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TPS62743

ACTIVE

2V-5.5V input, ultra-low-power 300mA to 400mA step-down buck DCDC converter with 360nA Iq

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Data sheet

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TPS62843 ACTIVE 1.8V to 5.5V input, 600mA ultra-low IQ step-down converter Lower quiescent current alternative with more output voltage options
TPS62840 ACTIVE 60-nA quiescent current (IQ), 1.8-V to 6.5-VIN, high-efficiency 750-mA step-down converter Lower Iq of 60 nA and more output voltage options

TPS62743

ACTIVE
Data sheet Order now

Product details

Rating Catalog Topology Buck Iout (max) (A) 0.3 Vin (max) (V) 5.5 Vin (min) (V) 2 Vout (max) (V) 3.1, 3.3 Vout (min) (V) 1.2, 1.3 Features Adaptive/Dynamic Voltage Scaling, Enable, Light Load Efficiency, Light load efficiency, Output discharge, Synchronous Rectification Control mode Constant on-time (COT), DCS-Control Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.0000003 Duty cycle (max) (%) 100
Rating Catalog Topology Buck Iout (max) (A) 0.3 Vin (max) (V) 5.5 Vin (min) (V) 2 Vout (max) (V) 3.1, 3.3 Vout (min) (V) 1.2, 1.3 Features Adaptive/Dynamic Voltage Scaling, Enable, Light Load Efficiency, Light load efficiency, Output discharge, Synchronous Rectification Control mode Constant on-time (COT), DCS-Control Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.0000003 Duty cycle (max) (%) 100
DSBGA (YFP) 8 1.8 mm² (— mm × — mm)
  • Input voltage range VIN from 2.15 V to 5.5 V
  • Input voltage range down to 2.0 V once started
  • output current
    • TPS62743 300 mA
    • TPS627431 400 mA
  • 360-nA operational quiescent current
  • Up to 90% efficiency at 10-µA output current
  • Power save mode operation
  • Selectable output voltages
    • Eight voltage options between 1.2 V to 3.3 V
  • Output voltage discharge
  • Low output voltage ripple
  • Automatic transition to no ripple 100% mode
  • RF friendly DCS-Control™
  • Total solution size < 10 mm2
  • Small 1.6-mm × 0.9-mm, 8-ball WCSP package
  • Input voltage range VIN from 2.15 V to 5.5 V
  • Input voltage range down to 2.0 V once started
  • output current
    • TPS62743 300 mA
    • TPS627431 400 mA
  • 360-nA operational quiescent current
  • Up to 90% efficiency at 10-µA output current
  • Power save mode operation
  • Selectable output voltages
    • Eight voltage options between 1.2 V to 3.3 V
  • Output voltage discharge
  • Low output voltage ripple
  • Automatic transition to no ripple 100% mode
  • RF friendly DCS-Control™
  • Total solution size < 10 mm2
  • Small 1.6-mm × 0.9-mm, 8-ball WCSP package

The TPS62743 is a high efficiency step down converter with ultra low quiescent current of typical 360 nA. The device is optimized to operate with a 2.2-µH inductor and 10µF output capacitor. The device uses DCS-Control™ and operates with a typical switching frequency of 1.2 MHz. In Power Save Mode the device extends the light load efficiency down to a load current range of 10-µA and below. TPS62743 provides an output current of 300 mA. Once started the device operates down to an input voltage range of 2.0 V. This allows to operate the device directly from a single Li-MnO2 coin cell.

The TPS62743 provides 8 programmable output voltages between 1.2V and 3.3V selectable by three selection pins. The TPS62743 is optimized to provide a low output voltage ripple and low noise using a small output capacitor. Once the input voltage comes close to the output voltage the device enters the No Ripple 100% mode to prevent an increase of output ripple voltage. In this operation mode the device stops switching and turns the high side MOSFET switch on.

The TPS62743 is a high efficiency step down converter with ultra low quiescent current of typical 360 nA. The device is optimized to operate with a 2.2-µH inductor and 10µF output capacitor. The device uses DCS-Control™ and operates with a typical switching frequency of 1.2 MHz. In Power Save Mode the device extends the light load efficiency down to a load current range of 10-µA and below. TPS62743 provides an output current of 300 mA. Once started the device operates down to an input voltage range of 2.0 V. This allows to operate the device directly from a single Li-MnO2 coin cell.

The TPS62743 provides 8 programmable output voltages between 1.2V and 3.3V selectable by three selection pins. The TPS62743 is optimized to provide a low output voltage ripple and low noise using a small output capacitor. Once the input voltage comes close to the output voltage the device enters the No Ripple 100% mode to prevent an increase of output ripple voltage. In this operation mode the device stops switching and turns the high side MOSFET switch on.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet TPS62743TPS627431300/400 mA High Efficiency Buck Converter with Ultra-low Quiescent Current datasheet (Rev. B) PDF | HTML Mar 19, 2021
Technical article How to design wearables that are smaller and go longer between charges PDF | HTML Jan 5, 2024
Application note Quick Reference Guide To TI Buck Switching DC/DC Application Notes (Rev. B) PDF | HTML May 23, 2022
Selection guide Buck Converter Quick Reference Guide (Rev. B) Apr 8, 2021
White paper Extending Battery Life in Smart E-Locks (Rev. A) Jun 4, 2020
White paper Benefits of a Resistor-to-Digital Converter in Ultra-Low Power Supplies Oct 14, 2019
Analog design Journal Methods of output-voltage adjustment for DC/DC converters Jun 14, 2019
Analog design Journal Understanding 100% mode in low-power DC/DC converters Jun 22, 2018
Analog design Journal Achieving a clean startup by using a DC/DC converter with a precise enable-pin threshold Oct 24, 2017
Technical article Never lose your luggage again with a smart tracker design PDF | HTML Oct 20, 2017
Analog design Journal Testing tips for applying external power to supply outputs without an input voltage Oct 24, 2016
Test report Power Management Reference Design for a Wearable Device with Wireless Charging (Rev. A) PDF | HTML Apr 14, 2016
Analog design Journal Understanding frequency variation in the DCS-Control(TM) topology Oct 30, 2015

Design & development

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Evaluation board

TPS62743EVM-689 — TPS62743 Ultra Low Iq Step-Down Converter Evaluation Module

The TPS62743EVM-689 is designed to help the user easily evaluate and test the operation and functionality of the TPS62743. The EVM converts a 2.0-V to 5.5-V input voltage to a regulated output that is set between 1.2 V and 3.3 V at up to 300 mA. The TPS62743 comes in a small 1.6 x 0.9 mm² WCSP (...)

User guide: PDF
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Simulation model

TPS62743 PSpice Unencrypted Transient Model (Rev. A)

SLVMAU9A.ZIP (101 KB) - PSpice model
Supported products & hardware
Reference design

PMP11311 — Power Reference Design for a Wearable Device with Wireless Charging using the bq51003 and bq25120

Wearable devices require advanced power management to achieve long battery run times with always-on functionality.  Additionally, the devices need to use small rechargeable batteries and enable small footprint designs.  This application note shows the implementation of a scalable power (...)

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DSBGA (YFP) 8 Ultra Librarian
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