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TPS54425

ACTIVE

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

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Data sheet

TPS54425

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (Β°C) -40 to 85 Topology Buck Type Converter Iout (max) (A) 4 Vin (min) (V) 4.5 Vin (max) (V) 18 Switching frequency (min) (kHz) 700 Switching frequency (max) (kHz) 700 Features Enable, Power good, Soft Start Adjustable, Synchronous Rectification Control mode D-CAP2 Vout (min) (V) 0.76 Vout (max) (V) 5.5 Iq (typ) (Β΅A) 850 Duty cycle (max) (%) 90
Rating Catalog Operating temperature range (Β°C) -40 to 85 Topology Buck Type Converter Iout (max) (A) 4 Vin (min) (V) 4.5 Vin (max) (V) 18 Switching frequency (min) (kHz) 700 Switching frequency (max) (kHz) 700 Features Enable, Power good, Soft Start Adjustable, Synchronous Rectification Control mode D-CAP2 Vout (min) (V) 0.76 Vout (max) (V) 5.5 Iq (typ) (Β΅A) 850 Duty cycle (max) (%) 90
HTSSOP (PWP) 14 32 mmΒ² 5 x 6.4
  • D-CAP2β„’ 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 mΞ© (High Side) and 55 mΞ© (Low Side)
  • High Efficiency, less than 10 Β΅A 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)
  • D-CAP2β„’ 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 mΞ© (High Side) and 55 mΞ© (Low Side)
  • High Efficiency, less than 10 Β΅A 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)

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.

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) 25 Jul 2011
User guide TPS54425 Step-Down Converter Evaluation Module User's Guide (Rev. A) PDF | HTML 02 Sep 2021
Application note D-CAP2 Frequency Response Model, based on frequency domain analysis of Fixed On- 02 Jan 2013
Application note Understanding Thermal Dissipation and Design of a Heatsink 04 May 2011

Design & development

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

Evaluation board

TPS54425EVM-608 β€” Evaluation Module for TPS54425 4.5V to 18V Input, 4A Synchronous Step-Down Converter

The TPS54425EVM-608 is a fully assembled and tested circuit for evaluating the TPS54425 Synchronous Step-Down SWIFTβ„’ Converter. The TPS54425EVM-608 operates from a 4.5V to 18V input and delivers a 1.05V output at 4A.
User guide: PDF | HTML
Not available on TI.com
Simulation model

TPS54425 TINA-TI Transient Reference Design

SLIM294.TSC (184 KB) - TINA-TI Reference Design
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Simulation model

TPS54425 TINA-TI Transient Spice Model

SLIM295.ZIP (41 KB) - TINA-TI Spice Model
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Simulation model

TPS54425 Unencrypted PSpice Transient Model Package (Rev. A)

SLIM290A.ZIP (41 KB) - PSpice Model
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Reference designs

TIDA-010011 β€” High efficiency power supply architecture reference design for protection relay processor module

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 (...)
Design guide: PDF
Schematic: PDF
Reference designs

PMP6776 β€” Xilinx Kintex FPGA Power Reference Design

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, (...)
Test report: PDF
Schematic: PDF
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HTSSOP (PWP) 14 Ultra Librarian
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