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TPS549A20 ACTIVE 1.5V to 20V (4.5V to 25V Bias) Input, 15A SWIFT™ Synchronous Step-Down Converter with PMBus™ This enhanced product offers a smaller QFN package with PMBus-enabled voltage scaling.

Product details


Vin (Min) (V) 4.5 Vin (Max) (V) 17 Vout (Min) (V) 0.6 Vout (Max) (V) 1.87 Iout (Max) (A) 12 Iq (Typ) (uA) 920 Switching frequency (Min) (kHz) 500 Switching frequency (Max) (kHz) 500 Features Adjustable Current Limit, Enable, Light Load Efficiency, Power Good, Pre-Bias Start-Up, Synchronous Rectification, Voltage Margining, Adaptive/Dynamic Voltage Scaling, Forced PWM, 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

HTSSOP (PWP) 24 34 mm² 7.7 x 4.4 open-in-new Find other Buck converters (integrated switch)


  • D-CAP2™ Control
    • Input Voltage Range: 4.5V to 17V
    • Switching Frequency: 500kHz
    • Optimized for a 1.0µH to 2.2µH Inductor
  • ±1% Output Voltage Accuracy
  • Features via I2C Compatible Interface
    • Output Voltage (VID): 0.6V to 1.87V in 10mV
    • Auto-Skip Eco-mode™ ON/OFF (Light-load)
    • Current Limit Target: 40% to 160%
    • Enabling IC, Reading-back Power-good
    • Hiccup Mode Protection ON/OFF
  • IC Terminal Features
    • Start-up by Using External Resistors
      Output Voltage with VFB Pin: 0.6V to 1.87V
    • Adjustable Soft-start,
      Monotonic Pre-Biased Start-up
    • Power-good
    • I2C Address Programming (2bits)
  • Cycle-by-Cycle Overcurrent Limiting Control
  • Thermal Shutdown (TSD)
  • Undervoltage Lockout (UVLO)
  • TSSOP Package (PWP) with PowerPAD™

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The TPS56X20 is a synchronous DC-DC converter IC (integrated circuit) with a voltage scaling control to power up micro-processors (MCUs) requiring core voltage (VCORE) tune-ups. After the initial power-up, the output voltage can be programmed/scaled by VID codes sent over an I2C compatible bus.

This step-down (buck) converter employs an adaptive on-time D-CAP2 mode control which provides a very fast transient response with no external components. Unlike traditional voltage-/current-mode controls, the D-CAP2 supports seamless transition between PWM mode for higher load and Eco-mode™ for light load. Eco-mode maintains high efficiency in light-load.

The TPS56X20 supports both ultra-low ESR ceramic capacitors and low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP. The device is optimized for a small 1.0µH to 2.2µH inductor saving PCB area.

The TPS56X20 devices are available in the HTSSOP package.

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Technical documentation

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Type Title Date
* Datasheet TPS56x20 4.5V to 17V Input, 12A/9A/7A/5A Output, Synchronous Step-Down Voltage Regulator with Voltage Scaling datasheet (Rev. E) Dec. 27, 2017
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application note A Practical Approach to Higher Output Voltage Applications for I2C Based DC/DC C Apr. 21, 2017
User guide TPS56C20-614, 12-A, SWIFT Regulator Evaluation Module Mar. 07, 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

The TPS56X20EVM-614 is an evaluation module for TPS56X20 series Step-Down voltage regulator family. This board supports four different output current converters TPS56520 (5A), TPS56720 (7A), TPS56920 (9A), and TPS56C20 (12A); the board is shipped with 12A version TPS56C20 mounted. By replacing IC (...)

  • D-CAP2™ Control with 500kHz Switching
  • Optimized for Small 1.0uH to 2.2uH Inductor
  • 4.5V to 17V Input Range
  • Voltage Scaling 0.6V to 1.87V in 10mV Step
  • +/- 1% Output Voltage Accuracy
  • Eco-mode™ for Light-load Efficiency
  • I2C Control for Vout, ON/OFF IC, Current-limit, and so on
  • IC Pin Configuration for (...)

Software development

SLVC555.ZIP (190672 KB)

Design tools & simulation

SLVMA65A.ZIP (89 KB) - PSpice Model
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 (...)
  • 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
HTSSOP (PWP) 24 View options

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