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TPS56628

ACTIVE

4.5-V to 18-V, 6-A synchronous buck converter with eco-mode

Product details

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) (mA) 0.95 Switching frequency (min) (kHz) 650 Switching frequency (max) (kHz) 650 Features Enable, Light Load Efficiency, Power good, Soft Start Fixed, Synchronous Rectification Operating temperature range (°C) -40 to 85 Rating Catalog Regulated outputs (#) 1 Control mode D-CAP2 Duty cycle (max) (%) 85 Type Converter
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) (mA) 0.95 Switching frequency (min) (kHz) 650 Switching frequency (max) (kHz) 650 Features Enable, Light Load Efficiency, Power good, Soft Start Fixed, Synchronous Rectification Operating temperature range (°C) -40 to 85 Rating Catalog Regulated outputs (#) 1 Control mode D-CAP2 Duty cycle (max) (%) 85 Type Converter
HSOIC (DDA) 8 29.4 mm² 4.9 x 6
  • 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
  • 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

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.

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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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) 19 Nov 2013
EVM User's guide TPS56628 Buck Converter Evaluation Module User's Guide (Rev. A) PDF | HTML 25 Jun 2021

Design & development

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Evaluation board

TPS56628EVM-534 — TPS56628EVM-534 - 18V Input, 6-A Synchronous Step Down Converter Evaluation Module

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 (...)

User guide: PDF | HTML
Not available on TI.com
Simulation model

TPS56628 Unencrypted PSpice Transient Model Package (Rev. A)

SLVM964A.ZIP (25 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
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HSOIC (DDA) 8 View options

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