The ADP5304 is a high efficient, ultralow quiescent current step-down regulator that draws only 260 nA of quiescent current to regulate the output at no load.
The ADP5304 runs from an input voltage range of 2.15 V to 6.50 V, allowing the use of the multiple alkaline, NiMH, and Lithium cells, or the use of a high impedance power source. The output voltage is selectable from 0.8 V to 5.0 V by an external VID resistor to ground. The total solution requires only four tiny external components.
The ADP5304 operates in hysteresis mode via connecting the MODE pin to ground. In hysteresis mode, the regulator achieves excellent efficiency at a power of less than 1 mW and provides up to 50 mA of output load. The device enables very efficient power management to achieve the collection of small amounts of energy from the high impedance battery or the energy harvester to charge up the conventional capacitor or super capacitor.
- Input start-up voltage range: 2.15 V to 6.50 V
- Operation down to 2.00 V
- Ultralow, 260 nA quiescent current with no load
- Selective output voltage from 1.2 V to 3.6 V (or 0.8 V to 5.0 V)
- ±2.5% output accuracy over the full temperature range
- Selectable hysteresis or pulse-width modulation (PWM) operation mode
- Output current up to 50 mA in hysteresis mode
- VINOK flag to monitor the input voltage
- Ultrafast stop switching control
- 100% duty cycle operation mode
- Quick output discharge (QOD) option
- Undervoltage lockout (UVLO), OCP, and thermal shutdown (TSD) protection
- 10-lead, 3 mm × 3 mm LFCSP package
- -40°C to +125°C operating junction temperature range
