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) (uA) 320 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
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) (uA) 320 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
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.

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Technical documentation

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Type Title Date
* Data sheet TPS53311 3-A Step-Down Regulator With Integrated Switcher datasheet (Rev. B) 27 Sep 2016
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
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.
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Simulation model

TPS53311 PSpice Average Model

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

Type III Compensation Calculation Tool (Rev. E)

SLUC263E.ZIP (185 KB)
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 (...)
Package Pins Download
VQFN (RGT) 16 View options

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