TPS78408BQWDRBRQ1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: 1.65 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

• 50-dB PSRR out to 100 kHz

• Low IQ: 25 μA (typical)

• Ultra-low dropout:

– 115 mV (max) at 300 mA (3.3 VOUT)

• Internal 500-μs soft-start time to reduce inrush

current

• Active output discharge

• Functional Safety-Capable

– Documentation available to aid functional safety

system design

• Packages:

– 3-mm × 3-mm wettable flank VSON (8)

– 5-pin SOT-23

2 Applications

• Automotive head units

• Hybrid instrument clusters

• Telematics control units

• DC/DC converters

3 Description

The TPS784-Q1 ultra low-dropout regulator (LDO)

is a small, low quiescent current LDO that can

source 300 mA 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 TPS784-Q1 is a flexible device for post

regulation because this device supports an input

voltage range from 1.65 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 TPS784-Q1 offers foldback current limit to reduce

power dissipation during 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 and

allowing for lower input capacitance to be used.

The TPS784-Q1 provides an active pulldown circuit to

quickly discharge output loads when disabled.