2.5-A high-efficient buck-boost converter with optimized load step response in tiny WCSP


Product details


Topology Buck-Boost Vin (Min) (V) 1.3 Vin (Max) (V) 5.5 Vout (Max) (V) 5.2 Vout (Min) (V) 1.8 Duty cycle (Max) (%) 100 Features Enable, Light Load Efficiency, Load Disconnect, Power Good, Pre-Bias Start-Up, Synchronous Rectification, UVLO Fixed Switch current limit (Typ) (A) 5.5 Switching frequency (Min) (kHz) 500 Switching frequency (Max) (kHz) 3100 Iq (Typ) (mA) 0.013 Rating Catalog Iout (Max) (A) 2.5 Operating temperature range (C) -40 to 125 open-in-new Find other Buck-boost, inverting & split-rail converters (integrated switch)

Package | Pins | Size

DSBGA (YFF) 15 0 mm² 2.295 x 1.384 open-in-new Find other Buck-boost, inverting & split-rail converters (integrated switch)


  • Three pin-to-pin device options: TPS63805, TPS63806, and TPS63807 with specific application focus
  • Input voltage range: 1.3 V to 5.5 V
    • Device input voltage > 1.8 V for start-up
  • Output voltage range: 1.8 V to 5.2 V (adjustable)
  • High efficiency over the entire load range
    • Power save mode and mode selection for forced PWM-mode
  • Peak current buck-boost mode architecture
    • Defined transition points between buck, buck-boost, and boost operation modes
    • Forward and reverse current operation
    • Start-up into pre-biased outputs
  • Safety and robust operation features
    • Integrated soft start
    • Overtemperature- and overvoltage-protection
    • True shutdown function with load disconnect
    • Forward and backward current limit
  • TPS63805
    • Optimized for smallest solution size of 18.5 mm2 (works with a 22-µF minimum output capacitor)
    • 2-A output current for VI ≥ 2.3 V, VO = 3.3 V
    • 11-µA operating quiescent current
  • TPS63806
    • Optimized for best load step response (180-mV load-step response at a 2 A current step)
    • Up to 2.5-A transient output current
    • 13-µA operating quiescent current
  • TPS63807
    • Optimized for smallest solution size of 18.5 mm2 (works with a 22-µF minimum output capacitor)
    • 2-A output current for VI ≥ 2.3 V, VO = 3.3 V
    • 11-µA operating quiescent current
    • Output discharge feature when EN is low
    • 480-µs Tramp for small inrush current during start-up
open-in-new Find other Buck-boost, inverting & split-rail converters (integrated switch)


The TPS63805, TPS63806, and TPS63807 are high efficiency, high output current buck-boost converters. Depending on the input voltage, they automatically operate in boost, buck, or in a novel 4-cycle buck-boost mode when the input voltage is approximately equal to the output voltage.

open-in-new Find other Buck-boost, inverting & split-rail converters (integrated switch)

Technical documentation

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Type Title Date
* Data sheet TPS6380x High-Efficiency, Low IQ Buck-Boost Converter with Small Solution Size datasheet (Rev. E) Aug. 26, 2021
Application note Different Methods to Drive LEDs Using TPS63XXX Buck-Boost Converters (Rev. D) Aug. 04, 2021
Application note Supercapacitor Backup Power Supply w/ Current Limit for Smart Electricity Meter (Rev. A) Aug. 03, 2021
Application note Selecting a DC/DC Converter for Maximum Battery Life in Pulsed-Load Applications (Rev. A) Jul. 26, 2021
Application note A Topical Index of TI Low-Power Buck-Boost Converter Application Notes (Rev. A) Jun. 09, 2021
Application note Layer Design for Reducing Radiated EMI of DC to DC Buck-Boost Converters (Rev. A) Jun. 09, 2021
Technical article Is there a universal tool for DC/DC voltage conversion? Sep. 30, 2019
Application note Improving Load Transient Response for Controlled Loads Sep. 12, 2019
User guide TPS63806EVM User's Guide Aug. 12, 2019
Application note Using Non-Inverting Buck-Boost Converter for Voltage Stabilization Aug. 01, 2019
Application note Buck-boost Converter Battery Life Time Estimation for Wireless Network Cameras (Rev. A) May 28, 2019
Application note Buck-Boost Converters Solving Power Challenges in Optical Modules May 13, 2019
Application note Precise Delayed Start-up with Precise Threshold Enable-pin Apr. 15, 2019
Application note Prevent Battery Overdischarge with Precise Threshold Enable Pin Apr. 02, 2019
Application note Selecting the right DC/DC converter for maximum battery life Feb. 08, 2019
Application note Supercapacitor backup power supply with TPS63802 Jan. 21, 2019
Application note Basic Calculations of a 4 Switch Buck-Boost Power Stage (Rev. B) Jul. 09, 2018
Application note Choosing an Appropriate Pull-up/Pull-down Resistor for Open Drain Outputs Sep. 19, 2011

Design & development

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Hardware development

document-generic User guide
The TPS63806EVM is designed to help the users easily evaluate and test the operation and functionality of the TPS63806 Buck-Boost Converter. The EVM operates from 1.3V to 5.5V input voltage. Output currents can go up to 2A in buck mode and boost mode. The user can easily evaluate the different (...)
  • Real buck- or boost-mode operation with automatic and seamless transition between modes
  • High efficiency from 500-μA to 2-A output current up to 96%
  • 13-μA operating quiescent current
  • True shutdown function with load disconnect
  • Power save mode with mode selection

Design tools & simulation

SLVMD58A.ZIP (75 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
  • (...)
SLVC808A.ZIP (1889 KB)

CAD/CAE symbols

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DSBGA (YFF) 15 View options

Ordering & quality

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