2-A, high-efficient, 11-µA quiescent current buck-boost converter with tiny solution size


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 Switching frequency (Min) (kHz) 500 Switching frequency (Max) (kHz) 3100 Iq (Typ) (mA) 0.011 Rating Catalog 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

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


  • Two pin-2-pin device options, TPS63805 and TPS63806 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
    • Low operating quiescent current
    • 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

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


The TPS63805 and TPS63806 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. The transitions between modes happen at defined thresholds and avoid unwanted toggling within the modes to reduce output voltage ripple. The device output voltages are individually set by a resistive divider within a wide output voltage range.The TPS63805 achieves the lowest solution size with a tiny bill of materials. An 11-µA quiescent current enables the highest efficiency for little to no-load conditions.

The TPS63806 is optimized for applications where the load-step response under a heavy load profile is a concern.

The TPS63805 and TPS63806 come in a 1.4 mm x 2.3 mm package. The device works with tiny passive components to keep the overall solution size small.

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

Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet TPS6380x High-efficient, Low IQ Buck-boost Converter with Small Solution Size datasheet (Rev. C) Oct. 02, 2019
Application notes A Topical Index of TI Low-Power Buck-Boost Converter Application Notes May 11, 2020
Application notes Layer Design for Reducing Radiated EMI of DC to DC Buck-Boost Converters Apr. 22, 2020
Application notes Supercapacitor Backup Power Supply w/ Current Limit for Smart Electricity Meter Oct. 31, 2019
Technical articles Is there a universal tool for DC/DC voltage conversion? Sep. 30, 2019
Application notes Improving Load Transient Response for Controlled Loads Sep. 12, 2019
Application notes Using Non-Inverting Buck-Boost Converter for Voltage Stabilization Aug. 01, 2019
Application notes Different Methods to Drive LEDs Using TPS63XXX Buck-Boost Converters (Rev. C) Jul. 03, 2019
Application notes Buck-boost Converter Battery Life Time Estimation for Wireless Network Cameras (Rev. A) May 28, 2019
Application notes Buck-Boost Converters Solving Power Challenges in Optical Modules May 13, 2019
Application notes Precise Delayed Start-up with Precise Threshold Enable-pin Apr. 15, 2019
Application notes Prevent Battery Overdischarge with Precise Threshold Enable Pin Apr. 02, 2019
User guides TEC driver reference design for 3.3-V inputs Mar. 27, 2019
Application notes Selecting the right DC/DC converter for maximum battery life Feb. 08, 2019
Application notes Supercapacitor backup power supply with TPS63802 Jan. 21, 2019
Application notes Performing Accurate PFM Mode Efficiency Measurements (Rev. A) Dec. 11, 2018
Application notes Selecting a DC/DC Converter for Maximum Battery Life in Pulsed-Load Applications Nov. 28, 2018
Application notes Understanding Undervoltage Lockout in Power Devices (Rev. A) Sep. 19, 2018
Application notes Basic Calculations of a 4 Switch Buck-Boost Power Stage (Rev. B) Jul. 09, 2018
User guides TPS63805EVM-026 Evaluation Module User's Guide Mar. 08, 2018
Application notes Extending the Soft Start Time in the TPS63010 Buck-Boost Converter Dec. 05, 2012
Application notes Design considerations for a resistive feedback divider in a DC/DC converter Apr. 26, 2012
Application notes Choosing an Appropriate Pull-up/Pull-down Resistor for Open Drain Outputs Sep. 19, 2011
Application notes IQ: What it is, what it isn’t, and how to use it Jun. 17, 2011

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 TPS63805EVM-026 is designed to help the users easily evaluate and test the operation and functionality of the TPS63805 Buck-Boost Converter. The EVM operates from 1.3-V to 5.5-V input voltage. Output currents can go up to 2 A in buck mode and boost mode. The user can easily evaluate the (...)
  • 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%
  • 11-μA Operating Quiescent Current
  • True Shutdown Function with Load Disconnect
  • Power Save Mode With Mode Selection

Software development


Design tools & simulation

SLVMCQ6B.ZIP (50 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)

Reference designs

TEC driver reference design for 3.3V inputs
TIDA-050017 Many electronic components require their temperature to be regulated for best performance and for longer operating life times. Precise temperature control down to 0.1°C is critical for certain applications such as laser diodes used in optical modules, where even a 1°C change in temperature (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
DSBGA (YFF) 15 View options

Ordering & quality

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