Pin Configurations

Figure 2 Pin Configuration of FAC1591 (Top View)

Pin Description

Pin Number Pin Name Description

1,6, 8

NC

Not Connect.

2

Vin

Supply Voltage Input Pin. FAC1591operates from a 3.6V to 32V

DC voltage. Bypass Vin to GND with a suitably large capacitor

to eliminate noise on the input.

3

SW

Power Switch Output Pin. SW is the switch node that supplies

power to the output.

4

GND

Ground Pin. Care must be taken in layout. This pin should be

placed outside of the Schottky Diode to output capacitor ground

path to prevent switching current spikes from inducing voltage

noise into FAC1591.

5

FB

Feedback Pin. Through an external resistor divider network, FB

senses the output voltage and regulates it. The feedback

threshold voltage is 1.222V.

7

EN

Enable Pin. EN is a digital input that turns the regulator on or

off .Drive EN pin high to turn on the device, drive it low to turn

it off.

Ordering Information

X

X

FAC1591

Circuit Type

Package

F:

SOP8

Packing

Blank:

Tube

R:

Type and Reel

2008.01. 28

2/12

Revision No : 0

FAC1591