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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) 3 Iq (Typ) (mA) 0.85 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 VCC Input Voltage Range: 4.5 V to 18 V
  • Wide VIN Input Voltage Range: 2.0 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 – 120 mΩ (High Side)
    and 70 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
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Description

The TPS54325 device is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54325 device 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 TPS54325 uses the D-CAP2™ mode control which provides a very fast transient response with no external components. The TPS54325 also has a proprietary circuit that enables the device to adapt 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 VCC input , and from 2.0-V to 18-V VIN input power supply voltage. The output voltage can be programmed between 0.76 V and 5.5 V. The device also features an adjustable slow start time and a power good function. The TPS54325 is available in the 14 pin HTSSOP package, and designed to operate from –40°C to 85°C.

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Same functionality and pinout but is not an equivalent to the compared device:
TPS54225 ACTIVE 4.5 V to 18 V input, 2 A synchronous step-down converter in HTSSOP package This product offers lower current (2 A).
TPS54425 ACTIVE 4.5V to 18V Input, 4A Synchronous Step-Down Converter This product offers higher current (4A).
Similar but not functionally equivalent to the compared device:
TPS563208 ACTIVE 4.5 V to 17 V input, 3 A output, synchronous step-down converter in FCCM mode Simplify design with minimum external component count.

Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet TPS54325 4.5-V to 18-V, 3-A Output Synchronous Step Down Switcher with Integrated FET datasheet (Rev. F) Nov. 23, 2014
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Selection guides Control-Mode Quick Reference Guide (Rev. A) Sep. 14, 2017
Application notes D-CAP2 Frequency Response Model, based on frequency domain analysis of Fixed On- Jan. 02, 2013
Application notes Understanding Thermal Dissipation and Design of a Heatsink May 04, 2011
Application notes Efficiency of synchronous versus nonsynchronous buck converters Oct. 04, 2009
User guides High Performance Synchronous Buck EVM Using the TPS54325 Jun. 24, 2009

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
25
Description
The TPS54325EVM (evaluation module) is designed for an input voltage of 5V to 17V and up to 3A output current. The TPS54325 is a single, adaptive on-time D-CAP2™ mode synchronous buck converter. System designers may use the TPS54325 to complete various end equipment dc/dc converters with a low (...)

Design tools & simulation

SIMULATION MODELS Download
SLIM285A.ZIP (41 KB) - PSpice Model
SIMULATION MODELS Download
SLVM200.ZIP (40 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SLVM201.TSC (168 KB) - TINA-TI Reference Design
SIMULATION TOOLS 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 document-generic User guide
REFERENCE DESIGNS Download
Universal AC 40W Set Top Box Power Supply (1.2V @ 3A)
PMP5411 This reference evaluation module is an example of complete power-trees inside a set-top-box.
It performs an AC-DC conversion, then, DC-DC conversions for 1.2V/1.8V/2.5V/3.3V/5V rails.
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Power Solution for Xilinx FPGA Zynq 7 (1.8V@0.15A)
PMP8251 This reference design featuring multiple of the TPS54325 and other TI power devices, is a complete power solution for Xilinx Zynq FPGA. From 12V input, this reference solution provides all the power rails required by Zynq FPGA including DDR3 memory.
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
12V Input, 1.8V-5V Adjustable Output at 3A, Sync Buck
PMP4246 — The PMP4246 reference design is configurable for a variety of output voltages ranging from 1.8V to 5V. This design uses the TPS54325 synchronous buck converter to step down from a 12V input source and provide up to 3A of output current. This design uses only ceramic capacitors for a compact and (...)
Design files

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 14 View options

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