TPS54425

ACTIVE

4.5V to 18V Input, 4A Synchronous Step-Down Converter

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Product details

Parameters

Vin (Min) (V) 4.5 Vin (Max) (V) 18 Vout (Min) (V) 0.76 Vout (Max) (V) 5.5 Iout (Max) (A) 4 Iq (Typ) (uA) 850 Switching frequency (Min) (kHz) 700 Switching frequency (Max) (kHz) 700 Features Enable, Power Good, Synchronous Rectification, Soft Start Adjustable Operating temperature range (C) -40 to 85 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HTSSOP (PWP) 14 32 mm² 5 x 6.4 open-in-new Find other Buck converters (integrated switch)

Features

  • D-CAP2™ Mode Enables Fast Transient Response
  • Low Output Ripple and Allows Ceramic Output Capacitor
  • Wide VIN Input Voltage Range: 4.5 V to 18 V
  • Output Voltage Range: 0.76 V to 5.5 V
  • Highly Efficient Integrated FET’s Optimized
    for Lower Duty Cycle Applications
    – 65 mΩ (High Side) and 55 mΩ (Low Side)
  • High Efficiency, less than 10 µA at shutdown
  • High Initial Bandgap Reference Accuracy
  • Adjustable Soft Start
  • Pre-Biased Soft Start
  • 700-kHz Switching Frequency (fSW)
  • Cycle By Cycle Over Current Limit
  • Power Good Output
  • APPLICATIONS
    • Wide Range of Applications for Low Voltage System
      • Digital TV Power Supply
      • High Definition Blu-ray Disc Players
      • Networking Home Terminal
      • Digital Set Top Box (STB)

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Description

The TPS54425 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54425 enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low component count, low standby current solution. The main control loop for the TPS54425 uses the D-CAP2 mode control which provides a very fast transient response with no external compensation components. The TPS54425 also has a proprietary circuit that enables the device to adopt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18-V VIN input. The output voltage can be programmed between 0.76 V and 5.5 V. The device also features an adjustable soft start time and a power good function. The TPS54425 is available in the 14-pin HTSSOP package, and designed to operate from –40°C to 85°C.

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Technical documentation

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Type Title Date
* Data sheet 4-A Output Single Synchronous Step Down Switcher With Integrated FET (SWIFT) datasheet (Rev. C) Jul. 25, 2011
User guide TPS54425 Step-Down Converter Evaluation Module User's Guide (Rev. A) Sep. 02, 2021
Technical article Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application note D-CAP2 Frequency Response Model, based on frequency domain analysis of Fixed On- Jan. 02, 2013
Application note Understanding Thermal Dissipation and Design of a Heatsink May 04, 2011

Design & development

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

Hardware development

EVALUATION BOARD Download
document-generic User guide
25
Description
The TPS54425EVM-608 is a fully assembled and tested circuit for evaluating the TPS54425 Synchronous Step-Down SWIFT™ Converter. The TPS54425EVM-608 operates from a 4.5V to 18V input and delivers a 1.05V output at 4A.
Features
  • D-CAP2 Mode Enables Fast Transient Response
  • Low Output Ripple and Allows Ceramic Output Capacitor
  • Wide VCC Input Voltage Range: 4.5 V to 18 V
  • Wide VIN Input Voltage Range: 2 V to 18 V
  • Output Voltage Range: 0.76 V to 5.5 V
  • Highly Efficient Integrated FETs Optimized for Lower Duty Cycle Applications
  • High (...)

Design tools & simulation

SIMULATION MODEL Download
SLIM290A.ZIP (41 KB) - PSpice Model
SIMULATION MODEL Download
SLIM294.TSC (184 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SLIM295.ZIP (41 KB) - TINA-TI Spice Model
SIMULATION TOOL Download
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 (...)
Features
  • 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

REFERENCE DESIGNS Download
High efficiency power supply architecture reference design for protection relay processor module
TIDA-010011 — This reference design showcases various power architectures for generating multiple voltage rails for an application processor module, requiring >1A load current and high efficiency . The required power supply is generated using 5-, 12- or 24-V DC input from the backplane. Power supplies are (...)
document-generic Schematic
REFERENCE DESIGNS Download
11..13V -> 3.3V @ 3.0A
PMP5619 — PMP5619 is a power solution for settop boxes or computers. The used TPS54425 is a low cost part and uses D-CAP2 mode, which results in an outstanding load step regulation.
REFERENCE DESIGNS Download
Xilinx Kintex FPGA Power Reference Design
PMP6776 PMP6776 is a low-cost non-isolated synchronous buck power supply. This design uses TPS56121 and TPS54620 Synchronous Buck Converters and TPS54425 and TPS54225 Step-Down Switchers to generate 7 outputs. Features include input voltage range 10.8V to 13.2V and outputs 1V at 6A, 1.5V at 4A, 1.8V at 6A (...)
document-generic Schematic
REFERENCE DESIGNS Download
Set Top Box Power Solution
PMP6638 This reference design is an example of power-trees inside a set-top-box. It performs DC-DC conversions, from 12V supply, for 1.0V/1.2V/1.8V/2.5V/3.3V/5V rails.
document-generic Schematic

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 14 View options

Ordering & quality

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