TPS54326

ACTIVE

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

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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 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 700 Switching frequency (Max) (kHz) 700 Features Enable, Light Load Efficiency, Power Good, Synchronous Rectification, Soft Start Adjustable Control mode D-CAP2 Duty cycle (Max) (%) 90 Type Converter Operating temperature range (C) -40 to 85 Rating Catalog 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

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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.

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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

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
$25.00
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

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

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