WPCT210 Datasheet | Nuvoton Technology

Data Sheet Features High Voltage, 1.2 MHz/600 k Hz, 800 m A, 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 m A 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 ponents. 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/Ni MH, 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 k Hz to 1.2 MHz external clock or it can be forced to operate at 600 k Hz or 1.2 MHz via the FSEL pin. The ADP2370/ ADP2371 can be forced to operate in PWM mode (FPWM) when noise considerations are more important than efficiency. A power-good output is available to indicate when the output voltage is below 92% of its nominal value. The ADP2371 is identical to the ADP2370 except that the ADP2371 includes the addition of an integrated switched resistor, quick output discharge function (QOD) that automatically discharges the output when the device is disabled. Both devices include an internal power switch and a synchronous...