DC1560A

LTM8048 DC to DC Converter and Switching Regulator Chip 4.85VDC to 5.15VDC/5.7VDC to 6.3VDC Output Demonstration Circuit

The is a demonstration board for LTM8048 DC to DC µModule regulator. The LTM8048 is an isolated flyback µModule DC to DC converter with LDO post regulator. The LTM8048 has an isolation rating of 725Vd. Included in the IC package are the switching controller, power switches, transformer and all support components. The demonstration board is designed for a 6V flyback output and a 5V post regulator output from a 4.5V to 30V input. The typical current capability of the 6V flyback output varies with input voltage from about 110mA at VIN = 4.5V to about 370mA at VIN = 30V. The VOUT2 is the LDO post regulator from VOUT1. The current capability of VOUT2 is limited by either the current capability of VOUT1 minus VOUT1 loading or the 300mA current limit on the LDO post regulator itself. The two stage converter provides an isolated flyback output as well as a low noise LDO output.

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Current mode control

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Programmable soft start

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User configurable undervoltage lockout

If there is no output, temporarily disconnect the load to make sure that the load is not set too high.