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TPS62748

ACTIVE

High-efficiency Buck Converter with Ultra-low Quiescent Current and Load Switch

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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 Ultra-low IQ of 60 nA and higher output current up to 750 mA available
TPS62843 ACTIVE 1.8V to 5.5V input, 600mA ultra-low IQ step-down converter Smaller solution size for 275-nA IQ and 0.4-V to 3.6-V VOUT

Product details

Rating Catalog Topology Buck Iout (max) (A) 0.3 Vin (max) (V) 5.5 Vin (min) (V) 2.15 Vout (max) (V) 1.8 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 125 Iq (typ) (A) 0.00000036 Duty cycle (max) (%) 100
Rating Catalog Topology Buck Iout (max) (A) 0.3 Vin (max) (V) 5.5 Vin (min) (V) 2.15 Vout (max) (V) 1.8 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 125 Iq (typ) (A) 0.00000036 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
  • 100-mA/2.2-Ω integrated load 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
  • 100-mA/2.2-Ω integrated load 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 TPS62748 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. TPS62748 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 TPS62748 provides two programmable output voltages of 1.2V and 1.8V selectable by one voltage select pin. The TPS62748 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 TPS62748 has a 100 mA load switch between pins VOS and LOAD with a typical ON-resistance of 0.6 Ohm. The load switch is typically used to distribute the buck converter output voltage to the sub-system.

The TPS62748 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. TPS62748 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 TPS62748 provides two programmable output voltages of 1.2V and 1.8V selectable by one voltage select pin. The TPS62748 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 TPS62748 has a 100 mA load switch between pins VOS and LOAD with a typical ON-resistance of 0.6 Ohm. The load switch is typically used to distribute the buck converter output voltage to the sub-system.
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Technical documentation

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* Data sheet TPS62748300/400 mA High Efficiency Buck Converter with Ultra-low Quiescent Current and Load Switch 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
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
Technical article Do all rails need low Iq? PDF | HTML 15 Jul 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 Oct 2017
Analog Design Journal Testing tips for applying external power to supply outputs without an input voltage 24 Oct 2016
Analog Design Journal Understanding frequency variation in the DCS-Control(TM) topology 30 Oct 2015

Design & development

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Evaluation board

TPS62748EVM-706 — TPS62748 Ultra Low Iq Step-Down Converter Evaluation Module with Load Switch

The TPS62748EVM-706 is designed to help the user easily evaluate and test the operation and functionality of the TPS62748. The EVM converts a 2.0-V to 5.5-V input voltage to a regulated output voltage that is set to either 1.2 V or 1.8 V at up to 300 mA. The TPS62748 has an integrated VOUT switch (...)

User guide: PDF
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Simulation model

TPS62748 PSpice Unencrypted Transient Model (Rev. B)

SLVMBA6B.ZIP (88 KB) - PSpice Model
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DSBGA (YFP) 8 Ultra Librarian

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