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400 mA nano-quiescent synchronous step-down converter with digital voltage selection, Power Good and AUX switch

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10 - 24$1.9310%
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In stock
Parameter NameParameter Value
Input Voltage Min Volt1.8
Input Voltage Max Volt5.5
Packing TypeTape And Reel
RoHs compliantEcopack2
Package NameMLPQ/QFN 1.7x2.0x0.55 12L P0.4

The ST1PS02 is a nano-quiescent miniaturized synchronous step-down converter, which is able to provide up to 400 mA output current with an input voltage ranging from 1.8 V to 5.5 V. This converter is specifically designed for applications where high efficiency, PCB size and thickness are the key factors. The output voltage can be set using three digital control inputs, a VOUT from 1.0 V to 3.3 V can be dynamically selected. Thanks to the enhanced PCC (peak current control) the ST1PS02 reaches very high efficiency conversion using just a 2.2 µH inductor and two small capacitors. The device embeds a controlled load switch to supply a subsystem with same voltage rail. Advanced design circuitry is implemented to minimize the quiescent current. The device is available in thin plastic package.

Key features
  • 500 nA input quiescent current at VIN = 3.6 V (not switching)
  • 92% typical efficiency at 10 mA load (VIN = 3.6 V, VOUT = 2.5 V)
  • 100% duty cycle
  • 1.8 V to 5.5 V input operating range
  • Undervoltage lockout: 1.57 V (VIN falling, typ.)
  • Up to 400 mA output current capability
  • Low power control operation for the best efficiency
  • Embedded soft-start circuit
  • Tiny external components: L = 2.2 µH typ.
  • Settable inductor current limitation
  • Selectable output voltages: 1.0 V to 3.3 V
  • Output voltage Power Good
  • ±1.5% output voltage accuracy (VOUT, TA = 25 °C)
  • Dynamic output voltage selection (D0, D1 and D2)
  • Auxiliary load switch Vout2 (AUX control input)
  • Available in TQFN12 package