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.

TPS78501QWDRBRQ1属于集成电路（IC） > 线性 + 开关稳压器。美国德州仪器公司制造生产的TPS78501QWDRBRQ1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。