T494B475K016AS中文资料德州仪器数据手册PDF规格书

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).