ST1PS01AJR STMicroelectronics

ST1PS01 Datasheet 400 mA nano-quiescent synchronous step-down converter with digital voltage selection and Power Good Features 500 nA input quiescent current at V =3.6 V (not switching) IN 94% typical efficiency at 1 mA load (V =3.6 V, V =3.3 V) IN OUT 100% duty cycle 1.8 V to 5.5 V input operating range Undervoltage lockout: 1.57 V (V falling, typ.) IN 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 H typ. Selectable output voltages: 0.625 V to 3.3 V Output voltage Power Good 1.5% output voltage accuracy (V , T = 25 C) OUT A Dynamic output voltage selection (D0, D1) Available in Flip-Chip package Applications Wearable applications Personal tracking monitors Smart watches, sport bands Product status link Energy harvesting, wireless sensors Wearable and fitness accessories ST1PS01 Industrial sensors, portable low power devices Single cell Li-Ion battery applications Bluetooth low energy Zigbee Description 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 V from 0.625 V to 3.3 V can be dynamically selected. Thanks to OUT the enhanced PCC (peak current control) the ST1PS01 reaches very high efficiency conversion using just a 2.2 H inductor and two small capacitors. Advanced design circuitry is implemented to minimize the quiescent current. The device is available in Flip-Chip package. DS12799 - Rev 6 - June 2021 www.st.com For further information contact your local STMicroelectronics sales office.ST1PS01 Application schematic 1 Application schematic Figure 1. ST1PS01 application schematic Table 1. Typical external components Component Description Value Size - imperial (metric) C Ceramic capacitor with low ESR values 10 F 0603 (1608) IN C Ceramic capacitor with low ESR values 10 F 0603 (1608) OUT L Inductor 2.2 H 0806 (2016) R Pull-up resistor 1 M 0402 (1005) PU DS12799 - Rev 6 page 2/20