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TPS62743

AKTIV

Abwärtswandler (Buck-DC/DC-Wandler), 2-5,5 V Eingangsspannung, extrem niedriger Stromverbrauch von 3

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Selbe Funktionalität wie der verglichene Baustein bei abweichender Anschlussbelegung.
TPS62843 AKTIV 600 mA-Abwärtswandler mit extrem niedrigem IQ und 1,8 bis 5,5 V Eingang Lower quiescent current alternative with more output voltage options
TPS62840 AKTIV Hocheffizienter Abwärtswandler, 60 nA Ruhestrom (IQ), 1,8 bis 6,5 VIN, 750 mA Lower Iq of 60 nA and more output voltage options

Produktdetails

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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Technische Dokumentation

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* Datenblatt TPS62743TPS627431300/400 mA High Efficiency Buck Converter with Ultra-low Quiescent Current datasheet (Rev. B) PDF | HTML 19.03.2021
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Analog Design Journal Methods of output-voltage adjustment for DC/DC converters 14.06.2019
Analog Design Journal Understanding 100% mode in low-power DC/DC converters 22.06.2018
Analog Design Journal Achieving a clean startup by using a DC/DC converter with a precise enable-pin threshold 24.10.2017
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Analog Design Journal Testing tips for applying external power to supply outputs without an input voltage 24.10.2016
Prüfbericht Power Management Reference Design for a Wearable Device with Wireless Charging (Rev. A) PDF | HTML 14.04.2016
Analog Design Journal Understanding frequency variation in the DCS-Control(TM) topology 30.10.2015

Design und Entwicklung

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Evaluierungsplatine

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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 (...)

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Simulationsmodell

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