TPS78508BQWDRBRQ1中文资料德州仪器数据手册PDF规格书

1 Features

• AEC-Q100 qualified for automotive applications:

– Temperature grade 1: –40°C to +125°C, TA

• Device junction temperature: –40°C to +150°C, TJ

• Input voltage range: 1.7 V to 6.0 V

• Available output voltages:

– Adjustable option: 1.2 V to 5.5 V

– Fixed options: 0.65 V to 5.0 V

• Output accuracy: 0.5 typical, 1.7 maximum

• Low IQ: 25 μA (typical)

• Ultra-low dropout:

– 315 mV (max) at 1 A (3.3 VOUT)

• Internal 550 μs soft-start time to reduce inrush

current

• Active output discharge

• Packages:

– 3-mm × 3-mm wettable flank VSON (8)

– 5-pin TO-252, RθJA = 31.6°C/W

2 Applications

• Automotive head units

• Hybrid instrument clusters

• Telematics control units

• Medium- and short-range radar

• DC/DC converters

3 Description

The TPS785-Q1 ultra low-dropout regulator (LDO) is

a small, low quiescent current LDO that can source

1 A with excellent line and load transient performance.

The low output noise and great PSRR performance

make the device suitable to power-sensitive analog

loads. The TPS785-Q1 is a flexible device for post

regulation because this device supports an input

voltage range from 1.7 V to 6.0 V and offers an

adjustable output range of 1.2 V to 5.5 V. The device

also features fixed output voltages from 0.65 V to

5.0 V for powering common voltage rails.

The TPS785-Q1 offers foldback current limit to reduce

power dissipation during a over current condition. The

EN input helps with power sequencing requirements

of the system. The internal soft-start provides a

controlled start up reducing the inrush current allowing

for lower input capacitance to be used.

The TPS785-Q1 provides an active pulldown circuit to

quickly discharge output loads when disabled.