TPS78412QDBVRQ1集成电路（IC）的线性+开关稳压器规格书PDF中文资料

TPS78412QDBVRQ1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TPS78412QDBVRQ1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

• 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.