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SNVS280H – APRIL 2004 – REVISED DECEMBER 2016 LM5008 High-Voltage, 100-V Step-Down Switching Regulator
1 Features 3 Description The LM5008 step-down switching regulator features
all of the functions needed to implement a low-cost,
efficient, buck bias regulator. This high voltage
regulator contains an 100-V N-channel buck switch.
The device is easy to implement and is provided in
the 8-pin VSSOP and the thermally enhanced 8-pin
WSON packages. The regulator is based on a
hysteretic control scheme using an on-time inversely
proportional to VIN. This feature allows the operating
frequency to remain relatively constant. The
hysteretic control requires no loop compensation. An
intelligent current limit is implemented with forced offtime, which is inversely proportional to VOUT. This
scheme ensures short-circuit protection while
providing minimum foldback. Other protection
features include: thermal shutdown, VCC undervoltage
lockout, gate drive undervoltage lockout, and …