Home Power management DC/DC switching regulators Step-down (buck) regulators Buck converters (integrated switch)

TPS53311

ACTIVE

2.9V to 6V Input, 3A Synchronous Step-Down Converter with Eco-Mode and Smooth PWM

A newer version of this product is available

open-in-new Compare alternates
Same functionality with different pin-out to the compared device
TPSM82813 ACTIVE 2.75-V to 6-V, 3-A step-down module with adjustable-frequency & tracking in 3 x 4-mm μSIP package Module with integrated inductor with or without spread spectrum

Product details

Vin (min) (V) 2.9 Vin (max) (V) 6 Vout (min) (V) 0.6 Vout (max) (V) 4.2 Iout (max) (A) 3 Iq (typ) (mA) 0.32 Switching frequency (min) (kHz) 1100 Switching frequency (max) (kHz) 1100 Features Enable, Light load efficiency, Output discharge, Phase Interleaving, Power good, Pre-Bias Start-Up, Synchronous Rectification Operating temperature range (°C) -40 to 85 Rating Catalog Regulated outputs (#) 1 Control mode Voltage mode Duty cycle (max) (%) 99 Type Converter
Vin (min) (V) 2.9 Vin (max) (V) 6 Vout (min) (V) 0.6 Vout (max) (V) 4.2 Iout (max) (A) 3 Iq (typ) (mA) 0.32 Switching frequency (min) (kHz) 1100 Switching frequency (max) (kHz) 1100 Features Enable, Light load efficiency, Output discharge, Phase Interleaving, Power good, Pre-Bias Start-Up, Synchronous Rectification Operating temperature range (°C) -40 to 85 Rating Catalog Regulated outputs (#) 1 Control mode Voltage mode Duty cycle (max) (%) 99 Type Converter
VQFN (RGT) 16 9 mm² 3 x 3
  • 95.5% Maximum Efficiency
  • Continuous 3-A Output Current
  • Supports All MLCC Output Capacitor
  • SmoothPWM™ Auto-Skip Eco-mode™ for Light-Load Efficiency
  • Voltage Mode Control
  • Supports Master-Slave Interleaved Operation
  • Synchronization up to ±20% of Nominal Frequency
  • Conversion Voltage Range From 2.9 V to 6 V
  • Soft-Stop Output Discharge During Disable
  • Adjustable Output Voltage Ranging From 0.6 V to 0.84 V × VIN
  • Overcurrent, Overvoltage, and Overtemperature Protection
  • Small, 3 mm × 3 mm, 16-Pin VQFN Package
  • Open-Drain Power Good Indication
  • Internal Boot Strap Switch
  • Low RDS(on), 24 mΩ With 3.3-V Input and 19-mΩ With 5-V Input
  • Supports Prebias Start-Up Functionality
  • 95.5% Maximum Efficiency
  • Continuous 3-A Output Current
  • Supports All MLCC Output Capacitor
  • SmoothPWM™ Auto-Skip Eco-mode™ for Light-Load Efficiency
  • Voltage Mode Control
  • Supports Master-Slave Interleaved Operation
  • Synchronization up to ±20% of Nominal Frequency
  • Conversion Voltage Range From 2.9 V to 6 V
  • Soft-Stop Output Discharge During Disable
  • Adjustable Output Voltage Ranging From 0.6 V to 0.84 V × VIN
  • Overcurrent, Overvoltage, and Overtemperature Protection
  • Small, 3 mm × 3 mm, 16-Pin VQFN Package
  • Open-Drain Power Good Indication
  • Internal Boot Strap Switch
  • Low RDS(on), 24 mΩ With 3.3-V Input and 19-mΩ With 5-V Input
  • Supports Prebias Start-Up Functionality

The TPS53311 provides a fully integrated 3-V to 5-V VIN integrated synchronous FET converter solution with 16 total components, in 200 mm2 of PCB area. Due to the low RDS(on) and TI Proprietary SmoothPWM™ skip mode of operation, it enables 95.5% peak efficiency, and over 90% efficiency at loads as light as 100 mA. It requires only two 22-µF ceramic output capacitors for a power-dense, 3-A solution.

The TPS53311 features a 1.1-MHz switching frequency, SKIP mode operation support, prebias start-up, internal soft start, output soft discharge, internal VBST switch, power good, EN/input UVLO, overcurrent, overvoltage, undervoltage, and overtemperature protections and all ceramic output capacitor support. It supports supply voltage from 2.9 V to 3.5 V and conversion voltage from 2.9 V to 6 V, and output voltage is adjustable from 0.6 V to 0.84 V × VIN.

The TPS53311 is available in the 3 mm × 3 mm 16-pin VQFN package (Green RoHs compliant and Pb free) and operates between –40°C and 85°C.

The TPS53311 provides a fully integrated 3-V to 5-V VIN integrated synchronous FET converter solution with 16 total components, in 200 mm2 of PCB area. Due to the low RDS(on) and TI Proprietary SmoothPWM™ skip mode of operation, it enables 95.5% peak efficiency, and over 90% efficiency at loads as light as 100 mA. It requires only two 22-µF ceramic output capacitors for a power-dense, 3-A solution.

The TPS53311 features a 1.1-MHz switching frequency, SKIP mode operation support, prebias start-up, internal soft start, output soft discharge, internal VBST switch, power good, EN/input UVLO, overcurrent, overvoltage, undervoltage, and overtemperature protections and all ceramic output capacitor support. It supports supply voltage from 2.9 V to 3.5 V and conversion voltage from 2.9 V to 6 V, and output voltage is adjustable from 0.6 V to 0.84 V × VIN.

The TPS53311 is available in the 3 mm × 3 mm 16-pin VQFN package (Green RoHs compliant and Pb free) and operates between –40°C and 85°C.

Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 4
Type Title Date
* Data sheet TPS53311 3-A Step-Down Regulator With Integrated Switcher datasheet (Rev. B) PDF | HTML 27 Sep 2016
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note Unified Ground Connection Recommendation on TPS53K- Integrated FET-Converter Dev 25 Jan 2017
User guide Using the TPS53311EVM-561, a 3-A Eco-mode(TM) Integrated Switcher w/Mastr-Slave (Rev. A) 11 Nov 2010

Design & development

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

Evaluation board

TPS53311EVM-561 — Evaluation Module for TPS53311 Synchronous Step Down DCDC Converter

The TPS53311EVM-561 is a fully assembled and tested circuit for evaluating the TPS53311 Synchronous Step Down DC/DC Converter.
User guide: PDF
Not available on TI.com
Simulation model

TPS53311 PSpice Average Model

SLIM226.ZIP (62 KB) - PSpice Model
Calculation tool

SLUC263 Type III Compensation Calculation Tool

Supported products & hardware

Supported products & hardware

Products
Buck converters (integrated switch)
TPS53311 2.9V to 6V Input, 3A Synchronous Step-Down Converter with Eco-Mode and Smooth PWM TPS53313 4.5-V to 16-V, 6-A synchronous buck converter with optimized light load efficiency TPS53316 High-Efficiency, 5-A Step-Down Regulator with Integrated Switcher TPS56121 4.5-V to 14-V, 15-A synchronous SWIFT™ buck converter TPS56221 4.5-V to 14-V, 25-A synchronous SWIFT™ buck converter
Buck controllers (external switch)
TPS40007 2.25V-5.5V, 300 kHz, Synchronous Buck Controller, Source/ Sink, Prebias Operation TPS40009 2.25V-5.5V, 600 kHz, Synchronous Buck Controller, Source/ Sink, Prebias Operation TPS40021 Enhanced Low Input (2.25V-5.5V) up to 1MHz Frequency, Sync. Buck Controller, source/sink TPS40040 2.25 to 5.5 V input, 300 kHz, synchronous buck controller with low pin count TPS40041 2.25 to 5.5 V input, 600 kHz, synchronous buck controller with low pin count TPS40055 Wide Input (8V-40V) up to 1MHz Frequency Synchronous Buck Controller, source/sink TPS40057 Wide Input (8V-40V) up to 1MHz Frequency Synchronous Buck Controller, source/sink with prebias TPS40075 4.5-V to 28-V, synchronous buck controller with voltage feed forward TPS40077 4.5-V to 28-V, synchronous buck controller with voltage feed forward in HTSSOP package TPS40101 4.5-V to 18-V, synchronous buck controller with advanced sequencing and output margining TPS40170 4.5 V to 60 V Wide-Input Synchronous PWM Buck Controller TPS40190 4.5-V to 15-V, 20-A synchronous buck controller TPS40192 4.5-V to 18-V, 20-A, 600-kHz synchronous buck controller with power good TPS40193 4.5-V to 18-V, 20-A, 300-kHz synchronous buck controller with power good TPS40195 4.5-V to 20-V, 20-A, synchronous buck controller with power good and synchronization TPS40200 Wide Input Non-Synchronous Buck DC/DC Controller TPS40303 3-V to 20-V, 25-A, 300-kHz synchronous buck controller with FSS TPS40304 3-V to 20-V, 25-A, 600-kHz synchronous buck controller with FSS TPS40305 3-V to 20-V, 25-A, 1.2-MHz synchronous buck controller with FSS TPS40322 Dual Output or Two-phase Synchronous Buck Controller TPS40400 3-V to 20-V, 30-A, synchronous buck controller with PMBus™, including Telemetry TPS40422 Dual Output or Multiphase Synchronous Buck Controller with PMBus TPS5130 4.5-V to 28-V, triple synchronous buck controller with LDO controller
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Reference designs

PMP5922 — Sync Buck for Intel Atom E6xx Tunnel Creek (1.25V @ 10mA)

TI's Highest Power Density Low Input Voltage Complete Intel Atom E6xx (Tunnel Creek) power system designs; in 967mm2 this design has all the voltage regulators needed to power Intel's Atom E6xx CPU platform and fit onto a 70x70 or smaller COM Express Module used in Industrial Automation and Process (...)
Test report: PDF
Schematic: PDF
Package Pins Download
VQFN (RGT) 16 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos