STMicroelectronics ST1PS03 Synchronous Step-Down Converters

STMicroelectronics ST1PS03 Synchronous Step-Down Converters are nano-quiescent miniaturized synchronous step-down converters. The converters provide up to a 400mA output current with an input voltage ranging from 1.8V to 5.5V. The devices are 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 1.6V to 3.3V can be dynamically selected.

Features

  • 500nA input quiescent current at VIN = 3.6V (not switching)
  • 92% typical efficiency at 10 mA load (VIN = 3.6V, VOUT = 2.5V)
  • 100% duty cycle
  • 1.8V to 5.5V input operating range
  • Undervoltage lockout: 1.57V (VIN falling, typ.)
  • Up to 400mA output current capability
  • Low power control operation for the best efficiency
  • Embedded soft-start circuit
  • Tiny external components: L = 2.2µH typ.
  • Selectable output voltages: 1.6V to 3.3V
  • Output voltage Power Good
  • ±1.5% output voltage accuracy (VOUT, TA = 25°C)
  • Dynamic output voltage selection (D0, D1, and D2)
  • Load switch controlled by AUX input
  • Available in TQFN12 package

Applications

  • Wearable applications
  • Personal tracking monitors
  • Smart watches, sport bands
  • Energy harvesting, wireless sensors
  • Wearable and fitness accessories
  • Industrial sensors, portable low power devices
  • Single-cell Li-Ion battery applications
  • Bluetooth® Low Energy
  • Zigbee

Videos

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Application schematic

STMicroelectronics ST1PS03 Synchronous Step-Down Converters
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