ADP5304

Data Sheet Ultralow Power Step-Down Regulator for Energy Harvesting ADP5304 FEATURES Input supply voltage range: 2.15 V to 6.50 V Operation down to 2.00 V typical Ultralow, 260 nA typical 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 Output current up to 50 mA in hysteresis mode VINOK flag to monitor the input voltage 100% duty cycle operation mode Quick output discharge (QOD) option Undervoltage lockout (UVLO), overcurrent protection (OCP), and thermal shutdown (TSD) protection 10-lead, 3 mm × 3 mm LFCSP package −40°C to +125°C operating junction temperature range APPLICATIONS Energy (gas, water) metering Energy harvesting applications Portable and battery-powered equipment Medical applications Keep-alive power supply TYPICAL APPLICATION CIRCUIT VIN = 2.15V TO 6.5V 10µF PVIN SW ADP5304 ON OFF EN PGND 2.2µH 10µF VOUT MODE NC AGND FB VINOK VID EPAD VID0: 1.2V VID8: 2.5V VID1: 1.5V VID9: 2.6V R0 VID2: 1.8V VID3: 2.0V VID10: 2.7V VID11: 2.8V VID4: 2.1V VID12: 2.9V VID5: 2.2V VID13: 3.0V VID6: 2.3V VID14: 3.3V VID7: 2.4V VID15: 3.6V Figure 1. 13493-001 GENERAL DESCRIPTION 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...