Product details

Vin (Min) (V) 3.5 Vin (Max) (V) 28 Vout (Min) (V) 0.8 Vout (Max) (V) 26 Iout (Max) (A) 1.7 Iq (Typ) (uA) 100 Switching frequency (Min) (kHz) 50 Switching frequency (Max) (kHz) 1100 Features Light Load Efficiency, Soft Start Adjustable, Light Load Efficiency, Spread Spectrum, Fixed Output Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
Vin (Min) (V) 3.5 Vin (Max) (V) 28 Vout (Min) (V) 0.8 Vout (Max) (V) 26 Iout (Max) (A) 1.7 Iq (Typ) (uA) 100 Switching frequency (Min) (kHz) 50 Switching frequency (Max) (kHz) 1100 Features Light Load Efficiency, Soft Start Adjustable, Light Load Efficiency, Spread Spectrum, Fixed Output Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
SOIC (D) 8 19 mm² 4.9 x 3.9
  • 3.5-V to 28-V Wide Input Voltage Range
  • Up to 1.7-A Maximum Continuous Output Loading Current
  • Pulse Skipping Mode to Achieve High Light Load Efficiency
  • High Light Load Efficiency
  • Frequency Spread Spectrum to Reduce EMI
  • Adjustable 50-kHz to 1.1-MHz Switching Frequency Set by an External Resistor
    (Leave pin ROSC floating. Set frequency to 120 kHz and ground connection to 70 kHz)
  • Frequency Spread Spectrum to Ease EMI Issue
  • Peak Current-Mode Control
  • Cycle-by-CycleOver Current Protection
  • External Soft Start
  • Available in SOIC8 Package
  • 3.5-V to 28-V Wide Input Voltage Range
  • Up to 1.7-A Maximum Continuous Output Loading Current
  • Pulse Skipping Mode to Achieve High Light Load Efficiency
  • High Light Load Efficiency
  • Frequency Spread Spectrum to Reduce EMI
  • Adjustable 50-kHz to 1.1-MHz Switching Frequency Set by an External Resistor
    (Leave pin ROSC floating. Set frequency to 120 kHz and ground connection to 70 kHz)
  • Frequency Spread Spectrum to Ease EMI Issue
  • Peak Current-Mode Control
  • Cycle-by-CycleOver Current Protection
  • External Soft Start
  • Available in SOIC8 Package

The TPS5402 is a monolithic non-synchronous buck regulator with wide operating input voltage range from 3.5 V to 28 V. Current mode control with internal slope compensation is implemented to reduce component count.

TPS5402 also features a light load pulse skipping mode, which allows for a power loss reduction from the input power supply to the system at light loading.

The switching frequency of the converters can be set from 50 kHz to 1.1 MHz with an external resistor. Frequency spread spectrum operation is introduced for EMI reduction.

A cycle-by-cycle current limit with frequency fold back protects the IC at over loading condition.

The TPS5402 is a monolithic non-synchronous buck regulator with wide operating input voltage range from 3.5 V to 28 V. Current mode control with internal slope compensation is implemented to reduce component count.

TPS5402 also features a light load pulse skipping mode, which allows for a power loss reduction from the input power supply to the system at light loading.

The switching frequency of the converters can be set from 50 kHz to 1.1 MHz with an external resistor. Frequency spread spectrum operation is introduced for EMI reduction.

A cycle-by-cycle current limit with frequency fold back protects the IC at over loading condition.

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Technical documentation

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Type Title Date
* Data sheet Monolithic Non-Synchronous Step-Down Regulator With Integrated MOSFET . datasheet 12 Sep 2012
User guide TPS5402EVM Step-Down Converter Evaluation Module User's Guide (Rev. A) 01 Nov 2021
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Application note Lead-Acid Charger and LED Driver using TPS5402 (Rev. A) 13 Jun 2013

Design & development

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

Evaluation board

TPS5402EVM — TPS5402 Evaluation Module

The TPS5402EVM is a fully assembled and tested circuit for evaluating the TPS5402 non-synchronous step-down SWIFT™ converter. The EVM converts a 3.5-V to 28-V input voltage to a regulated 3.3-V output voltage that delivers up to 1.7 A. The TPS5402EVM is designed with an external fixed (...)

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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

TIDEP0039 — Sercos III Slave For AM437x Communication Development Platform Reference Design

The TIDEP0039 Sercos III Slave For AM437x Communication Development Platform Reference Design combines the AM437x Sitara processor family from Texas Instruments (TI) and the Sercos III media access control (MAC) layer into a single system-on-chip (SoC) solution. Targeted for Sercos III slave (...)
Reference designs

TIDEP0025 — Single Chip Drive for Industrial Communications and Motor Control

This reference design implements hardware interface based on the HEIDENHAIN EnDat 2.2 standard for position or rotary encoders. The platform also allows you to implement real-time EtherCAT communications standards in a broad range of industrial automation equipment. It enables designs with a low (...)
Reference designs

TIDEP0022 — ARM MPU with Integrated BiSS C Master Interface Reference Design

Implementation of BiSS C Master protocol on Industrial Communication Sub-System (PRU-ICSS). The design provides full documentation and source code for Programmable Realtime Unit (PRU).
Reference designs

TIDEP0035 — ARM MPU with Integrated HIPERFACE DSL Master Interface Reference Design

This reference design implements HIPERFACE DSL master protocol on Industrial Communication Sub-System (PRU-ICSS). The two-wire interface allows integration of position feedback wires into motor cable.  It consists of AM437x PRU-ICSS firmware and TIDA-00177 transceiver reference design.
Reference designs

TIDEP0050 — EnDat 2.2 System Reference Design

This reference design implements EnDat 2.2 Master protocol stack and hardware interface based on HEIDENHAIN EnDat 2.2 standard for position or rotary encoders. The design is composed of EnDat 2.2 Master protocol stack, half-duplex communications using RS-485 transceivers and the line termination (...)
Reference designs

PMP4408 — Offline AC/DC 120W Multi-Output Flyback Power Supply Reference Design

The PMP4408 is a universal AC input, 120W flyback converter reference design. The LM5023 Quasi Resonant Flyback converter was chosen to get 2 high-efficiency isolated outputs. Additionally a downstream Buck converter, the TPS5402 enables 2 high-efficiency non-isolated outputs. The QR Flyback design (...)
Reference designs

PMP10928 — 6-12V Input to 1.5V/1.5A Output Reference Design with CC/CV Controls

The PMP10928 reference design uses the TPS5402 non-synchronous Buck controller along with INA213 current shunt monitor to achieve CC/CV control for an 1.5V/1.5A output from 6-12V input voltage.  +/-5% voltage regulation in CV mode and +/-5% in CC mode is achieved in this design. It is notable (...)
Reference designs

PMP10822 — Ten Output QR Flyback and Buck Converter Reference Design

The PMP10822 reference design utilizes two QR flyback, and four buck converters. The efficiency for the 12V and 24V flyback approaches 87%, while the 16V buck converter has efficiency greater than 89%.
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