Data Sheet

KA431S / KA431SA / KA431SL — Programmable Shunt Regulator
© 2002 Fairchild Semiconductor Corporation www.fairchildsemi.com
KA431S / KA431SA / KA431SL Rev. 6.7 3
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be opera-
ble above the recommended operating conditions and stressing the parts to these levels is not recommended. In addi-
tion, extended exposure to stresses above the recommended operating conditions may affect device reliability. The
absolute maximum ratings are stress ratings only. Values are at T
A
= 25°C unless otherwise noted.
Notes:
1. Thermal resistance test board
Size: 1.6mm x 76.2mm x 114.3mm (1S0P)
JEDEC Standard: JESD51-3, JESD51-7.
2. Assume no ambient airflow.
3. T
JMAX
= 150
°
C; Ratings apply to ambient temperature at 25
°
C.
4. Power dissipation calculation: P
D
= (T
J
- T
A
) / R
θJA.
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not
recommend exceeding them or designing to Absolute Maximum Ratings.
Symbol Parameter Value Unit
V
KA
Cathode Voltage 37 V
I
KA
Cathode Current Range (Continuous) -100 ~ +150 mA
I
REF
Reference Input Current Range -0.05 ~ +10 mA
R
θJA
Thermal Resistance Junction-Air
(1,2)
MF Suffix Package
350 °C/W
P
D
Power Dissipation
(3,4)
MF Suffix Package
350 mW
T
J
Junction Temperature 150 °C
T
OPR
Operating Temperature Range -25 ~ +85 °C
T
STG
Storage Temperature Range -65 ~ +150 °C
Symbol Parameter Min. Max. Unit
V
KA
Cathode Voltage V
REF
36 V
I
KA
Cathode Current 1 100 mA