1 Features

• Alternative product available: LMZ31530 14.5-V,

30-A step-down power module in 15 × 16 × 5.8-

mm QFN package

• 96% maximum efficiency

• Conversion input voltage range: 1.5 V to 15 V

• VDD input voltage range: 4.5 V to 25 V

• Output voltage range: 0.6 V to 5.5 V

• 5-V LDO output

• Supports single rail input

• Integrated power MOSFETs with 30 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

• Green (RoHS compatible) is optional

• Create a custom design using the TPS53355 with

the WEBENCH® Power Designer

2 Applications

• Enterprise servers and storage

• Wired networking switches and routers

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

3 Description

The TPS53355 is a D-CAP™ mode, 30-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-mΩ/2-mΩ integrated

MOSFETs, accurate 1% 0.6-V reference, and

integrated boost switch. A sample of competitive

features include: 1.5-V to 15-V wide conversion input

voltage range, very low external component count, DCAP

™ 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 6-mm × 5-mm, 22-pin QFN

package.

The LMZ31530 integrates the TPS53355, an inductor,

and other passive components into a small, easy-touse

module.