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TPS54329

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4.5V to 18V Input, 3A Synchronous Step-Down Converter with D-CAP2 Mode

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4.5V to 18V Input, 3A Synchronous Step-Down Converter with D-CAP2 Mode

TPS54329

ACTIVE
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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 Iq (Typ) (mA) 0.8 Switching frequency (Min) (kHz) 650 Switching frequency (Max) (kHz) 650 Features Enable, 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

HSOIC (DDA) 8 19 mm² 4.9 x 3.9 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 VIN Input Voltage Range: 4.5 V to 18 V
  • Output Voltage Range: 0.76 V to 7.0 V
  • Highly Efficient Integrated FETs Optimized
    for Lower Duty Cycle Applications
    – 100 mΩ (High Side) and 74 mΩ (Low Side)
  • High Efficiency, Less Than 10 µA at Shutdown
  • High Initial Bandgap Reference Accuracy
  • Adjustable Soft Start
  • Pre-Biased Soft Start
  • 650-kHz Switching Frequency (fSW)
  • Cycle By Cycle Over Current Limit
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Description

The TPS54329 is an adaptive on-time D-CAP2 mode synchronous buck converter. TheTPS54329 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 TPS54329 uses the D-CAP2 mode control which provides a fast transient response with no external compensation components. The TPS54329 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 7 V. The device also features an adjustable soft start time. The TPS54329 is available in the 8-pin DDA 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:
TPS54229 ACTIVE 4.5V to 18V Input, 2-A Synchronous Step-Down Converter Pin-to-pin compatible lower current product (2 A).
TPS54329E ACTIVE 4.5V to 18V Input, 3A Synchronous Step-Down Converter w/ D-CAP2 Mode and Light Load Efficiency This product has Eco-mode™ operation.
Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
TPS54325 ACTIVE 4.5V to 18V Input, 3A Synchronous Step-Down Converter Lower input voltage (18 V) and power-good functionality.
TPS54339 ACTIVE 4.5V to 23V Input, 3A Synchronous Step-Down Converter with D-CAP2 Mode This product has a higher input voltage up to 23 V.
Similar but not functionally equivalent to the compared device:
TPS54394 ACTIVE 3A Dual Channel Synchronous Step-Down Switcher with Integrated FET Dual 3-A output product with power-good functionality.

Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet 4.5V to 18V Input, 3A Synchronous Step-Down Converter datasheet (Rev. A) Mar. 23, 2012
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application notes D-CAP2 Frequency Response Model, based on frequency domain analysis of Fixed On- Jan. 02, 2013
User guides TPS54329EVM-056, 3-A, SWIFT™ Regulator Evaluation Module Oct. 21, 2011

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 TPS54329EVM-056 Evaluation Module (EVM) is a fully assembled and tested circuit for evaluating the TPS54329 Synchronous Step-Down SWIFT™ Converter with D-CAP2 Mode. The EVM operates from a 4.5V to 18V input and provides a 1.05V output at 3A.
Features
  • Vin = 4.5V to 18V
  • Iout = 3A
  • Vout = 1.05
  • D-CAP2 Control
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Design tools & simulation

SIMULATION MODELS Download
SLVMAX2A.ZIP (95 KB) - PSpice 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
  • (...)
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SO PowerPAD (DDA) 8 View options

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