2019. 01. 04

2/7

Revision No : 0

FTD1466

Pin Description

Pin Number

Pin Name Description

1

BST

Bootstrap. Connect a capacitor between the SW and BS pins to form a floating supply across

the power switch driver. This capacitor drives the power switch’s gate above the supply

voltage.

2

GND

Ground. Voltage reference for the regulated output voltage. Requires special layout

considerations. Isolate this node from the D1 to C1 ground path to prevent switching current

spikes from inducing.

3

FB

Feedback. Sets the output voltage. Connect to the tap of an external resistor divider from the

output to GND. The frequency foldback comparator lowers the oscillator frequency when the

FB voltage is below 300mV to prevent current-limit runaway during a short-circuit fault.

4

EN

a 1MΩ resistor.

5

VIN

Supply Voltage. The FTD1466 operates from a 10V-to-60V unregulated input. Requires C1 to

prevent large voltage spikes from appearing at the input.

6

SW

Power Switching Output. It is the Drain of the N-Channel power MOSFET to supply power to

the output LC filter.