Product Summary

The LM431ACZ is a 3-terminal adjustable shunt regulator with guaranteed temperature stability over the entire temperature range of operation. The LM431ACZ 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 LM431ACZ is an excellent replacement for many zener diode applications.

Parametrics

LM431ACZ 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

LM431ACZ 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

LM431ACZ block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
LM431ACZ
LM431ACZ

Fairchild Semiconductor

Voltage & Current References Program Shunt Reg

Data Sheet

0-1: $0.09
1-25: $0.08
25-100: $0.08
100-250: $0.07
LM431ACZ/LFT3
LM431ACZ/LFT3

National Semiconductor (TI)

Voltage & Current References

Data Sheet

0-2000: $0.17
2000-4000: $0.17
4000-6000: $0.16
6000-10000: $0.15
LM431ACZX
LM431ACZX

Fairchild Semiconductor

Voltage & Current References TO-92 Shunt

Data Sheet

0-1: $0.24
1-25: $0.13
25-100: $0.10
100-250: $0.07
LM431ACZ/NOPB
LM431ACZ/NOPB

National Semiconductor (TI)

Voltage & Current References

Data Sheet

0-1: $0.46
1-25: $0.32
25-100: $0.31
100-250: $0.27
LM431ACZXA
LM431ACZXA

Fairchild Semiconductor

Voltage & Current References Shunt Regulator 2.5V Programmable

Data Sheet

0-1: $0.07
1-25: $0.06
25-100: $0.05
100-250: $0.05
LM431ACZ/LFT4
LM431ACZ/LFT4

National Semiconductor (TI)

Voltage & Current References

Data Sheet

0-2000: $0.17
2000-4000: $0.17
4000-6000: $0.16
6000-10000: $0.15