WPCT210

Data Sheet FEATURES High Voltage, 1.2 MHz/600 kHz, 800 mA, Low Quiescent Current Buck Regulator ADP2370/ADP2371 TYPICAL APPLICATION CIRCUIT VIN = 6V CIN 10µF POWER GOOD 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 Figure 1. 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 frequency under light load conditions. The ADP2370/ADP2371 operate from input voltages of 3.2 V to 15 V allowing the use of multiple alkaline/NiMH, lithium cells, or other standard power sources. The ADP2370/ADP2371 offer multiple options for setting the operational frequency. The ADP2370/ADP2371 can be synchronized to a 600 kHz to 1.2 MHz external clock or it can be forced to operate at 600 kHz or 1.2 MHz via the FSEL pin. The ADP2370/ ADP2371 can be forced ...