TPS54326

ACTIVE

4.5V to 18V Input, 3A Synchronous Step-Down Converter with Eco-Mode™

Top

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 Switching frequency (Min) (kHz) 700 Switching frequency (Max) (kHz) 700 Features Enable, Light Load Efficiency, 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 VQFN (RGT) 16 9 mm² 3 x 3 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 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
  • Auto-Skip Eco-mode™ for High Efficiency at Light Load
  • High Initial Bandgap Reference Accuracy
  • Adjustable Soft Start
  • Pre-Biased Soft Start
  • 700-kHz Switching Frequency (fSW)
  • Cycle-By-Cycle Overcurrent 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-CAP2 Is a trademark of Texas InstrumentsPower
PAD Is a trademark of Texas InstrumentsPower

open-in-new Find other Buck converters (integrated switch)

Description

The TPS54326 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54326 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 TPS54326 uses the D-CAP2™ mode control which provides a fast transient response with no external components. The adoptive on-time control supports seamless operation between PWM mode at heavy load condition and reduced frequency Eco-mode operation at light load for high efficiency.

The TPS54326 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-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 TPS54326 is available in the 14 pin HTSSOP or 16 pin QFN package, and designed to operate from –40°C to 85°C.

open-in-new Find other Buck converters (integrated switch)
Download
Similar products you might be interested in
open-in-new Compare products
Same functionality and pinout but is not an equivalent to the compared device:
TPS54226 ACTIVE 4.5V to 18V Input, 2A Synchronous Step-Down Converter with Eco-Mode™ This product offers lower current (2A).
TPS54426 ACTIVE 4.5V to 18V Input, 4A Synchronous Step-Down Converter with Eco-Mode™ This product offers higher current (4A).
Similar but not functionally equivalent to the compared device:
TPS563201 ACTIVE 4.5 V to 17 V input, 3 A output, synchronous step-down converter in Eco-mode Simplify design with minimum external component count.

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 7
Type Title Date
* Datasheet 4.5V to 18V Input, 3-A Synchronous Step-Down Converter with Eco-mode datasheet (Rev. E) Jun. 06, 2012
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Selection guides SWIFT DC/DC Converters Selector Guide (Rev. G) Feb. 06, 2019
Technical articles Keeping DC/DC solutions (super) simple for cost-sensitive applications Oct. 18, 2016
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
User guides TPS54326EVM-540 3-A, SWIFT(TM) Regulator Evaluation Module Nov. 17, 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 TPS54326 is a single, adaptive on-time D-CAP2™ mode synchronous buck converter requiring a very low external component count. The D-CAP2™ control circuit is optimized for low ESR output capacitors such as POSCAP, SP-CAP or ceramic types and features fast transient response with no external (...)

Design tools & simulation

SIMULATION MODELS Download
SLIM296A.ZIP (41 KB) - PSpice Model
SIMULATION MODELS Download
SLVM263.TSC (211 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SLVM264.ZIP (40 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SLVM731.ZIP (15 KB) - IBIS Model
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

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 14 View options
VQFN (RGT) 16 View options

Ordering & quality

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos

Related videos