TPS62916E数据手册TI中文资料规格书

描述 Description

The TPS62916E device is a highly-efficient, low noise, and low ripple current mode synchronous buck converter. The device is 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 10 µVRMS.

The device operates at a fixed switching frequency of 2.2 MHz, 1.4 MHz, or 1 MHz, 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

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

Low output voltage ripple < 10 µVRMS after ferrite bead

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

2.2-MHz, 1.4-MHz, or 1-MHz fixed frequency peak current mode control

Synchronizable with external clock (optional)

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

Spread spectrum modulation (optional)

3.0-V to 17-V input voltage range

0.8-V to 5.5-V output voltage range

25-mΩ/6.5-mΩ 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

2.5-mm × 3.0-mm QFN with 0.5-mm pitch

Create a custom design using the TPS62916E with the WEBENCH Power Designer