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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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Same functionality with different pin-out to the compared device
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
TPS62843 PREVIEW 1.8-V to 5.5-V input, 600-mA ultra-low IQ step-down converter in WCSP Lower quiescent current alternative with more output voltage options

TPS62743

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 2 Vin (max) (V) 5.5 Vout (min) (V) 1.2, 1.3 Vout (max) (V) 3.1, 3.3 Iout (max) (A) 0.3 Iq (typ) (mA) 0.0003 Switching frequency (min) (kHz) 1200 Switching frequency (max) (kHz) 1200 Features Adaptive/Dynamic Voltage Scaling, Enable, Light load efficiency, Output discharge, Synchronous Rectification Operating temperature range (°C) -40 to 85 Rating Catalog Regulated outputs (#) 1 Control mode Constant on-time (COT), DCS-Control Duty cycle (max) (%) 100 Type Converter
Vin (min) (V) 2 Vin (max) (V) 5.5 Vout (min) (V) 1.2, 1.3 Vout (max) (V) 3.1, 3.3 Iout (max) (A) 0.3 Iq (typ) (mA) 0.0003 Switching frequency (min) (kHz) 1200 Switching frequency (max) (kHz) 1200 Features Adaptive/Dynamic Voltage Scaling, Enable, Light load efficiency, Output discharge, Synchronous Rectification Operating temperature range (°C) -40 to 85 Rating Catalog Regulated outputs (#) 1 Control mode Constant on-time (COT), DCS-Control Duty cycle (max) (%) 100 Type Converter
DSBGA (YFP) 8 1.8 mm² 1 x 1.8
  • 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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Type Title Date
* Data sheet TPS62743TPS627431300/400 mA High Efficiency Buck Converter with Ultra-low Quiescent Current datasheet (Rev. B) PDF | HTML 19 Mar 2021
Application note Quick Reference Guide To TI Buck Switching DC/DC Application Notes (Rev. B) PDF | HTML 23 May 2022
Selection guide Buck Converter Quick Reference Guide (Rev. B) 08 Apr 2021
White paper Extending Battery Life in Smart E-Locks (Rev. A) 04 Jun 2020
White paper Benefits of a Resistor-to-Digital Converter in Ultra-Low Power Supplies 14 Oct 2019
Analog Design Journal Methods of output-voltage adjustment for DC/DC converters 14 Jun 2019
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Analog Design Journal Understanding 100% mode in low-power DC/DC converters 22 Jun 2018
Analog Design Journal Achieving a clean startup by using a DC/DC converter with a precise enable-pin t 24 Oct 2017
Technical article Never lose your luggage again with a smart tracker design 20 Oct 2017
Analog Design Journal Testing tips for applying external power to supply outputs without an input volt 24 Oct 2016
Test report Power Management Reference Design for a Wearable Device with Wireless Charging (Rev. A) PDF | HTML 14 Apr 2016
EVM User's guide TPS62743EVM-689 Evaluation Module User's Guide (Rev. A) 28 Jan 2016
Analog Design Journal Understanding frequency variation in the DCS-Control(TM) topology 30 Oct 2015
Technical article How to design wearables that are smaller and go longer between charges 01 Oct 2015
Technical article Turn three knobs to power any ultra-low power system 09 Jul 2015

Design & development

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

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
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
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Reference designs

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 (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP21055 — 0.8V-4.2Vin to 3.3V@100mA Boost+Buck Reference Design

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. 
Test report: PDF
Schematic: PDF
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DSBGA (YFP) 8 View options
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