ADP5302 Datasheet | Analog Devices

Data Sheet 50 mA/500 mA, Ultralow Power Step-Down Regulator with Battery Voltage Monitor Features 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 Output current Up to 50 mA in hysteresis mode Up to 500 mA in PWM mode VINOK flag to monitor input battery voltage Ultrafast stop switching control 100% duty cycle operation mode 2 MHz switching frequency with optional synchronization input 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 package Junction temperature: - 40°C to +125°C APPLICATIONS Energy (gas, water) metering Portable and battery-powered equipment Medical applications Keep-alive power supplies GENERAL DESCRIPTION The ADP5302 is a high efficiency, ultralow quiescent current step-down regulator that draws only 240 nA quiescent current to regulate the output at no load. The ADP5302 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, dynamic voltage identification (VID) resistor and a factory fuse. The total solution requires only four tiny external ponents. The ADP5302 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...