The LM25019 is a 48-V, 100-mA synchronous step-down regulator with integrated high-side
and low-side MOSFETs. The constant on-time (COT) control scheme employed in the LM25019 requires no
loop compensation, provides excellent transient response, and enables very high 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 start-up 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 LM25019 is available in 8-pin WSON and 8-pin SO PowerPAD plastic packages.
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