Microchip Technology, Inc. AC DC Converters, Offline Switches MIC3838YMM

The MIC3838YMM is a push-pull PWM control IC designed for isolated step-down DC/DC conversion applications, particularly in telecom environments with input voltages ranging from 36V to 75V. It features a dual output drive stage that enhances transformer efficiency and allows for a compact design. The device can be configured for either voltage-mode or current-mode control and includes a volt-second clamp to limit duty cycles during input transients, facilitating the use of smaller transformers and components. With a turn-on threshold of 12.5V, the MIC3838YMM operates with a typical start-up current of 130¬µA and a run current of 1mA, supporting operation frequencies up to 1MHz. The output stages can deliver 500mA peak source and 1A peak sink currents, while the adjustable dead-time between outputs ranges from 60ns to 200ns, reducing stress on external components. The IC is housed in a compact 10-pin MSOP package and operates within a temperature range of -40¬8C to +85¬8C, making it suitable for various applications including high-efficiency power supply modules and industrial power supplies.