STMicroelectronics ST1PS01, ST1PS02 and ST1PS03 converters

ST offers a wide portfolio of monolithic DC-DC switching converters (i.e. controller and MOSFET in the same package). This broad portfolio of ICs is composed of highly-specialized products to meet every market requirement. High reliability and robustness for industrial (factory automation, UPS, solar, home appliances, lighting, etc.) and other high-voltage applications. High efficiency at any load and a high level of performance for consumer (smartphones, digital cameras, portable fitness devices, LED TVs, set top boxes, Blue-ray players, computer & storage, etc) and server/telecom applications.

ST1PS01/02/03 are nano-quiescent miniaturized synchronous step-down converters, which are able to provide up to 400 mA output current with an input voltage ranging from 1.8 V to 5.5 V.
These converters are 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 for the ST1PS01, and three digital control inputs for the ST1PS02 and ST1PS03 as follows:

• ST1PS01, V_OUT from 0.625 V to 3.3 V.
• ST1PS02, V_OUT from 1.0 V to 3.3 V.
• ST1PS03, V_OUT from 1.6 V to 3.3 V.

Thanks to the enhanced PCC (peak current control) ST1PS01/02/03 reach 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 for ST1PS01, and thin plastic package for ST1PS02 and ST1PS03.

Key features

• 500 nA input quiescent current at V_IN = 3.6 V (not switching)
• ST1PS01: 94% typical efficiency at 1 mA load (V_IN = 3.6 V, V_OUT = 3.3 V)
• ST1PS02 and ST1PS02: 92% typical efficiency at 10 mA load (V_IN = 3.6 V, V_OUT = 2.5 V)
• 100% duty cycle

Additional features

• 500 nA input quiescent current at V_IN=3.6 V (not switching)
• 94% typical efficiency at 1 mA load (V_IN=3.6 V, V_OUT=3.3 V) for ST1PS01, and 92% typical efficiency at 10 mA load (V_IN = 3.6 V, V_OUT = 2.5 V) for ST1PS02 and ST1PS03.
• 100% duty cycle
• 1.8 V to 5.5 V input operating range
• Undervoltage lockout: 1.57 V (V_IN 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: 0.625 V to 3.3 V for ST1PS01, 1.0 V to 3.3 V for ST1PS02 and 1.6 V to 3.3 V for ST1PS03.
• Output voltage Power Good
• ±1.5% output voltage accuracy (V_OUT, TA = 25 °C)
• Dynamic output voltage selection (D0, D1) for ST1PS01, and Dynamic output voltage selection (D0, D1 and D2) for ST1PS02 and ST1PS03.
• Available in Flip-Chip package for ST1PS01, and TQFN12 package ST1PS02 and ST1PS03.

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

Available tools

• STEVAL-1PS01AJR: Evaluation board based on ST1PS01AJR 400 mA nano-quiescent synchronous step-down converter
• STEVAL-1PS01DJR: Evaluation board based on ST1PS01DJR 400 mA nano-quiescent synchronous step-down converter
• STEVAL-1PS01EJR: Evaluation board based on the ST1PS01EJR 400 mA nano-quiescent synchronous step-down converter
• STEVAL-1PS02B: Evaluation board based on ST1PS02BQTR 400 mA nano-quiescent synchronous step-down converter with AUX switch
• STEVAL-1PS02A: Evaluation board based on ST1PS02AQTR 400 mA nano-quiescent synchronous step-down converter with AUX switch
• STEVAL-1PS02C: Evaluation board based on ST1PS02CQTR 400 mA nano-quiescent synchronous step-down converter with AUX switch
• STEVAL-1PS02D: Evaluation board based on ST1PS02DQTR 400 mA nano-quiescent synchronous step-down converter with AUX switch
• STEVAL-1PS03A: Evaluation board based on ST1PS03AQTR 400 mA nano-quiescent synchronous step-down converter with load switch

ST1PS01-2-3-DCDC-converters