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.