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Ultra-low-power 300mA to 400mA Step-Down Buck DCDC Converter with 360nA Iq in WCSP package


Package | PIN: YFP | 8
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $1.63
10-24 $1.46
25-99 $1.36
100-249 $1.18
250-499 $1.09
500-749 $0.92
750-999 $0.75
1000+ $0.69


  • 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 400mA
  • 360 nA Operational Quiescent Current
  • Up to 90% Efficiency at 10-µA Output Current
  • Power Save Mode Operation
  • Selectable Output Voltages
    • 8 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 <10mm2
  • Small 1.6 mm × 0.9 mm, 8 Ball WCSP Package

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Texas Instruments  TPS627431YFPR

The TPS62743 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. TPS62743 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 TPS62743 provides 8 programmable output voltages between 1.2Vand 3.3V selectable by three selection pins. TheTPS62743 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.