US431L/431AL

2-3

Rev. 1.2

5/11/98

Pin Descriptions

Pin Descriptions

BLOCK DIAGRAM

BLOCK DIAGRAM

Figure 1 - Simplified block diagram of the US431L

431blk1-1.0

+

Cathode

1.24V

Anode

Ref

SOT 23

TO 92

8 PIN

SOIC

PIN#

PIN#

PIN#

PIN SYMBOL

4

1

8

Ref

3

3

1

Cathode

5

2

3,6

Anode

1,2

NA

2,4,5,7

NC

Pin Description

A resistor divider from this pin to the Cathode pin and

ground sets the output voltage.

The output of the shunt regulator .A minimum of 1uF

capacitor must be connected from this pin to Anode pin

to insure unconditional stability.

Ground pin. This pin must be connected to the lowest

potential in the system & all other pins must be at higher

potential with respect to this pin.

These pins are not connected internally.