US431L/431AL
Pin Descr ipt ions
SOT 23
TO 92
8 PIN
SOIC
PIN#
8
Pin Description
PIN#
4
PIN#
1
PIN SYMBOL
A resistor divider from this pin to the Cathode pin and
ground sets the output voltage.
Ref
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.
3
3
1
Cathode
Anode
NC
5
2
3,6
These pins are not connected internally.
1,2
NA
2,4,5,7
BLOCK DIAGRAM
Cathode
Ref
+
1.24V
431blk1-1.0
Anode
Figure 1 - Simplified block diagram of the US431L
Rev. 1.2
5/11/98
2-3
UNISEM [ UNISEM ]
