TPS62743

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

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Product details

Parameters

Vin (Min) (V) 2 Vin (Max) (V) 5.5 Vout (Min) (V) 1.2 Vout (Max) (V) 3.3 Iout (Max) (A) 0.3 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 1200 Switching frequency (Max) (kHz) 1200 Features Enable, Light Load Efficiency, Output Discharge, Synchronous Rectification, Adaptive/Dynamic Voltage Scaling Control mode Constant on-time (COT), DCS-Control Duty cycle (Max) (%) 100 Type Converter Operating temperature range (C) -40 to 85 Rating Catalog open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

DSBGA (YFP) 8 0 mm² 1.602 x .906 open-in-new Find other Buck converters (integrated switch)

Features

  • 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 400mA
  • 360 nA Operational Quiescent Current
  • Up to 90% Efficiency at 10-µA Output Current
  • Power Save Mode Operation
  • Selectable Output Voltages
    • 8 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 <10mm2
  • Small 1.6 mm × 0.9 mm, 8 Ball WCSP Package

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Description

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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Type Title Date
* Datasheet TPS62743 Tiny Ultra Low Quiescent Current Buck Converter datasheet (Rev. A) May 03, 2016
Selection guides Buck Converter Quick Reference Guide (Rev. A) Mar. 31, 2020
White papers Benefits of a Resistor-to-Digital Converter in Ultra-Low Power Supplies Oct. 14, 2019
Application notes Methods of output-voltage adjustment for DC/DC converters Jun. 14, 2019
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application notes Understanding 100% mode in low-power DC/DC converters Jun. 22, 2018
Application notes A Topical Index of TI Low Power Buck DC/DC Application Notes Jan. 17, 2018
Application notes Achieving a clean startup by using a DC/DC converter with a precise enable-pin t Oct. 24, 2017
Technical articles Never lose your luggage again with a smart tracker design Oct. 20, 2017
Selection guides Low-Power DC/DC Converter Overview Guide (Rev. D) Feb. 09, 2017
White papers Extending battery life in smart locks Nov. 09, 2016
Application notes Testing tips for applying external power to supply outputs without an input volt Oct. 24, 2016
Selection guides Ultra-Low-Power DC/DC Converters for Battery-Powered and Energy-Harvesting Apps (Rev. B) May 04, 2016
User guides Power Management Reference Design for a Wearable Device with Wireless Charging (Rev. A) Apr. 14, 2016
Selection guides DC/DC converters with DCS-Control topolgy selection guide (Rev. A) Mar. 17, 2016
User guides TPS62743EVM-689 Evaluation Module User's Guide (Rev. A) Jan. 28, 2016
Application notes Understanding frequency variation in the DCS-Control(TM) topology Oct. 30, 2015
Technical articles How to design wearables that are smaller and go longer between charges Oct. 01, 2015
Technical articles Turn three knobs to power any ultra-low power system Jul. 09, 2015

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$49.00
Description

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 (...)

Features
  • 360nA Typical Quiescent Current
  • Up to 90% Efficiency at 10uA Output Current
  • RF Friendly DCS-Control
  • Total Sulution Size  <11mm²
  • Small 1.6 x 0.9 mm², 0.5mm Hight, 8 Ball, 0.4mm Pitch WCSP Package

Design tools & simulation

SIMULATION MODELS Download
SLVMAU9.ZIP (116 KB) - PSpice Model

Reference designs

REFERENCE DESIGNS Download
Power Reference Design for a Wearable Device with Wireless Charging using the bq51003 and bq25120
PMP11311 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 (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
0.8V-4.2Vin to 3.3V@100mA Boost+Buck Reference Design
PMP21055 — The PMP21055 reference design converts a 0.8V to 4.2V input to a 3.3V/100mA output in a small form factor measuring 12mmx8mm. The design is built on a 2 layer, 1oz board and is a low-cost, small size design intended for battery powered applications. 
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
DSBGA (YFP) 8 View options

Ordering & quality

Support & training

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