TPS6291x 3-V to 17-V, 2-A/3-A Low Noise and Low Ripple Buck Converter with

Integrated Ferrite Bead Filter Compensation

1 Features

kHz)

bead

• High PSRR of > 80 dB (up to 100 kHz)

• 2.2-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 (optional)

• Spread spectrum modulation (optional)

• 3.0-V to 17-V input voltage range

• 0.8-V to 5.5-V output voltage range

• Output voltage accuracy of ±1%

• Precise enable input allows

– User-defined undervoltage lockout

– Exact sequencing

• Adjustable soft start

• Power-good output

• Output discharge (optional)

• -40°C to 150°C junction temperature range

• 2.0-mm x 2.0-mm QFN with 0.5-mm pitch

• Create a custom design using the TPS6291x with

the WEBENCH® Power Designer

2 Applications

• Telecom infrastructure

• Test and measurement

• Aerospace and defense (radar/avionics)

• Medical

3 Description

The TPS6291x devices are a family of high efficiency

low noise and low ripple synchronous buck

converters. The devices are ideal for noise sensitive

applications that would normally use an LDO for post

regulation such as high speed ADCs, Clock and Jitter

Cleaner, Serializer, De-serializer, and Radar

applications.

The device operates at a fixed switching frequency of

2.2 MHz or 1 MHz, and can be synchronized to an

external clock.

To further reduce the output voltage ripple, the device

integrates loop compensation to operate with an

optional second-stage ferrite bead L-C filter. This

Low-frequency noise levels, similar to a low-noise

LDO, are achieved by filtering the internal voltage

reference with a capacitor connected to the NR/SS

pin.

The optional spread spectrum modulation scheme

spreads the DC/DC switching frequency over a wider

span, which lowers the mixing spurs.

Device Information

DEVICE

NAME

OUTPUT

CURRENT

PACKAGE

(1)

BODY SIZE (NOM)

TPS62912

2 A

QFN (10)

2.0 mm x 2.0 mm

TPS62913

3 A

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

Output Noise vs Frequency

Vo

3.3V/3A

Vin

12V

VIN

EN/SYNC

VO

2x10µF

2.2µH

3x22µF

FB

S-CONF

NR/SS

SW

470nF

2x22µF

Ferrite

Bead

4.87k

15.4k

PSNS

PGND

PG

2.2nF

Typical Application

www.ti.com

TPS62912, TPS62913

SLVSFP4 – AUGUST 2020

Copyright © 2020 Texas Instruments Incorporated

Submit Document Feedback

1

Product Folder Links: TPS62912 TPS62913

TPS62912, TPS62913

SLVSFP4 – AUGUST 2020

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. ADVANCE INFORMATION for preproduction products; subject to change

without notice.