3A 400KHz Synchronous Rectified
High-side Gate Drive Boost Input.BS suppliers the drive for the high-side N-Channel
MOSFET switch. Connect a 0.01uF or greater capacitor from SW to BS to power the high-
Power Input. Input with a 4.75~23V power source. Bypass IN to GND with a suitably large
capacitor to eliminate noise on the input to the IC.
Power Switching Output. Switching mode that supplies power to the output. Connect the
output LC filter from SW to the output load.
Ground, connect Exposed Pad to Pin4
Feedback Input. FB senses the output voltage to regulate that voltage. Drive FB with a
resistive voltage divider from the output voltage.
Compensation mode. COMP is used to compensate the regulation control loop. Connect a
series RC network from COMP to GND to compensate the regulation control loop.
Enable Input.EN is digital input that turns the regulator on or off. Drive EN high to turn on the
regulator. Drive it low to turn it off.Pull up with 100Kω resistor for automatic startup.
Soft-start control Input. SS controls the soft-start period.Connect a capacitor from SS to GND
to set the soft-start period. A 0.01uF capacitor sets the soft-start period to 15ms. To disable
the soft-start feature, leave SS unconnected.