LM5009A_15 Datasheet, PDF (10/24 Pages) Texas Instruments – 100-V 150-mA Constant On-Time Buck Switching Regulator

LM5009A
SNVS608G – JUNE 2009 – REVISED FEBRUARY 2013
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Thermal Protection
The LM5009A should be operated so the junction temperature does not exceed 125°C during normal operation.
An internal Thermal Shutdown circuit is provided to shutdown the LM5009A in the event of a higher than normal
junction temperature. When activated, typically at 165°C, the controller is forced into a low power reset state by
disabling the buck switch. This feature prevents catastrophic failures from accidental device overheating. When
the junction temperature reduces below 140°C (typical hysteresis = 25°C) normal operation is resumed.
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