Product details

Vin (Min) (V) 2.9 Vin (Max) (V) 32 Vout (Min) (V) 3 Vout (Max) (V) 38 Switch current limit (Typ) (A) 6.6 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 100 Switching frequency (Max) (kHz) 1200 Iq (Typ) (mA) 0.5 Features Enable, Frequency Synchronization, Light Load Efficiency Duty cycle (Max) (%) 90 Operating temperature range (C) -40 to 150 Rating Catalog
Vin (Min) (V) 2.9 Vin (Max) (V) 32 Vout (Min) (V) 3 Vout (Max) (V) 38 Switch current limit (Typ) (A) 6.6 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 100 Switching frequency (Max) (kHz) 1200 Iq (Typ) (mA) 0.5 Features Enable, Frequency Synchronization, Light Load Efficiency Duty cycle (Max) (%) 90 Operating temperature range (C) -40 to 150 Rating Catalog
HTSSOP (PWP) 14 22 mm² 5 x 4.4 WQFN (RTE) 16 9 mm² 3 x 3
  • Internal 5-A, 40-V low-side MOSFET switch
  • 2.9-V to 32-V input voltage range
  • ±0.7% reference voltage
  • 0.5-mA operating quiescent current
  • 2.7-µA shutdown supply current
  • Fixed frequency current mode PWM control
  • Frequency adjustable from 100 kHz to 1.2 MHz
  • Synchronization capability to external clock
  • Adjustable soft-start time
  • Pulse skipping for higher efficiency at light loads
  • Cycle-by-cycle current limit, thermal shutdown, and UVLO protection
  • QFN-16 (3-mm × 3-mm) and HTSSOP-14 packages with PowerPAD™
  • Wide –40°C to 150°C operating TJ range
  • Create a custom design using the TPS55340 with the WEBENCH Power Designer
  • Internal 5-A, 40-V low-side MOSFET switch
  • 2.9-V to 32-V input voltage range
  • ±0.7% reference voltage
  • 0.5-mA operating quiescent current
  • 2.7-µA shutdown supply current
  • Fixed frequency current mode PWM control
  • Frequency adjustable from 100 kHz to 1.2 MHz
  • Synchronization capability to external clock
  • Adjustable soft-start time
  • Pulse skipping for higher efficiency at light loads
  • Cycle-by-cycle current limit, thermal shutdown, and UVLO protection
  • QFN-16 (3-mm × 3-mm) and HTSSOP-14 packages with PowerPAD™
  • Wide –40°C to 150°C operating TJ range
  • Create a custom design using the TPS55340 with the WEBENCH Power Designer

The TPS55340 is a monolithic, nonsynchronous, switching regulator with integrated 5-A, 40-V power switch. The device can be configured in several standard switching-regulator topologies, including boost, SEPIC, and isolated flyback. The device has a wide input voltage range to support applications with input voltage from multicell batteries or regulated 3.3-V, 5-V, 12-V, and 24-V power rails.

The TPS55340 regulates the output voltage with current mode PWM (pulse width modulation) control, and has an internal oscillator. The switching frequency of PWM is set by either an external resistor or by synchronizing to an external clock signal. The user can program the switching frequency from 100 kHz to 1.2 MHz.

The device features a programmable soft-start function to limit inrush current during start-up and has other built-in protection features including cycle-by-cycle overcurrent limit and thermal shutdown.

The TPS55340 is available in a small 3-mm × 3-mm 16-pin QFN as well as 14-pin HTSSOP packages with PowerPAD for enhanced thermal performance.

The 5-A, 40-V TPS55340 boost converter in the HTSSOP-14 package is pin-to-pin compatible with the 3-A, 40-V TPS61175, and it extends the maximum input voltage from 18 V to 32 V.

The TPS55340 is a monolithic, nonsynchronous, switching regulator with integrated 5-A, 40-V power switch. The device can be configured in several standard switching-regulator topologies, including boost, SEPIC, and isolated flyback. The device has a wide input voltage range to support applications with input voltage from multicell batteries or regulated 3.3-V, 5-V, 12-V, and 24-V power rails.

The TPS55340 regulates the output voltage with current mode PWM (pulse width modulation) control, and has an internal oscillator. The switching frequency of PWM is set by either an external resistor or by synchronizing to an external clock signal. The user can program the switching frequency from 100 kHz to 1.2 MHz.

The device features a programmable soft-start function to limit inrush current during start-up and has other built-in protection features including cycle-by-cycle overcurrent limit and thermal shutdown.

The TPS55340 is available in a small 3-mm × 3-mm 16-pin QFN as well as 14-pin HTSSOP packages with PowerPAD for enhanced thermal performance.

The 5-A, 40-V TPS55340 boost converter in the HTSSOP-14 package is pin-to-pin compatible with the 3-A, 40-V TPS61175, and it extends the maximum input voltage from 18 V to 32 V.

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Technical documentation

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Type Title Date
* Data sheet TPS55340 Integrated 5-A Wide Input Range Boost/SEPIC/Flyback DC/DC Regulator datasheet (Rev. E) 13 Sep 2021
Application note Mitigating Procedure on Voltage Spike of Switching Node from Flyback Converter 08 Oct 2020
EVM User's guide TPS55340EVM-017 5-12V Input, 24V Output Boost Evaluation Module (Rev. B) 17 Jul 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
User guide PMLK Boost Experiment Book (Rev. A) 31 Aug 2016
EVM User's guide Using the TPS55340EVM-147 6-18V input, 12V output SEPIC Evaluation Module (Rev. A) 02 Aug 2013
EVM User's guide Using the TPS55340EVM-148 8-24V Input, 5V Output Flyback Evaluation Module (Rev. A) 18 Jun 2013
Application note Isolated Continuous Conduction Mode Flyback Using the TPS55340 31 Dec 2012
Application note Using the TPS55340 as a SEPIC.. (Rev. A) 18 Jul 2012

Design & development

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

Evaluation board

PMLKBOOSTEVM — TI-PMLK Boost Experiment Board using TPS55340 & LM5122

The TI-PMLK Boost Experiment Board is part of the TI Power Management Lab Kit (TI-PMLK) series. TI-PMLK series provides hands on learning to reinforce power supply knowledge. The modular format allows users to customize the TI-PMLK series experience in a way that makes the most impact on (...)

Evaluation board

PMLKBOOSTEVMB — TI-PMLK Boost Experiment Board using TPS55340 & LM5122 with TI-PMLK Boost Experiment Lab Book

The TI-PMLK Boost Experiment Board is part of the TI Power Management Lab Kit (TI-PMLK) series. TI-PMLK series provides hands on learning to reinforce power supply knowledge. The modular format allows users to customize the TI-PMLK series experience in a way that makes the most impact on (...)

Evaluation board

TPS55340EVM-017 — Boost Evaluation Module for TPS55340 5A, 40V Current Mode Integrated-FET DC Converter

The Texas Instruments TPS55340EVM-017 evaluation module is a fully assembled and tested circuit for evaluating the TPS55340 5A, 40V Current Mode Integrated-FET Boost DC Converter.
Evaluation board

TPS55340EVM-147 — SEPIC Evaluation Module for TPS55340 5A, 40V Current Mode Integrated-FET DC Converter

The Texas Instruments TPS55340EVM-147 evaluation module (EVM) helps designers evaluate the performance of the TPS55340 DC/DC boost converter in a SEPIC topology.
Evaluation board

TPS55340EVM-148 — Isolated Flyback Topology Module for TPS55340 5A, 40V Current Mode Integrated-FET DC Converter

The Texas Instruments TPS55340EVM-148 helps designers evaluate the performance of the TPS55340 DC/DC Boost Converter in an isolated flyback topology.
Simulation model

TPS55340 Unencrypted PSpice Transient Model Package (Rev. B)

SLVM589B.ZIP (48 KB) - PSpice Model
Simulation model

TPS55340 TINA-TI Transient Spice Model

SLVMA30.ZIP (40 KB) - TINA-TI Spice Model
Simulation model

TPS55340 TINA-TI Transient Reference Design

SLVMA31.TSC (188 KB) - TINA-TI Reference Design
Simulation model

TPS55340 Unencrypted PSpice Transient Model

SLVMD92.ZIP (5 KB) - PSpice Model
Simulation model

TPS55340 PSpice Average Model

SLVMDB3.ZIP (44 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

FLYBUCK-FLYBACK-DESIGN-CALC — Fly-Buck and Flyback Topology Selector

This tool helps a power supply engineer to select the right isolated DC-DC topology based on the specifications. Depending on the topology chosen, the calculator also recommends the right IC for the design.
Calculation tool

TPS55340 SEPIC Design Excel Tool (Rev. A)

SLVC433A.ZIP (152 KB)
Reference designs

TIDA-00080 — Isolated delta-sigma modulator based AC/DC voltage and current measurement module reference design

This isolated shunt based current measurement unit enables high accuracy current measurement without the use of Current Transformers (CT). The isolation is achieved through the use of AMC1304 that incorporates both high voltage isolation as well as the Delta-Sigma Modulator. This solution (...)
Reference designs

TIDA-00171 — Isolated Current Shunt and Voltage Measurement Reference Design for Motor Drives

This evaluation kit and reference design implements the AMC130x reinforced isolated delta-sigma modulators along with integrated Sinc filters in the C2000™ TMS320F28377D Delfino™ microcontroller. The design provides an ability to evaluate the  performance of these measurements: three motor (...)
Reference designs

PMP10802 — Integrated FET Boost Converter (11V@1.2A) Reference Design

This integrated FET boost converter supplies 11V @ 1.2A from a 6V - 8.4V input (2S Li-Ion battery). The converter was optimized to provide high efficiency and low cost in a compact size for applications such as portable radios.
Reference designs

PMP10486 — 15V@1A Integrated FET Boost Converter Reference Design

This integrated FET boost converter uses the TPS55340 controller to regulate 15V @ 1A from a 5V (4.5V min) input voltage. It is capable of supplying 1.5A pk loads for short duration, has excellent transient performance, and a small form-factor.
Reference designs

PMP8871 — Low Voltage Flyback Converter Provides 5KV Isolation Reference Design

This isolated flyback converter provides a regulated 5V @ 1A output from a low voltage input (3.5V - 5.5V). The PMP8871 is built on the TPS55340 boost converter EVM.
Package Pins Download
HTSSOP (PWP) 14 View options
WQFN (RTE) 16 View options

Ordering & quality

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  • Ongoing reliability monitoring

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