The LM5018 is a 100-V, 300-mA synchronous step-down regulator with integrated high-side
and low-side MOSFETs. The constant-on-time (COT) control scheme employed in the LM5018 device
requires no loop compensation, provides excellent transient response, and enables very low
step-down ratios. The on-time varies inversely with the input voltage resulting in nearly constant
frequency over the input voltage range. A high-voltage startup regulator provides bias power for
internal operation of the IC and for integrated gate drivers.
A peak current limit circuit protects against overload conditions. The undervoltage
lockout (UVLO) circuit allows the input undervoltage threshold and hysteresis to be independently
programmed. Other protection features include thermal shutdown and bias supply undervoltage
The LM5018 device is available in WSON-8 and SO PowerPAD-8 plastic packages.
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