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


Package | PIN: YFP | 8
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $1.54
10-24 $1.38
25-99 $1.28
100-249 $1.12
250-499 $1.03
500-749 $0.86
750-999 $0.71
1000+ $0.65


  • 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 <10mm2
  • Small 1.6 mm × 0.9 mm, 8 Ball WCSP Package

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Texas Instruments  TPS62748YFPR

The TPS62748 is a high efficiency stepdown converter with ultra low quiescent current of typical 360 nA. The device is optimized tooperate with a 2.2-µH inductor and 10µF output capacitor. The device uses DCS-Control™ and operateswith a typical switching frequency of 1.2 MHz. In Power Save Mode the device extends the light loadefficiency down to a load current range of 10-µA and below. TPS62748 provides an output currentof 300 mA. Oncestarted the device operates down to an input voltage range of 2.0 V. This allows to operate thedevice directly from a single Li-MnO2 coin cell.

The TPS62748 provides two programmableoutput voltages of 1.2V and 1.8V selectable by one voltage select pin. The TPS62748 is optimized to provide alow output voltage ripple and low noise using a small output capacitor. Once the input voltagecomes close to the output voltage the device enters the No Ripple 100% mode to prevent an increaseof output ripple voltage. In this operation mode the device stops switching and turns the high sideMOSFET switch on.

The TPS62748 has a 100 mA load switch between pins VOS and LOAD with atypical ON-resistance of 0.6 Ohm. The load switch is typically used to distribute the buckconverter output voltage to the sub-system.