TPS62916-Q1数据手册TI中文资料规格书

描述 Description

The automotive-qualifiedTPS6291x-Q1 devices are a family of high-efficiency, low noise, and low ripple current mode synchronous buck converters. The devices are designed for noise sensitive applications that normally use an LDO for post regulation such as high-speed ADCs, clock and jitter cleaner, serializer, de-serializer, and radar applications.

To reduce the output voltage ripple, the device loop compensation is designed to operate with an optional second-stage ferrite bead L-C filter. Low-frequency noise levels, similar to a low-noise LDO, are further achieved by filtering the internal voltage reference with a capacitor connected to the NR/SS pin. Combined, these features allow for an output voltage ripple below 10µVRMS.

The device operates at a fixed switching frequency of 2.2MHz, 1.4MHz, or 1MHz, and can be synchronized to an external clock. An optional spread spectrum modulation scheme spreads the DC/DC switching frequency over a wider span, which lowers the mixing spurs.

特性 Features

AEC-Q100 qualified for automotive applications:

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



Functional Safety-Capable

Documentation available to aid functional safety system design



Low output 1/f noise < 20µVRMS (100Hz to 100kHz)

Low output voltage ripple < 10µVRMS after ferrite bead

High PSRR of > 65dB (up to 100kHz)

2.2MHz, 1.4MHz, or 1.0MHz fixed frequency peak current mode control

Synchronizable with external clock (optional)

Integrated loop compensation supports ferrite bead for second stage L-C filter with 30dB attenuation (optional)

Spread spectrum modulation (optional)

3.0V to 17V input voltage range

0.8V to 5.5V output voltage range

25mΩ/7mΩ RDSon

Output voltage accuracy of ±1% over temperature

Precise enable input allows

User-defined undervoltage lockout

Exact sequencing



Adjustable soft start

Power-good output

Output discharge (optional)

–55°C to 150°C junction temperature range

2.0mm × 3.0mm QFN with 0.5mm pitch

Create a custom design using the TPS6291x-Q1 with the WEBENCH Power Designer