ST1PS02D1QTR

ST1PS02D1QTR is a nano-quiescent miniaturized synchronous step-down converter specifically designed for applications where high efficiency, PCB size and thickness are the key factors. The ST1PS02 is a new generation buck converter targets a very small quiescent current consumption and it guarantees high-efficiency operation even down to few microampere loads. It is based on a hysteretic comparator that senses the coil ripple current that is held constant in all operation modes. The device has seamless transition between PFM (pulse frequency modulation) and PWM (pulse width modulation) mode with low ripple and good load transient response. In order to maintain constant ripple current on the selected coil, the device changes switching frequency, which also depends on input supply voltage. Suitable for personal tracking monitors, smart watches, sport bands, energy harvesting, wireless sensors, industrial sensors, portable low power devices, Bluetooth® low energy and Zigbee applications.

• Operating input voltage range from 1.8V to 5.5V
• 1V to 1.35V, 50mV steps output voltage, NO output discharge
• Low power control operation for the best efficiency
• Embedded soft-start circuit
• Settable inductor current limitation
• Undervoltage lockout is 1.57V (VIN falling, typ)
• Up to 400mA output current capability, ±1.5% output voltage accuracy (VOUT, TA = 25°C)
• Output voltage power good
• 400µm pitch, 12 pin TQFN package (400µm pitch)
• Operating ambient temperature range from -40 to 85°C