SDB628 固定频率,电流模式升压变换IC.pdf

Shouding SDB628 High Efficiency 1.2MHz 2A Step Up Converter FEATURES GENERAL DESCRIPTION The SDB628 is a constant frequency, 6-pin SOT23 • Integrated 80mΩ Power MOSFET The SDB628 • 2V to 24V Input Voltage current mode step-up converter intended for small, • 1.2MHz Fixed Switching Frequency low power applications. The SDB628 switches at • Internal 4A Switch Current Limit 1.2MHz and allows the use of tiny, low cost • Adjustable Output Voltage capacitors and inductors 2mm or less in height. • Internal Compensation Internal soft-start results in small inrush current and • Up to 28V Output Voltage extends battery life. • Automatic Pulse Frequency Modulation The SDB628 features automatic shifting to pulse Mode at Light Loads frequency modulation mode at light loads. The • up to 97% Efficiency SDB628 includes under-voltage lockout, current • Available in a 6-Pin SOT23-6 Package limiting, and thermal overload protection to prevent damage in the event of an output overload. The SDB628 is available in a small 6-pin SOT-23 APPLICATIONS package. • Battery-Powered E