ADP5300

Data Sheet 50 mA/500 mA, High Efficiency, Ultralow Power Step-Down Regulator ADP5300 FEATURES Input supply voltage range: 2.15 V to 6.50 V Operates down to 2.00 V voltage Ultralow 180 nA quiescent current Selectable output voltage of 0.8 V to 5.0 V ±1.5% output accuracy over full temperature range in PWM mode Selectable hysteresis mode or PWM operation mode Output current Up to 50 mA in hysteresis mode Up to 500 mA in PWM mode VOUTOK flag monitors the output voltage Ultrafast stop switching control 100% duty cycle operation mode 2.0 MHz typical switching frequency in PWM mode with optional SYNC clock range from 1.5 MHz to 2.5 MHz Quick output discharge (QOD) option UVLO, OCP, and TSD protection 10-lead, 3 mm × 3 mm LFCSP −40°C to +125°C operating temperature range APPLICATIONS Energy (gas and water) metering Portable and battery-powered equipment Medical applications Keep-alive power supplies GENERAL DESCRIPTION The ADP5300 is a high efficiency, ultralow quiescent current step-down regulator that draws only 180 nA quiescent current to regulate the output. The ADP5300 runs from an input supply voltage range of 2.15 V to 6.50 V, allowing the use of multiple alkaline or NiMH, 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 factory fuse. The total solution requires only four tiny external components. The ADP5300 can operate between hysteresis mode and pulsewidth modulation (PWM) mode via the SYNC/MODE pi...