The ADP5303 is high efficiency, ultralow quiescent current step-down regulator that draws only 240 nA quiescent current to regulate the output at no load.
The ADP5303 runs from an input voltage of 2.15 V to 6.50 V, allowing the use of multiple alkaline or NiMH cells, Li-Ion cells, or other power sources. The output voltage is selectable from 0.8 V to 5.0 V by an external VID resistor and a factory fuse. The total solution requires only four tiny external components.
The ADP5303 can operate between hysteresis mode and PWM mode via the SYNC/MODE pin. In hysteresis mode, the regulator achieves excellent efficiency at less than 1 mW and provides up to 50 mA of output current. In PWM mode, the regulator produces a lower output ripple and supplies up to 500 mA of output current. The flexible configuration capability during operation of the device enables very efficient power management to meet both long battery life and low system noise requirements.
- Input supply voltage range: 2.15 V to 6.50 V
- Operates down to 2.00 V
- Ultralow 240 nA quiescent current with no load
- Selectable output voltages of 1.2 V to 3.6 V, or 0.8 V to 5.0 V
- ±1.5% output accuracy over the full temperature range in pulse-width modulation (PWM) mode
- Selectable hysteresis mode or PWM operation mode
- VINOK flag to monitor input battery voltage
- 100% duty cycle operation mode
- 2 MHz switching frequency with optional synchronization input from 1.2 MHz to 2.5 MHz
