High Efficiency Automotive Single Inductor Buck-Boost Converter with 4A Switch


Product details


Topology Buck-Boost Vin (Min) (V) 1.8 Vin (Max) (V) 5.5 Vout (Max) (V) 5.5 Vout (Min) (V) 1.2 Duty cycle (Max) (%) 100 Features Enable, Frequency Synchronization, Light Load Efficiency, Load Disconnect, Power Good, Synchronous Rectification, UVLO Fixed Switch current limit (Typ) (A) 4 Switching frequency (Min) (kHz) 2200 Switching frequency (Max) (kHz) 2600 Iq (Typ) (mA) 0.025 Rating Automotive Iout (Max) (A) 2 Operating temperature range (C) -40 to 125 open-in-new Find other Buck-boost, inverting & split-rail converters (integrated switch)

Package | Pins | Size

VSON (DSJ) 14 12 mm² 3 x 4 open-in-new Find other Buck-boost, inverting & split-rail converters (integrated switch)


  • Qualified for Automotive Applications
  • AEC-Q100 Qualified with the Following Results:
    • Device Temperature Grade: –40°C to 125°C
      Operating Junction Temperature Range
    • Device HBM ESD Classification Level H1B
    • Device CDM ESD Classification Level C4A
  • Input Voltage Range: 1.8 V to 5.5 V
  • Up to 96% Efficiency
  • 3 A Output Current at 3.3 V in Step Down Mode
    (VIN > 3.6 V)
  • More than 2 A Output Current at 3.3 V in Boost
    Mode (VIN > 2.5 V)
  • Automatic Transition Between Step Down and
    Boost Mode
  • Dynamic Input Current Limit
  • Device Quiescent Current less than 50 µA
  • Adjustable Output Voltage Range from 1.2 V to
    5.5 V
  • Power Save Mode for Improved Efficiency at
    Low Output Power
  • Forced Fixed Frequency Operation at 2.4 MHz
    and Synchronization Possible
  • Smart Power Good Output
  • Load Disconnect During Shutdown
  • Overtemperature Protection
  • Overvoltage Protection
  • Available in a 3-mm × 4-mm, VSON-14 Package
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The TPS63020-Q1 device provides a power supply solution for products powered by either a two-cell or three-cell alkaline, NiCd or NiMH battery, or a one-cell Li-Ion or Li-Polymer battery. Output currents can go as high as 3 A while using a single-cell Li-Ion or Li-Polymer battery, and discharge it down to 2.5 V or lower. The buck-boost converter is based on a fixed frequency, pulse width modulation (PWM) controller using synchronous rectification to obtain maximum efficiency. At low load currents, the converter enters power save mode to maintain high efficiency over a wide load current range. The power save mode can be disabled, forcing the converter to operate at a fixed switching frequency. The maximum average current in the switches is limited to a typical value of 4 A. The output voltage is programmable using an external resistor divider. The converter can be disabled to minimize battery drain. During shutdown, the load is disconnected from the battery. The device is packaged in a 3 mm × 4 mm 14-pin VSON PowerPAD™ package (DSJ).

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Technical documentation

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Type Title Date
* Data sheet TPS63020-Q1 High Efficiency Single Inductor Buck-Boost Converter With 4-A Switches datasheet (Rev. A) Dec. 28, 2015
Application note Layer Design for Reducing Radiated EMI of DC to DC Buck-Boost Converters (Rev. A) Jun. 09, 2021
Application note Different Methods to Drive LEDs Using TPS63XXX Buck-Boost Converters (Rev. C) Jul. 03, 2019
Application note Understanding Undervoltage Lockout in Power Devices (Rev. A) Sep. 19, 2018
Technical article Is a LiFePO4 or Lithium-ion battery better for eCall systems? Oct. 25, 2016
Technical article A complete low-voltage backup battery solution for eCall systems Mar. 05, 2016
Technical article Why do you need a 5.5Vin buck-boost in a car? Jan. 21, 2016
Application note TPS63020Q Pin FMEA Oct. 07, 2015
User guide TPS63020EVM-487 User's Guide Apr. 19, 2010

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

Buck-Boost Converter with 4A Switch Evaluation Module Board

The TPS63020EVM-487 evaluation module is a fully assembled and tested circuit for evaluating the TPS63020 Buck-Boost Converter with 4A Switch. The TPS63020EVM-487 operates from a 1.8V to 5.5V supply and provides a 3.3V output.
  • Input voltage: 1.8V to 5.5V
  • Adjustable Vout: 1.2V to 5.5V
  • Switch current rating 4A
  • Dynamic switch current limit
  • Efficiency: >93% over wide Vin range (max)
  • Package: 14-pin QFN , 3mm x 4 mm x 1 mm
  • Operating frequency: 2.4MHz, synchronizable (±20%)
  • Automatic transition between Step Down and Boost Mode
  • Very low (...)

Design tools & simulation

SLIM154.TSC (1688 KB) - TINA-TI Reference Design
SLIM155.ZIP (49 KB) - TINA-TI Spice 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
  • (...)
SLVC808A.ZIP (1889 KB)

Reference designs

Automotive eCall Power Supply Reference Design with Low Intermediate Voltage
PMP9769 This reference design includes a complete power management solution for a standalone emergency call (eCall) system in an automotive environment. The circuit is supplied directly from the car battery rail. It also manages a backup battery to power the eCall system while the car battery rail is not (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
VSON (DSJ) 14 View options

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