TPS61261

ACTIVE

Tiny Low Input Voltage Boost Converter with 3.3 Output Voltage

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Boost Type Converter Vin (min) (V) 0.8 Vin (max) (V) 4 Switching frequency (min) (kHz) 2500 Switching frequency (max) (kHz) 2500 Features Synchronous Rectification Vout (min) (V) 3.3 Vout (max) (V) 3.3 Iq (typ) (µA) 29 Duty cycle (max) (%) 100 Switch current limit (typ) (A) 0.7
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Boost Type Converter Vin (min) (V) 0.8 Vin (max) (V) 4 Switching frequency (min) (kHz) 2500 Switching frequency (max) (kHz) 2500 Features Synchronous Rectification Vout (min) (V) 3.3 Vout (max) (V) 3.3 Iq (typ) (µA) 29 Duty cycle (max) (%) 100 Switch current limit (typ) (A) 0.7
WSON (DRV) 6 4 mm² 2 x 2
  • 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
  • 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

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.

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) PDF | HTML 23 Apr 2018
Application note QFN and SON PCB Attachment (Rev. C) PDF | HTML 06 Dec 2023
Application note Performing Accurate PFM Mode Efficiency Measurements (Rev. A) 11 Dec 2018
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note Five Steps to a Good PCB Layout of the Boost Converter PDF | HTML 03 May 2016
Application note Design of UVLO for LM27313 (Rev. B) 08 Apr 2014
User guide TPS6126X User's Guide (Rev. B) 12 Sep 2013
Analog Design Journal IQ: What it is, what it isn’t, and how to use it 17 Jun 2011
User guide TPS6126x, Low-Input Voltage, Boost Converter Evaluation Module 08 Jun 2011

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

TPS61260EVM-673 — Evaluation Module for TPS61260 Tiny Low Input Voltage Boost Converter with Adjustable Output Voltage

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 (...)

User guide: PDF
Not available on TI.com
Evaluation board

TPS61261EVM-208 — TPS61261EVM-208 Tiny Low Input Voltage Boost Converter Evaluation Module Board

Tiny Low Input Voltage Boost (Step-Up) Converter Evaluation Module Board - Step Up

This describes the characteristics, operation, and use of the Texas Instruments TPS61261 evaluation module (EVM). This EVM is designed to help the user easily evaluate and test the operation and functionality of the (...)
User guide: PDF
Not available on TI.com
Gerber file

TPS61260EVM-673 Gerbers

SLVC466.ZIP (191 KB)
Package Pins CAD symbols, footprints & 3D models
WSON (DRV) 6 Ultra Librarian

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