Data Sheet

LM431SA / LM431SB / LM431SC — Programmable Shunt Regulator
www.onsemi.com
2
Block Diagram
Figure 1. Block Diagram
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:
2. The
rmal resistance test board
Size: 1.6 mm x 76.2 mm x 114.3 mm (1S0P)
JEDEC Standard: JESD51-3, JESD51-7.
3. Assume no ambient airflow.
4.
T
JMAX
= 150
°
C; ratings apply to ambient temperature at 25
°
C.
5. 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. ON 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 to +150 mA
I
REF
Reference Input Current Range -0.05 to +10.00 mA
R
θ
JA
Thermal Resistance
Junction-Air
(2,3)
ML Suffix Package (SOT-89) 220
°
C/WMF Suffix Package (SOT-23F) 350
M32, M3 Suffix Package (SOT-23) 400
P
D
Power Dissipation
(4,5)
ML Suffix Package (SOT-89) 560
mWMF Suffix Package (SOT-23F) 350
M32, M3 Suffix Package (SOT-23) 310
T
J
Junction Temperature 150
°
C
T
OPR
Operating Temperature
Range
All products except LM431SAIMFX -25 to +85
°
C
LM431SAIMFX -40 to +85
T
STG
Storage Temperature Range -65 to +150
°
C
Symbol Parameter Min. Max. Unit
V
KA
Cathode Voltage V
REF
36 V
I
KA
Cathode Current 1 100 mA
+
-