TPS74501PDRVR中文资料德州仪器数据手册PDF规格书

1 Features

1• Input Voltage Range: 1.5 V to 6.0 V

• Adjustable Output Voltage:

– 0.55 V to 5.5 V

• Very Low Dropout:

– 130 mV (max) at 500 mA (3.3 VOUT)

• High Output Accuracy: 0.7% (Typical) and 1%

(Maximum Over Temperature)

• Open-Drain Power-Good Output

• IQ: 25 μA (Typical)

• Built-In Soft-Start With Monotonic VOUT Rise

• Package:

– 2-mm × 2-mm WSON-6 (DRV)

• Active Output Discharge

2 Applications

• Set-Top Boxes, Gaming Consoles

• Home Theater and Entertainment

• Desktops, Notebooks, Ultrabooks

• Printers

• Servers

• Thermostat and Lighting Control

• Electronic Point of Sale (EPOS)

3 Description

The TPS745 is an adjustable 500-mA low-dropout

(LDO) regulator with power-good functionality. This

device is available in a small, 6-pin, 2-mm × 2-mm

WSON package and consumes very low quiescent

current and provides fast line and load transient

performance. The TPS745 features an ultra-low

dropout of 130 mV at 500 mA that can help improve

the power efficiency of the system.

The TPS745 is optimized for a wide variety of

applications by supporting an input voltage range

from 1.5 V to 6.0 V and an externally adjustable

output range of 0.55 V to 5.5 V. The low output

voltage enables this LDO to power the modern

microcontrollers with lower core voltages.

The TPS745 has a power-good (PG) output that

monitors the voltage at the feedback pin to indicate

the status of the output voltage. The EN input and PG

output can be used for the sequencing multiple power

sources in the system.

The TPS745 is stable with small ceramic output

capacitors, allowing for a small overall solution size.

A precision band-gap and error amplifier provides

high accuracy of 0.7% (max) at 25°C and 1% (max)

over temperature (85ºC). This device includes

integrated thermal shutdown, current limit, and

undervoltage lockout (UVLO) features. The TPS745

has an internal foldback current limit that helps

reduce the thermal dissipation during short-circuit

events.