TPS79333DBVRQ1集成电路（IC）的线性+开关稳压器规格书PDF中文资料

TPS79333DBVRQ1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TPS79333DBVRQ1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

• Available in fixed and adjustable options

• High PSRR: 43dB at 100kHz (legacy chip)

• High PSRR: 39dB at 100kHz (new chip)

• Fast start-up time: 50μs (legacy chip)

• Internal 500μs soft-start time to reduce inrush

current (new chip)

• Stable with a 2.2μF ceramic capacitor

• Very low dropout 112mV (typ) at full load

• Packages:

– 6-pin SOT-23

– 5-pin SOT-23

2 Applications

• Automotive head units

• Hybrid instrument clusters

• Telematics control units

• DC/DC converters

3 Description

The TPS793-Q1 is a low-dropout (LDO), low-power,

linear voltage regulator. This device features high

power-supply rejection ratio (PSRR), ultra-low noise,

fast start-up, and excellent line and load transient

response. The TPS793-Q1 is available in smalloutline

SOT-23 packages that sources 200mA.

The TPS793-Q1 is designed for post-regulation

applications, offering fixed and adjustable options

supporting common voltage rails like 3.3V. The low

noise and PSRR performance makes the device

designed for power-sensitive analog loads.

The TPS793-Q1 offers foldback current limit to reduce

power dissipation during overcurrent condition. The

EN input helps with power-sequencing requirements

of the system. The internal soft-start provides a

controlled start-up, reducing inrush current and

allowing lower input capacitance to be used.