2-A, high-efficient, 11-µA quiescent current buck-boost converter in QFN/DFN package


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)

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  • 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)
  • 2-A output current for VI ≥ 2.3 V, VO = 3.3 V
  • High efficiency over the entire load range
    • 11-µA 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
  • Small solution size of 21.5 mm2
    • Tiny SON/DFN package (similar to QFN)
    • Small 0.47-µH inductor
    • Works with a 22-µF minimum output capacitor
  • Create a custom design using the TPS63802 with the WEBENCH Power Designer

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


The TPS63802 is a high efficiency, high output current buck-boost converter. Depending on the input voltage, it automatically operates 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. An 11-µA quiescent current enables the highest efficiency for little to no-load conditions.

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

Technical documentation

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Type Title Date
* Data sheet TPS63802 2-A, High-efficient, Low IQ Buck-boost Converter in DFN Package datasheet (Rev. D) Jan. 04, 2021
Application note A Topical Index of TI Low-Power Buck-Boost Converter Application Notes May 11, 2020
Application note Layer Design for Reducing Radiated EMI of DC to DC Buck-Boost Converters Apr. 22, 2020
Application note Supercapacitor Backup Power Supply w/ Current Limit for Smart Electricity Meter Oct. 31, 2019
User guide TPS63802 Multipurpose EVM Oct. 21, 2019
Technical article Is there a universal tool for DC/DC voltage conversion? Sep. 30, 2019
User guide TPS63802EVM (Rev. B) Sep. 24, 2019
Application note Improving Load Transient Response for Controlled Loads Sep. 12, 2019
Application note Using Non-Inverting Buck-Boost Converter for Voltage Stabilization Aug. 01, 2019
Technical article Deciphering low Iq: Using WEBENCH® to design near 100% duty-cycle for ultra-low power applications Jul. 15, 2019
Application note Different Methods to Drive LEDs Using TPS63XXX Buck-Boost Converters (Rev. C) Jul. 03, 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
User guide TEC driver reference design for 3.3-V inputs Mar. 27, 2019
Application note Selecting the right DC/DC converter for maximum battery life Feb. 08, 2019
Technical article How to prevent battery over discharge by using a precise threshold voltage enable pin Jan. 31, 2019
Application note Supercapacitor backup power supply with TPS63802 Jan. 21, 2019
Application note Selecting a DC/DC Converter for Maximum Battery Life in Pulsed-Load Applications Nov. 28, 2018
Application note Basic Calculations of a 4 Switch Buck-Boost Power Stage (Rev. B) Jul. 09, 2018

Design & development

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Hardware development

document-generic User guide
The TPS63802EVM is designed to help the users easily evaluate and test the operation and functionality of the TPS63802 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 2A output current up to 96%
  • 11-μA operating quiescent current
  • True shutdown function with load disconnect
  • Power save mode with mode selection
document-generic User guide

The TPS63802HDKEVM is a universal development tool designed to help the users easily and quickly evaluate and test the most common buck-boost converter use-cases. The use-cases include backup power, input current limit, LED driver, digital voltage scaling, bypass mode and precise enable. The user (...)

  • Universal Tool to test most common buck-boost converter use-cases
  • Use-cases: backup power, input current limit, LED driver, digital voltage scaling, bypass mode and precise enable
  • Change quickly between use-cases without soldering
  • All use-cases are tested and the user guide includes quick-start (...)

Software development


Design tools & simulation

SLVMCX1C.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
Supercapacitor backup power supply with current limit and active cell balancing reference design
PMP30693 — This reference design automatically provides a back-up voltage during a power interruption. It manages the charging of supercapitors and provides reverse blocking protection. The maximum supercapacitor charging current and voltage can be adjusted. When the input voltage fails a buck-boost converter (...)
document-generic Schematic document-generic User guide
Efficient, high-current, linear LED driver reference design for SpO2 and other medical applications
TIDA-010043 — This reference design provides a protected, efficient (headroom-controlled), high-current (up to 1.5 A), linear (accurate and fast) light-emitting diode (LED) driver reference design to enable peripheral capillary oxygen saturation (SpO2) and other medical applications. A typical SpO2 application (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

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