1 Features

• New product available: TPS548B28 16-V, 20-A

synchronous-buck converter with remote sense

• Conversion input voltage range: 1.5 V to 15 V

• VDD input voltage range: 4.5 V to 25 V

• 92% efficiency from 12 V to 1.5 V at 20 A

• Output voltage range: 0.6 V to 5.5 V

• 5-V LDO output

• Supports single-rail input

• Integrated power MOSFETs with 20 A of

continuous output current

• Auto-skip Eco-mode™ for light-load efficiency

• < 10-μA shutdown current

• D-CAP™ mode with fast transient response

• Selectable switching frequency from 250 kHz to 1

MHz with external resistor

• Selectable auto-skip or PWM-only operation

• Built-in 1% 0.6-V reference

• 0.7-ms, 1.4-ms, 2.8-ms, and 5.6-ms selectable

internal voltage servo soft start

• Integrated boost switch

• Precharged start-up capability

• Adjustable overcurrent limit with thermal

compensation

• Overvoltage, undervoltage, UVLO, and

overtemperature protection

• Supports all ceramic output capacitors

• Open-drain power-good indication

• Incorporates NexFET™ power block technology

• 22-pin QFN package with PowerPAD™

• For SWIFT™ power products documentation, see

http://www.ti.com/swift

2 Applications

• Enterprise rack Servers and storage

• Wired networking switches and routers

• ASIC, SoC, FPGA, DSP core, and I/O voltage

3 Description

TPS53353 is a D-CAP™ mode, 20-A synchronous

switcher with integrated MOSFETs. It is designed

for ease of use, low external component count, and

space-conscious power systems.

This device features 5.5-mΩ / 2.2-mΩ integrated

MOSFETs, accurate 1%, 0.6-V reference, and

integrated boost switch. A sample of competitive

features include: a conversion input voltage range

from 1.5 V to 15 V, very low external component

count, D-CAP™ mode control for super fast transient,

auto-skip mode operation, internal soft-start control,

selectable frequency, and no need for compensation.

The conversion input voltage ranges from 1.5 V to 15

V, the supply voltage range is from 4.5 V to 25 V, and

the output voltage range is from 0.6 V to 5.5 V.

The device is available in 5-mm × 6-mm, 22-pin QFN

package and is specified from –40°C to 85°C.

The TPS548B28 is a newer 20A device designed

for data center applications with a smaller, Pb-free

package.