ST1PS03A1QTR

ST1PS03A1QTR is a nano-quiescent miniaturized synchronous step-down converter, which is able to provide upto 400mA output current with an input voltage ranging from 1.8V to 5.5V. 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 three digital control inputs, a VOUT from 1.6V to 3.3V can be dynamically selected. Thanks to the enhanced PCC (peak current control) this device reaches very high-efficiency conversion using just a 2.2µH inductor and two small capacitors. An advanced design circuitry is developed to minimize the quiescent current. It is used in applications such as wearable applications, personal tracking monitors, smart watches, sports 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.

• Quiescent current is 500nA typ at (EN = VIN, AUX = GND, TA = 25°C)
• 100% duty cycle, input operating range from 1.8V to 5.5V
• Undervoltage lockout threshold is 1.57V typ at (VIN falling, VOUT = 1.8V, TA = 25°C)
• Upto 400mA output current capability, low power control operation for the best efficiency
• Embedded soft-start circuit, output voltage power good
• Output voltage accuracy is 1.5% max at (VIN = 3.6V, whole VOUT range, IOUT = 100mA)
• Dynamic output voltage selection (D0, D1 and D2), load switch controlled by AUX input
• Output voltage range from 1.60V to 3.3V
• Junction temperature range from -40°C to 125°C
• TQFN12 package