ADP2371

Data Sheet High Voltage, 1.2 MHz/600 kHz, 800 mA, Low Quiescent Current Buck Regulator ADP2370/ADP2371 09531-001 FEATURES Input voltage range: 3.2 V to 15 V, output current: 800 mA Quiescent current < 14 µA in power saving mode (PSM) >90% efficiency Force PWM pin (SYNC), 600 kHz/1.2 MHz frequency pin (FSEL) Fixed outputs: 0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.0 V, 3.3 V, 5 V, and adjustable option 100% duty cycle capability Initial accuracy: ±1% Low shutdown current: <1.2 µA Quick output discharge (QOD) option Synchronizable to an external clock 8-lead, 0.75 mm × 3 mm × 3 mm LFCSP (QFN) package Supported by ADIsimPower design tool APPLICATIONS Portable and battery-powered equipment Automatic meter readers (WSN) Point of sales and transaction processing instruments Medical instruments Medium format display tablets and pads GENERAL DESCRIPTION The ADP2370/ADP2371 are high efficiency, low quiescent current, 800 mA buck (step-down) dc-to-dc converters in small 8-lead, 3 mm × 3 mm LFCSP (QFN) packages. The total solution requires only three tiny external components. The buck regulator uses a proprietary high speed current mode, constant frequency PWM control scheme for excellent stability and transient response. The need for an external rectifier is eliminated by using a high efficiency synchronous rectifier architecture. To ensure the longest battery life in portable applications, the ADP2370/ADP2371 employ a power saving variable frequency mode that reduces the switching frequ...