Tiny Low Input Voltage Boost Converter with Adjustable Output Voltage


Product details


Vin (Min) (V) 0.8 Vin (Max) (V) 4 Vout (Min) (V) 1.8 Vout (Max) (V) 4 Switch current limit (Typ) (A) 0.7 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 2500 Switching frequency (Max) (kHz) 2500 Iq (Typ) (mA) 0.029 Features Synchronous Rectification Duty cycle (Max) (%) 100 Operating temperature range (C) -40 to 85 Rating Catalog open-in-new Find other Boost converters (integrated switch)

Package | Pins | Size

WSON (DRV) 6 4 mm² 2 x 2 open-in-new Find other Boost converters (integrated switch)


  • Input Voltage Range from 0.8 V to 4.0 V
  • Up to 95% Efficiency
  • 100 mA Output Current at 3.3 Vout (VIN > 1 V)
  • Fixed and Adjustable Output Voltage Options from 1.8 V to 4.0 V
  • Programmable Average Output Current from 10 mA to 100 mA
  • Adjustable Output Current Limit for Smallest Inductor
  • Power Save Mode for Improved Efficiency at Low Output Power
  • 29-µA Quiescent Current
  • Advanced Softstart
  • Quasi Fixed Frequency Operation at 2.5 MHz
  • Output Overvoltage Protection
  • Load Disconnect During Shutdown
  • Undervoltage Lockout
  • Available in a 2.00 × 2.00 mm, 6-Pin WSON Package
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The TPS6126x devices provide a power supply solution for products powered by either single or dual cell alkaline, NiCd, or NiMH batteries. Its unique advanced softstart makes it also suitable for products powered by high output impedance battery types, like coin cells. Output currents can go as high as 100 mA while using a single cell alkaline battery, and discharge it down to 0.8 V or lower.

The boost converter is based on a quasi 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 ensure high efficiency over a wide load current range. The maximum average current in the switches is limited to a programmable value which can go as high as 700 mA. The output voltage is programmable using an external resistor divider, or is fixed internally on the chip. In addition, the average output current can be programmed as well. The converter then regulates the programmed output voltage or the programmed output current, which ever demands lower output power. The converter can be disabled to minimize battery drain. During shutdown, the load is disconnected from the battery. The device is packaged in a 6-pin WSON (DRV) package.

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Technical documentation

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Type Title Date
* Data sheet TPS6126x 0.8-V Input Synchronous Boost Converters with 100-mA Output Current datasheet (Rev. C) Apr. 23, 2018
Application note Performing Accurate PFM Mode Efficiency Measurements (Rev. A) Dec. 11, 2018
Application note QFN and SON PCB Attachment (Rev. B) Aug. 24, 2018
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Application note Calculating and Measuring the No Load Input Current of the Boost Converter Sep. 23, 2016
Application note Five Steps to a Good PCB Layout of the Boost Converter May 03, 2016
Application note Design of UVLO for LM27313 (Rev. B) Apr. 08, 2014
Technical article Efficiently dim your LED without a sense resistor Nov. 02, 2013
Application note Automated Frequency Response Analyzer Oct. 09, 2013
User guide TPS6126X User's Guide (Rev. B) Sep. 12, 2013
Application note Design considerations for a resistive feedback divider in a DC/DC converter Apr. 26, 2012
Application note IQ: What it is, what it isn’t, and how to use it Jun. 17, 2011
User guide TPS6126x, Low-Input Voltage, Boost Converter Evaluation Module Jun. 08, 2011

Design & development

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Hardware development

document-generic User guide

This user’s guide describes the TPS6126x evaluation module (EVM) and how to perform a stand-alone evaluation to allow the EVM to interface with the system and host. The TPS61260EVM-673 converter is programmed from the factory to deliver a 3.3-Vdc output voltage for a continuous load of up to (...)

  • Up to 95% Efficiency
  • More than 50 mA Output Current at 3.3 V (VIN > 0.9 V)
  • Input Voltage Range from 0.8 V to 4.0 V
  • Fixed and Adjustable Output Voltage Options from 1.8 V to 4.0 V
  • Programmable Average Output Current from 10 mA to 100 mA
  • Up to 700 mA Switch Current Rating
  • Power Save Mode for Improved (...)

Design tools & simulation

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
  • (...)
SLVC466.ZIP (191 KB)

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WSON (DRV) 6 View options

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