Microchip Technology, Inc. DC DC Switching Controllers MIC38HC43-1YN

The MIC38HC43-1YN is a fixed frequency current-mode PWM controller designed for high efficiency in DC-DC conversion applications. It features a peak output drive current of 1A and operates within a temperature range of -40¬8C to +85¬8C. The device has a low start-up current of 50¬µA and a typical operating current of 4mA, making it suitable for energy-sensitive applications. This controller supports a wide input voltage range, starting at 8.4V with a minimum operating voltage of 7.6V, and can handle input voltages up to 20V. It is capable of current-mode operation at frequencies up to 500kHz and offers fast output rise and fall times of 20ns and 15ns, respectively. The MIC38HC43-1YN is pin-compatible with UC3843, allowing for easy integration into existing designs. Applications for this controller include off-line switched-mode power supplies, DC-DC converters, and various types of voltage regulation such as buck, boost, and flyback converters. Its compact 14-pin DIP package facilitates efficient layout and design in space-constrained environments.