Product Summary

The LM431ACM is a 3-terminal adjustable shunt regulator with guaranteed temperature stability over the entire temperature range of operation. The LM431ACM 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 LM431ACM is an excellent replacement for many zener diode applications.

Parametrics

LM431ACM absolute maximum ratings: (1)Storage Temperature Range: -65℃ to +150℃; (2)Operating Temperature Range Commercial: 0℃ to +70℃; (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: 0.78W.

Features

LM431ACM 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

LM431ACM block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
LM431ACM
LM431ACM

National Semiconductor (TI)

Voltage & Current References

Data Sheet

0-1995: $0.15
1995-2565: $0.14
2565-5035: $0.13
5035-10070: $0.12
LM431ACM/NOPB
LM431ACM/NOPB

National Semiconductor (TI)

Voltage & Current References

Data Sheet

0-1: $0.37
1-25: $0.29
25-100: $0.25
100-250: $0.22
LM431ACM3/NOPB
LM431ACM3/NOPB

National Semiconductor (TI)

Voltage & Current References ADJ PREC ZENER SHUNT REG

Data Sheet

0-1: $0.50
1-25: $0.39
25-100: $0.34
100-250: $0.30
LM431ACM3X
LM431ACM3X

National Semiconductor (TI)

Voltage & Current References

Data Sheet

0-3000: $0.17
3000-6000: $0.16
6000-12000: $0.12
LM431ACM3
LM431ACM3

National Semiconductor (TI)

Voltage & Current References

Data Sheet

0-1000: $0.19
1000-2000: $0.19
2000-3000: $0.17
3000-5000: $0.16
LM431ACM_Q
LM431ACM_Q

Fairchild Semiconductor

Voltage & Current References Program Shunt Reg

Data Sheet

Negotiable 
LM431ACMX/NOPB
LM431ACMX/NOPB

National Semiconductor (TI)

Voltage & Current References

Data Sheet

0-1: $0.37
1-25: $0.29
25-100: $0.25
100-250: $0.22
LM431ACMX
LM431ACMX

Fairchild Semiconductor

Voltage & Current References SOP-8 Shunt

Data Sheet

0-1: $0.30
1-25: $0.20
25-100: $0.17
100-250: $0.15