TPS56628

ACTIVE

4.5-V to 18-V, 6-A synchronous buck 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) 6 Iq (Typ) (uA) 950 Switching frequency (Min) (kHz) 650 Switching frequency (Max) (kHz) 650 Features Enable, Light Load Efficiency, Power Good, Synchronous Rectification, Soft Start Fixed 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 5.5 V
  • Highly Efficient Integrated FETs Optimized
    for Lower Duty Cycle Applications
    – 36 mΩ (High Side) and 28 mΩ (Low Side)
  • High Efficiency, less than 10 µA at shutdown
  • High Initial Bandgap Reference Accuracy
  • Pre-Biased Soft Start
  • 650-kHz Switching Frequency (fSW)
  • Cycle By Cycle Over Current Limit
  • Auto-Skip Eco-mode for High Efficiency at Light Load
  • Power Good Output
  • Fixed Soft Start: 1.0 ms
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Description

The TPS56628 is an adaptive on-time D-CAP2 mode synchronous buck converter. The TPS56628 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 TPS56628 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 TPS56628 to maintain high efficiency during lighter load conditions. The TPS56628 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 5.5 V. The TPS56628 is available in the 8-pin DDA package, and designed to operate from –40°C to 85°C.

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Same functionality with different pin-out to the compared device.
NEW TPS566231 ACTIVE 3-V to 18-V input, 6-A synchronous step-down voltage regulator with pulse skip mode Upgraded 6-A Eco-Mode converter product offering more efficiency in a smaller package.

Technical documentation

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Type Title Date
* Data sheet 4.5V to 18V Input, Synchronous Step-Down Converter with Advanced Eco-mode™ datasheet (Rev. A) Nov. 19, 2013
User guide TPS56628 Buck Converter Evaluation Module User's Guide (Rev. A) Jun. 25, 2021
Technical article Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019

Design & development

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Hardware development

EVALUATION BOARD Download
document-generic User guide
49
Description

The TPS56628 is a single, adaptive on-time, D-CAP2™ mode, synchronous buck converter requiring a 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 (...)

Features
  • Input voltage range 4.5V to 18V
  • Adjustable output voltage down to 0.76V
  • Easy to use D-CAP2™ control
  • Eco-mode™ for high efficiency in light load condition
  • 650kHz switching frequency
  • Power-good output
  • Hiccup current limit

Design tools & simulation

SIMULATION MODEL Download
SLVM964A.ZIP (25 KB) - PSpice Model
SIMULATION TOOL 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
  • (...)

CAD/CAE symbols

Package Pins Download
SO PowerPAD (DDA) 8 View options

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