ST – ST1PS01 – 400mA Nano-Quiescent Synchronous step-down converter with digital voltage selection and power good
The ST1PS01 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 two digital control inputs, a VOUT from 1.8 V to 3.3 V can be dynamically selected. Thanks to the enhanced PCC (peak current control) the ST1PS01 reaches very high efficiency conversion using just a 2.2 μH inductor and two small capacitors. Advanced design circuitry is implemented to minimize the quiescent current. The device is available in Flip-Chip package.
Features
- 500 nA input quiescent current at VIN=3.6 V (not switching)
- 94% typical efficiency at 1 mA load (VIN=3.6 V, VOUT=3.3 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.
- Selectable output voltages: 1.8 V to 3.3 V
- Output voltage Power Good
- ±1.5% output voltage accuracy (VOUT, TA=25 °C)
- Dynamic output voltage selection (D0, D1)
- Available in Flip-Chip 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
Intern: ICPWM
