Rev. 1.00

2

September 02, 2011

HT7466

Block Diagram

Pin Assignment

HT 7466

8 SO P- A

1

2

3

4

8

7

6

5

SS

BS

VI N

SW

EN

CO MP

FB

GN D

Pin Description

Pin No. Pin Name

Description

1

SS

Soft-start input.

If the soft start function is to be used then an external capacitor should be connected between

this pin and ground. If the soft start function is not required the pin should be left open.

2

BS

Internal power NMOS gate drive boost input.

A 10nF or greater value capacitor should be connected from SW to BS for additional Power

NMOS gate driving purposes.

3

VIN

Power supply input.

The input supply pin for the device, VIN, is connected to a supply voltage between 4.75V to

24V.

4

SW

Power switching output.

The internal power MOS drain is connected to the inductor, diode and VIN.

5

GND

Ground.

Device ground voltage reference.

6

FB

Feedback pin.

The feedback pin is connected to an external resistor divider to measure the output voltage.

7

COMP

Error amplifier output.

Used for compensation of the regulation control loop. Connect a series RC network from

COMP to GND to compensate the regulation control loop. The COMP pin value is 1.222V.

8

EN

Enable input.

This pin is set high to turn on the regulator and low to turn it off. The pin should be left

unconnected if not used.