TPS74601PBDRVR集成电路（IC）的线性+开关稳压器规格书PDF中文资料

TPS74601PBDRVR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TPS74601PBDRVR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• Input Voltage Range: 1.5 V to 6.0 V

• Adjustable Output Voltage:

– 0.55 V to 5.5 V

• Very Low Dropout:

– 225 mV (max) at 1 A (3.3 VOUT)

• High Output Accuracy:

– 0.7%, Typical

– 1%, Maximum Over Temperature (85°C)

• Open-Drain Power-Good Output

• Power-Good Rising Delay:

– TPS746: 165 μs

– TPS746B: 5 ms

• IQ: 25 μA (Typical)

• Built-In Soft-Start With Monotonic VOUT Rise

• Package:

– 2-mm × 2-mm 6-Pin WSON (DRV)

• Active Output Discharge

2 Applications

• Set-Top Boxes, Gaming Consoles

• Home Theater and Entertainment

• Desktops, Notebooks, Ultrabooks

• Printers

• Servers

• Thermostat and Lighting Controls

• Electronic Point of Sale (EPOS)

3 Description

The TPS746 is an adjustable 1-A 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 TPS746 features an ultra-low dropout of 225 mV

at 1 A that can help improve the power efficiency of

the system.

The TPS746 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.

Additionally, the TPS746 has a low IQ with enable

functionality to minimize standby power. This device

features an internal soft-start to lower the inrush

current, which provides a controlled voltage to the

load and minimizes the input voltage drop during start

up.

The TPS746 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 sequencing multiple power

sources in the system.

The TPS746 is stable with small ceramic output

capacitors, allowing for a small overall solution size.

A precision band-gap and error amplifier provides a

high accuracy of 0.7% max at 25ºC and 1% max over

temperature (85ºC). This device includes integrated

thermal shutdown, current limit, and undervoltage

lockout (UVLO) features. The TPS746 has an internal

foldback current limit that helps reduce the thermal

dissipation during short-circuit events.