1.5V to 15V Input (4.5V to 25V Bias), 30A Synch Step-Down SWIFT™ Converter w/ Eco-mode™


Product details


Vin (Min) (V) 1.5 Vin (Max) (V) 15 Vout (Min) (V) 0.6 Vout (Max) (V) 5.5 Iout (Max) (A) 30 Iq (Typ) (uA) 320 Switching frequency (Min) (kHz) 250 Switching frequency (Max) (kHz) 1000 Features Adjustable Current Limit, Enable, Light Load Efficiency, Power Good, Pre-Bias Start-Up, Synchronous Rectification, Forced PWM, Soft Start Adjustable, Over Current Protection, UVLO Fixed Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

LSON-CLIP (DQP) 22 30 mm² 6 x 5 open-in-new Find other Buck converters (integrated switch)


  • 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
  • Green (RoHS compatible), is optional
  • Create a custom design using the TPS53355 with the WEBENCH® Power Designer

All trademarks are the property of their respective owners.

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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, 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 15V, 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.

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Technical documentation

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Type Title Date
* Datasheet TPS53355 1.5-V to 15-V Input (4.5-V to 25-V bias), 30-A Synch Step-down SWIFT™ Converter with Eco-mode datasheet (Rev. F) Jun. 11, 2019
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Selection guide SWIFT DC/DC Converters Selector Guide (Rev. G) Feb. 06, 2019
Application note DC/DC Point-of-load Power Solutions for Wired Networking Switch Systems Dec. 11, 2018
Application note Minimizing Switching Ringing at TPS53355 and TPS53353 Family Devices (Rev. A) Nov. 14, 2018
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Application note 如何实现比基准更低的输出电压 Apr. 08, 2018
Application note Analysis and Design of Input Filter for DC-DC Circuit Nov. 27, 2017
Selection guide Control-Mode Quick Reference Guide (Rev. A) Sep. 14, 2017
Application note Calculating Output Capacitance to Meet Transient and Ripple Requirements May 02, 2017
Application note Unified Ground Connection Recommendation on TPS53K- Integrated FET-Converter Dev Jan. 25, 2017
Technical articles Don’t say goodbye to your power supply Mar. 07, 2016
Application note SMT Guidelines for Stacked Inductor (Inductor On Top) on Voltage Regulator IC Feb. 22, 2016
Technical articles Power Tips: How to reduce D-CAP control output capacitance Jul. 21, 2015
Application note Not All Jitter Is Created Equal (Rev. A) Jul. 04, 2015
Technical articles Power Tips: How to create an adjustable output power supply Jun. 24, 2015
Application note TPS53319 DCAP Mode with Ripple Injection Modeling Design Consideration Oct. 23, 2014
User guide Using TPS53355EVM-743, High-Efficiency 30A, Synchronous Buck Converter Aug. 09, 2011
Application note D-CAP(TM) Mode With All-Ceramic Output Capacitor Application Feb. 03, 2011

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development


The TPS53355EVM-743 evaluation module provides a fixed 1.5-V output at up to 30 A from a 12-V input bus. The design acheives 89.5% full-load efficiency.

  • 500-kHz operation
  • Jumpers to select frequency, soft-start time, and FCCM/eco-Mode operation
  • Module supports 8-V to 14-V input

Design tools & simulation

SLUM388A.ZIP (38 KB) - PSpice Model
SLUM451.TSC (424 KB) - TINA-TI Reference Design
SLUM452.ZIP (57 KB) - TINA-TI Spice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

Non-Isolated Synchronous Buck (1.8V@8A)
PMP7828 The PMP7828 uitlizes the TPS53355, TPS53318, and TPS53319 buck converters using TI NexFET PowerStack technology to power Xilinx Virtex7 FPGA core and I/O, DDR memory core, and 3.3V System Rail with  high efficiency and excellent thermal performance in a small area.
document-generic Schematic
High Power Density 12Vin, 100W Synchronous DC/DC Step-Down Buck Converter with Inductor-On-Top
TIDA-00510 The TPS53355 Inductor-On-Top step-down buck converter design enables high power density through reduction of X-Y PCB area by placing the output inductor on top of the IC and results in 92% minimum efficiency for 66W and 100W output power designs (3.3V and 5V output)  requiring only (...)
document-generic Schematic
High Power Density Buck Converter with Integrated FET DCAP Regulator Reference Design
PMP10449 The PMP10449 offers a high power desnity solution, able to deliver up to 20A.  This, coupled with over 93% peak efficiency, makes this solution optimal for communications or enterprise switcing applications.
document-generic Schematic
High Power Density 12Vin, 12.6W Buck Converter with Integrated Inductor
TIDA-00471 The TPS53355 Inductor-On-Top step-down buck converter design enables high power density through reduction of X-Y PCB area and results in >86% efficiency with only 1.8W of power loss and 6mV of output voltage ripple requiring only 5x100uF ceramic output caps.
document-generic Schematic
Complete PMBus Power System for Enterprise Ethernet Switches Reference Design
PMP10896 Complete PMBus power system for 3 ASIC/FPGA cores, DDR3 core memory, and auxiliary voltages found on high-performance Ethernet Switches.
document-generic Schematic
Adaptive Voltage Scaling Power Supply for Communication and Enterprise Storage ASIC Core Rails
PMP10488 This design is for implementing an ASIC Core AVS power supply using the the TPS53355 PowerStack Synchronous Buck SWIFT dc/dc converter and the LM10011 VID chip. The design accepts a 10V to 14V input and provides a 1V 20A output. The LM10011 is a precision, digitally programmable device, allowing for (...)
document-generic Schematic

CAD/CAE symbols

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