 mV

at 150 mA of load current (TPS76333)—and is

directly proportional to the load current. Because the

PMOS pass element is a voltage-driven device, the

quiescent current is low (140 μA maximum) and is

stable over the entire range of output load current

(0 mA to 150 mA). Intended for use in portable

systems such as laptops and cellular phones, the

low-dropout voltage feature and low-power operation

result in a significant increase in system battery

operating life.

The TPS763xx also features a logic-enabled sleep

mode to shut down the regulator, reducing quiescent

current to 1 μA maximum at TJ = 25°C.The

TPS763xx is offered in 1.6-V ,1.8-V, 2.5-V, 2.7-V,

2.8-V, 3-V, 3.3-V, 3.8-V, and 5-V fixed-voltage

versions and in a variable version (programmable

over the range of 1.5 V to 6.5 V).