STEVAL-1PS02A: 1.8V @ 400mA, 1.8 ~ 5.5V in

The STEVAL-1PS02A evaluation board allows evaluation of a smart converter designable to deliver up to 400 mA output current from a 1.8 V to 5.5 V input, with adynamically adjustable 1.4 V to 1.75 V output voltage.

The board embeds the ST1PS02AQTR nano-quiescent miniaturized synchronous step-down converter which implements enhanced peak current control (PCC) and advanced design circuitry to minimize quiescent current. It features a controlled load switch to supply a subsystem with the same voltage rail. The device is supplied in TQFN12 (2.0x1.7 mm) thin package, but other packages are also available.

The board demonstrates how highly efficient conversion can be achieved using just the ST1PS02AQTR, a 2.2 µH inductor and two small capacitors.

The board highlights ST1PS02AQTR key application benefits, including high efficiency and small PCB size and thickness, and is ideal for power conversion solutions in wearable applications, fitness accessories, personal tracking monitors, smart watches, sports bands, energy harvesting, wireless sensors, industrial sensors, portable low power devices, single cell Li-Ion battery applications as well asBluetooth® low energy and Zigbee applications.

Features:

• 500 nA input quiescent current at VIN = 3.6 V (not switching)

• 92% typical efficiency at 10 mA load (VIN = 3.6 V, VOUT = 2.5 V)

• 100% duty cycle

• 1.8 to 5.5 V input operating range

• Undervoltage lockout: 1.57 V (VIN falling, typ.)

• Up to 400 mA output current capability

• Embedded soft-start circuit

• Tiny external components: L = 2.2 µH typ.

• Settable inductor current limitation

• Dynamically selectable output voltages from 1.4 to 1.75 V

• Output voltage power good

• ±1.5% output voltage accuracy (VOUT, TA = 25 °C)

• Auxiliary load switch Vout2 (AUX control input)

• WEEE and RoHS compliant (hardware only)