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TPS62746

AKTIV

Ultra-Low-Power-DC/DC-Wandler mit VIN-Schalter im WCSP-Gehäuse

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TPS62840 AKTIV Hocheffizienter Abwärtswandler, 60 nA Ruhestrom (IQ), 1,8 bis 6,5 VIN, 750 mA Ultra-low IQ of 60 nA and higher output current up to 750 mA available
TPS62843 AKTIV 600 mA-Abwärtswandler mit extrem niedrigem IQ und 1,8 bis 5,5 V Eingang Smaller solution size for 275-nA IQ and 0.4-V to 3.6-V VOUT

TPS62746

AKTIV
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Produktdetails

Rating Catalog Topology Buck Iout (max) (A) 0.3 Vin (max) (V) 5.5 Vin (min) (V) 2 Vout (max) (V) 1.8, 3.3 Vout (min) (V) 1.2 Features Adaptive/Dynamic Voltage Scaling, Enable, 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) 1.8, 3.3 Vout (min) (V) 1.2 Features Adaptive/Dynamic Voltage Scaling, Enable, 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 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
  • 300-mA output current
  • 360-nA operational quiescent current
  • Up to 90% efficiency at 10-µA output current
  • Power save mode operation
  • Selectable output voltages
    • 1.2 V and 1.8 V
  • Output voltage discharge
  • 1-mA /150-Ω integrated input voltage switch
  • 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
  • 300-mA output current
  • 360-nA operational quiescent current
  • Up to 90% efficiency at 10-µA output current
  • Power save mode operation
  • Selectable output voltages
    • 1.2 V and 1.8 V
  • Output voltage discharge
  • 1-mA /150-Ω integrated input voltage switch
  • 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 TPS62746 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. TPS62746 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 TPS62746 provides two programmable output voltages of 1.2V and 1.8V selectable by one voltage select pin. The TPS62746 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 TPS62746 has an integrated 1-mA switch that connects the supply voltage at pin VIN to the output VINSW. This low current switch can be used to disconnect a resistor divider from the input supply typically being used to measure the input voltage with an ADC.

The TPS62746 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. TPS62746 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 TPS62746 provides two programmable output voltages of 1.2V and 1.8V selectable by one voltage select pin. The TPS62746 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 TPS62746 has an integrated 1-mA switch that connects the supply voltage at pin VIN to the output VINSW. This low current switch can be used to disconnect a resistor divider from the input supply typically being used to measure the input voltage with an ADC.
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Technische Dokumentation

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Top-Dokumentation Typ Titel Format-Optionen Datum
* Data sheet TPS62746300/400 mA High Efficiency Buck Converter with Ultra-low Quiescent Current and VIN Switch datasheet (Rev. B) PDF | HTML 19 Mär 2021
Application note Quick Reference Guide To TI Buck Switching DC/DC Application Notes (Rev. B) PDF | HTML 23 Mai 2022
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 Okt 2019
Analog Design Journal Methods of output-voltage adjustment for DC/DC converters 14 Jun 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 threshold 24 Okt 2017
Analog Design Journal Testing tips for applying external power to supply outputs without an input voltage 24 Okt 2016
Analog Design Journal Understanding frequency variation in the DCS-Control(TM) topology 30 Okt 2015

Design und Entwicklung

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Evaluierungsplatine

TPS62746EVM-706 — TPS6274x Ultra-Niedrig-Iq-Abwärtswandler – Evaluierungsmodul

The TPS62746EVM-706 is designed to help the user easily evaluate and test the operation and functionality of the TPS62746. The EVM converts a 2.0-V to 5.5-V input voltage to a regulated output that is set to either 1.2 V or 1.8 V at up to 300 mA. The TPS62746 has an integrated VIN switch and comes (...)

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Simulationsmodell

TPS62746 PSpice Unencrypted Transient Model (Rev. A)

SLVMBG7A.ZIP (91 KB) - PSpice Model
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