TPS54328

ACTIVE

4.5V to 18V Input, 3-A 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) 7 Iout (Max) (A) 3 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 700 Switching frequency (Max) (kHz) 700 Features Enable, Light Load Efficiency, Synchronous Rectification, Soft Start Adjustable Control mode D-CAP2 Duty cycle (Max) (%) 65 Type Converter Operating temperature range (C) -40 to 85 Rating Catalog open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HSOIC (DDA) 8 19 mm² 4.9 x 3.9 VSON (DRC) 10 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 Input Voltage Range: 4.5 V to 18 V
  • Output Voltage Range: 0.76 V to 7 V
  • Highly Efficient Integrated FETs Optimized for Lower Duty Cycle Applications
    • 100 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 Overcurrent Limit
  • Auto-Skip Eco-Mode™ for High Efficiency at Light Load
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Description

The TPS54328 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54328 enables system designers to complete the suite of various end-equipment power bus regulators with a cost effective, low component count, low standby current solution. The main control loop for the TPS54328 uses the D-CAP2 mode control that provides a fast transient response with no external compensation components.

The adaptive on-time control supports seamless transition between PWM mode at higher load conditions and Eco-mode operation at light loads. Eco-mode allows the TPS54328 to maintain high efficiency during lighter load conditions. The TPS54328 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 input (VIN).

The output voltage can be programmed from 0.76 V to 7 V. The device also features an adjustable soft start time. The TPS54328 is available in 8-pin DDA and 10-pin DRC packages, and is designed to operate over the ambient temperature range of –40°C to 85°C.

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Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
TPS563201 ACTIVE 4.5 V to 17 V input, 3 A output, synchronous step-down converter in Eco-mode This product has a smaller package with less external component count.
Same functionality and pinout but is not an equivalent to the compared device:
TPS54228 ACTIVE 4.5V to 18V Input, 2-A Synchronous Step-Down Converter with Eco-mode™ Pin-to-pin compatible lower current product (2 A).
TPS54428 ACTIVE 4.5V to 18V Input, 4-A Synchronous Step-Down SWIFT™ Converter with Eco-mode™ Pin-to-pin compatible higher current product (4 A).

Technical documentation

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Type Title Date
* Datasheet TPS54328 4.5-V to 18-V Input, 3-A Synchronous Step-Down Converter With Eco-Mode™ datasheet (Rev. D) Aug. 17, 2016
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application notes Optimize Output Filter on D-CAP2 for Stability Improvement Jun. 13, 2017
Application notes D-CAP2 Frequency Response Model, based on frequency domain analysis of Fixed On- Jan. 02, 2013
Selection guides Power Management Solutions Set-Top Box and Digital TV (Rev. A) Apr. 18, 2012
User guides TPS54328EVM-686 3-A, SWIFT Regulator Evaluation Module Dec. 15, 2010

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 TPS54328EVM-686 is a fully assembled and tested circuit for evaluating the TPS54328 Synchronous Step-Down SWIFT Converter. The TPS54328EVM-686 operates from a 4.5V to 18V input and provides a 1.05V output at 3A.
Features
  • D-CAP2 Mode Enables Fast Transient Response
  • Low Output Ripple and Allows Ceramic Output Capacitor
  • Wide Vin Input Voltage Range: 4.5V to 18V
  • Output Voltage Range: 0.76 V to 5.5 V
  • Highly Efficient Integrated FETs Optimized for Lower Duty Cycle Applications
  • High Efficiency, less than 10uA at shutdown
  • High (...)

Design tools & simulation

SIMULATION MODELS Download
SLVM109A.ZIP (41 KB) - PSpice Model
SIMULATION MODELS Download
SLVM338.TSC (652 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SLVM339.ZIP (39 KB) - TINA-TI Spice Model

CAD/CAE symbols

Package Pins Download
SO PowerPAD (DDA) 8 View options
VSON (DRC) 10 View options

Ordering & quality

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