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TPS627451

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Convertidor reductor con entrada de 10 V e IQ ultrabajo

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TPS627451

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Detalles del producto

Rating Catalog Topology Buck Iout (max) (A) 0.3 Vin (max) (V) 10 Vin (min) (V) 3.3 Vout (max) (V) 2.8 Vout (min) (V) 1.3 Features Adaptive/Dynamic Voltage Scaling, Enable, Light-load efficiency, Output discharge, Power good Control mode Constant on-time (COT), DCS-Control Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0000004 Duty cycle (max) (%) 100
Rating Catalog Topology Buck Iout (max) (A) 0.3 Vin (max) (V) 10 Vin (min) (V) 3.3 Vout (max) (V) 2.8 Vout (min) (V) 1.3 Features Adaptive/Dynamic Voltage Scaling, Enable, Light-load efficiency, Output discharge, Power good Control mode Constant on-time (COT), DCS-Control Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0000004 Duty cycle (max) (%) 100
WSON (DSS) 12 6 mm² (3 mm × 2 mm)
  • Input Voltage Range VIN from 3.3 V to 10 V
  • Typical 400 nA Quiescent Current
  • Up to 90% efficiency with load currents >15 µA
  • Up to 300 mA Output Current
  • RF Friendly DCS-Control™
  • Low Output Ripple Voltage
  • 16 Selectable Output Voltages from
    • 1.8 V to 3.3 V (TPS62745)
    • 1.3 V to 2.8 V (TPS627451)
  • Integrated input voltage switch
  • Integrated Discharge Function at VOUT
  • Open Drain Power Good Output
  • Operates with a Tiny 3.3 µH or 4.7 µH Inductor
  • Small 3 mm × 2 mm WSON Package
  • Input Voltage Range VIN from 3.3 V to 10 V
  • Typical 400 nA Quiescent Current
  • Up to 90% efficiency with load currents >15 µA
  • Up to 300 mA Output Current
  • RF Friendly DCS-Control™
  • Low Output Ripple Voltage
  • 16 Selectable Output Voltages from
    • 1.8 V to 3.3 V (TPS62745)
    • 1.3 V to 2.8 V (TPS627451)
  • Integrated input voltage switch
  • Integrated Discharge Function at VOUT
  • Open Drain Power Good Output
  • Operates with a Tiny 3.3 µH or 4.7 µH Inductor
  • Small 3 mm × 2 mm WSON Package

The TPS62745 is a high efficiency ultra low power synchronous step down converter optimized for low power wireless applications. It provides a regulated output voltage consuming only 400-nA quiescent current. The device operates from two rechargeable Li-Ion batteries, Li-primary battery chemistries such as Li-SOCl2, Li-SO2, Li-MnO2 or four to six cell alkaline batteries. The input voltage range up to 10 V allows also operation from a USB port and thin-film solar modules. The output voltage is set with four VSEL pins between 1.8 V and 3.3 V for TPS62745 or 1.3 V and 2.8 V for TPS627451. TPS62745 features low output ripple voltage and low noise with a small output capacitor. An internal input voltage switch controlled by pin EN_VIN_SW connects the supply voltage to pin VIN_SW. The switch is intended to be used for an external voltage divider, scaling down the input voltage for an external ADC. The switch is automatically opened when the supply voltage is below the undervoltage lockout threshold. The TPS62745 is available in a small 12 pin 3 mm × 2 mm WSON package.

The TPS62745 is a high efficiency ultra low power synchronous step down converter optimized for low power wireless applications. It provides a regulated output voltage consuming only 400-nA quiescent current. The device operates from two rechargeable Li-Ion batteries, Li-primary battery chemistries such as Li-SOCl2, Li-SO2, Li-MnO2 or four to six cell alkaline batteries. The input voltage range up to 10 V allows also operation from a USB port and thin-film solar modules. The output voltage is set with four VSEL pins between 1.8 V and 3.3 V for TPS62745 or 1.3 V and 2.8 V for TPS627451. TPS62745 features low output ripple voltage and low noise with a small output capacitor. An internal input voltage switch controlled by pin EN_VIN_SW connects the supply voltage to pin VIN_SW. The switch is intended to be used for an external voltage divider, scaling down the input voltage for an external ADC. The switch is automatically opened when the supply voltage is below the undervoltage lockout threshold. The TPS62745 is available in a small 12 pin 3 mm × 2 mm WSON package.
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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos TPS62745 Dual-cell Ultra Low IQ Step Down Converter for Low Power Wireless Applications datasheet (Rev. A) PDF | HTML 10/06/2015
Informe Extending Battery Life in Smart E-Locks (Rev. A) 4/06/2020
Informe Benefits of a Resistor-to-Digital Converter in Ultra-Low Power Supplies 14/10/2019
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
Analog Design Journal Testing tips for applying external power to supply outputs without an input voltage 24/10/2016
Analog Design Journal Understanding frequency variation in the DCS-Control(TM) topology 30/10/2015

Diseño y desarrollo

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Placa de evaluación

TPS62745EVM-622 — Módulo de evaluación de convertidor reductor VIN amplio con IQ ultrabajo

The TPS62745EVM-622 is designed to help the user easily evaluate and test the operation and functionality of the TPS62745. The EVM converts a 3.3-V to 10-V input voltage to a regulated output voltage that is set between 1.8 V and 3.3 V at up to 300 mA. The TPS62745 also includes an integrated input (...)

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