TPS54A20

ACTIVE

Small, 10MHz 10A, 8V to 14V Input, SWIFT Series Capacitor Step-Down Converter

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Product details

Parameters

Vin (Min) (V) 8 Vin (Max) (V) 14 Vout (Min) (V) 0.5 Vout (Max) (V) 2 Iout (Max) (A) 10 Iq (Typ) (mA) 5 Switching frequency (Min) (kHz) 4000 Switching frequency (Max) (kHz) 10000 Features Adjustable Current Limit, Enable, Frequency Synchronization, Phase Interleaving, Power Good, Pre-Bias Start-Up, Synchronous Rectification, UVLO Adjustable Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

VQFN-HR (RNJ) 20 14 mm² 4 x 3.5 open-in-new Find other Buck converters (integrated switch)

Features

  • Two-phase, Synchronous Series Capacitor Buck
    Converter
  • Automatic Current Balancing Between Phases
  • 2-MHz to 5-MHz Per Phase Switching Frequency
  • 14-ns Minimum On-Time
  • 0.51-V to 2-V Output Voltage Range with ±0.5%
    Feedback Reference Voltage
  • Input Overvoltage Lockout for 17-V Surge
    Protection
  • Adjustable Current Limit with Auto Restart
    (Hiccup)
  • Synchronizes to an External Clock
  • Fixed Frequency in Steady State
  • Adaptive On-Time Control
  • Internal Feedback Loop Compensation
  • Internal Gate Drive LDO with External Supply
    Option
  • EN Pin Allowing for Adjustable Input UVLO
  • Selectable Soft-Start Time
  • Monotonic Startup with Pre-biased Output
  • Output Power Good Indicator (Open Drain)
  • Output Overvoltage/Undervoltage Protection
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Description

The TPS54A20 is a two-phase, synchronous series capacitor buck converter designed for small size, low voltage applications from a 12-V input rail. This topology uniquely merges a switched capacitor circuit with a two phase buck converter. Advantages include automatic current balancing between the inductors, lower switching losses which enable high frequency (HF) operation, and voltage step-down through the series capacitor. Small, low profile inductors used with the TPS54A20 significantly reduce total solution area and height. An adaptive on-time control architecture provides fast transient response and accurate voltage regulation at up to 10-MHz operating frequency. Fixed frequency operation during steady state is maintained through the use of a phase lock loop (PLL) to lock switching signals to a reference oscillator.

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Technical documentation

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Type Title Date
* Datasheet TPS54A20 8-V to 14-V Input, 10-A, up to 10-MHz SWIFT Step Down Converter datasheet (Rev. A) Apr. 07, 2016
Selection guides Buck Converter Quick Reference Guide (Rev. A) Mar. 31, 2020
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
User guides TPS54A20EVM-770 10-A, SWIFT™ Regulator Evaluation Module (Rev. A) Mar. 06, 2019
Application notes Using a high‐freq. switching regulator w/o a linear reg. to power a data‐convert Sep. 24, 2018
More literature Common Mistakes in DC/DC Converters and How to Fix Them Feb. 14, 2018
More literature Design of Multi-MHz Series Capacitor Buck Converters Used As Voltage Regulators Jan. 31, 2018
Selection guides Control-Mode Quick Reference Guide (Rev. A) Sep. 14, 2017
Application notes Saving board space with a low-profile series-capacitor buck converter Oct. 24, 2016
Technical articles The world of tomorrow, today: A look inside Kilby Labs Sep. 12, 2016
More literature Design of a high-frequency series capacitor buck converter Aug. 17, 2016
Technical articles Step by step: How the series capacitor buck converter works Aug. 15, 2016
Technical articles Preoccupied with power problems? Read 5 ways we’re helping solve them Jun. 23, 2016
Application notes Introduction to the Series Capacitor Buck Converter (Rev. A) May 24, 2016
White papers Breakthrough power delivery for space-constrained applications May 13, 2016
User guides TPS54A20EVM-770 10-A, SWIFT™ Regulator Evaluation Module Dec. 14, 2015

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
$49.00
Description

TPS54A20EVM-770 is a 10 A synchronous dual phase converter evaluation module (EVM).  The EVM generates a 1.2 V output voltage froma a nominal 12 V input.  The input voltage range is 9.2 V to 14 V with a minimum start up voltage of 9.4 V.  The circuit is set upfor default operation of (...)

Features
  • 9.2 V to 14 V input voltage
  • 2 Mhz per phase operation
  • 10 A output current
  • Unique series capacitor topology
  • Adaptive on time control

Design tools & simulation

SIMULATION MODELS Download
SLVMBF2.ZIP (583 KB) - PSpice Model

Reference designs

REFERENCE DESIGNS Download
Three Different Buck Converter Circuits to Convert 12V to 1.2V at >6A Load Current Reference Design
PMP11438 PMP11438 is a vehicle used to compare three different power solutions for converting a 12V bus to 1.2V at 6-10A. The 1.2V output voltage is applicable to DDR4 memory applications. Each solution offers an advantage in either full load efficiency, light load efficiency, density, height, transient (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Tiny, Low Profile 10 A Point-of-load Voltage Regulator Reference Design
PMP15008 — The PMP15008 reference design is a small, high frequency point-of-load voltage regulator. A unique converter topology enables high efficiency while operating at 2 MHz per phase. This design is targeted at applications like processor or memory power with an 8 V to 14 V input and 0.5 V to 2 V, up (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
VQFN-HR (RNJ) 20 View options

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