STEVAL-1PS01EJR STMicroelectronics

STEVAL-1PS01EJR Data brief Evaluation board based on the ST1PS01EJR 400 mA nano-quiescent synchronous step-down converter Features 94% typical efficiency at 1 mA load (V =3.6 V, V =3.3 V) IN OUT 1.8 V to 5.5 V input operating range Up to 400 mA output current capability Tiny external components: L=2.2 H typ. Selectable output voltages: 1.8 V to 3.3 V Output voltage Power Good Dynamic output voltage selection (D0, D1) Suitable for the following 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 Hardware is WEEE and RoHS compliant Description Product summary The STEVAL-1PS01EJR evaluation board features the ST1PS01 nano-quiescent Evaluation board miniaturized synchronous step-down converter that is designed for applications for ST1PS01 step- STEVAL-1PS01EJR down converter where high efficiency, PCB size and thickness are key factors. 400 mA nano- The converter can provide up to 400 mA output current with an input voltage ranging quiescent from 1.8 V to 5.5 V. The output voltage can be dynamically adjusted from 1.8 V to 3.3 synchronous step- V using two digital control inputs. down converter with ST1PS01 Thanks to the enhanced peak current control (PCC), the ST1PS01 can achieve very digital voltage selection and power high conversion efficiency using only a 2.2 H inductor and two small capacitors. good The advanced design circuitry minimizes quiescent current. DB3814 - Rev 2 - June 2019 www.st.com For further information contact your local STMicroelectronics sales office.STEVAL-1PS01EJR Block diagram 1 Block diagram Figure 1. STEVAL-1PS01EJR block diagram PGOOD VFB - + Vref VIN UVLO Comp. VIN Vref - VIN Bandgap/Bias Vuvlo + VOUT EN Output Discharge VIN Peak and Valley VSW CURRENT LIMIT VOUT Driver/ Min. ON Time PWM CTRL Anti-cross SW D1 Vout Logic conduction Min. OFF Time Selection circuitry Logic D0 Pulse Freq. Detection High Current Zero 100% VFB Mode Crossing Mode + VSW Comp. Comp. TON - VOUT Compensation - + VSW VIN - Vref + + GND Vth100% Soft Start + Ramp DB3814 - Rev 2 page 2/5