The SE8400 is a step-down DC/DC regulator with an internal switch with a SKIP control mode that combines low static current with high switching frequency to achieve high efficiency over a wide range of load currents. SKIP mode uses a short "burst" period to switch inductive current through an internal power MOSFET, followed by a sleep period in which the power switch is off and the load current is supplied by an output capacitor. At light loads, burst cycles account for a small portion of the total cycle time, minimizing the average supply current and greatly improving efficiency at light loads.
The SE8400 has a wide input voltage range of 4.5V-45V, thus minimizing the need for external surge suppression components. Making it ideal for wide input power range industrial and high battery number applications. The SE8400 features an integrated low-resistance 0.6Ω high-side power MOSFET that delivers at least 0.6A output current capability for excellent load and line transient response.
The SE8400 can be used in a variety of applications to effectively regulate higher voltages. This regulator is ideal for the 42V automotive power bus range. Additional features include: Soft start, hot shutdown, UVLO undervoltage lock, Gate Driver Undervoltage lock, maximum Duty Limit timer, and Smart Current Limit Shutdown timer. Well and integrated output short-circuit protection,
Frequency FOLD-BACK mode is provided at low FB voltage to avoid overheating during short circuit.