Product Summary

The LM431CIM is a 3-terminal adjustable shunt regulator with guaranteed temperature stability over the entire temperature range of operation. The LM431CIM is now available in a chip sized package (4-Bump micro SMD) using National’s micro SMD package technology. The output voltage may be set at any level greater than 2.5V (VREF) up to 36V merely by selecting two external resistors that act as a voltage divided network. Due to the sharp turn-on characteristics, the LM431CIM is an excellent replacement for many zener diode applications.

Parametrics

LM431CIM absolute maximum ratings: (1)Storage Temperature Range: -65℃ to +150℃; (2)Operating Temperature Range Industrial: -40℃ to +85℃; (3)Soldering Information Infrared or Convection (20 sec.): 235℃; (4)Wave Soldering (10 sec.): 260℃ (lead temp.); (5)Cathode Voltage: 37V; (6)Continuous Cathode Current: 10 mA to +150 mA; (7)Reference Voltage: -0.5V; (8)Reference Input Current: 10 mA; (9)Internal Power Dissipation: 0.81W.

Features

LM431CIM features: (1)Average temperature coefficient 50 ppm/℃; (2)Temperature compensated for operation over the full temperature range; (3)Programmable output voltage; (4)Fast turn-on response; (5)Low output noise; (6)in micro SMD package; (7)See AN-1112 for micro SMD considerations.

Diagrams

LM431CIM block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
LM431CIM
LM431CIM

National Semiconductor (TI)

Voltage & Current References

Data Sheet

0-1330: $0.28
1330-2565: $0.26
2565-5035: $0.24
5035-10070: $0.23
LM431CIM/NOPB
LM431CIM/NOPB

National Semiconductor (TI)

Voltage & Current References

Data Sheet

0-1: $0.58
1-25: $0.45
25-100: $0.39
100-250: $0.34
LM431CIM3/NOPB
LM431CIM3/NOPB

National Semiconductor (TI)

Voltage & Current References ADJ PREC ZENER SHUNT REG

Data Sheet

0-1: $0.64
1-25: $0.49
25-100: $0.43
100-250: $0.37
LM431CIM3
LM431CIM3

National Semiconductor (TI)

Voltage & Current References

Data Sheet

0-1000: $0.23
1000-2000: $0.23
2000-3000: $0.21
3000-5000: $0.19
LM431CIM3X
LM431CIM3X

National Semiconductor (TI)

Voltage & Current References

Data Sheet

0-3000: $0.21
3000-6000: $0.19
6000-12000: $0.18
LM431CIM_Q
LM431CIM_Q

Fairchild Semiconductor

Voltage & Current References Shunt Regulator 2.5V Programmable

Data Sheet

Negotiable 
LM431CIM3X/NOPB
LM431CIM3X/NOPB

National Semiconductor (TI)

Voltage & Current References

Data Sheet

0-1: $0.55
1-25: $0.43
25-100: $0.39
100-250: $0.34
LM431CIMX
LM431CIMX

Fairchild Semiconductor

Voltage & Current References Shunt Regulator 2.5V Programmable

Data Sheet

0-1: $0.28
1-25: $0.19
25-100: $0.16
100-250: $0.15