Product Summary

The LM431BCM3X/NOPB is a 3-terminal adjustable shunt regulator with guaranteed temperature stability over the entire temperature range of operation. It is now available in a chip sized package (4-Bump micro SMD) using Nationals micro SMD package technology. The output voltage of the LM431BCM3X/NOPB 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 this LM431BCM3X/NOPB is an excellent replacement for many zener diode applications.

Parametrics

LM431BCM3X/NOPB absolute maximum ratings: (1)Storage Temperature Range: -65℃ to +150℃; (2)Operating Temperature Range: Industrial (LM431xI): -40℃ to +85℃; Commercial (LM431xC): 0℃ to +70℃; (3)Soldering Information: Infrared or Convection (20 sec.): 235℃; Wave Soldering (10 sec.): 260℃ (lead temp.); (4)Cathode Voltage: 37V; (5)Continuous Cathode Current: -10 mA to +150mA; (6)Reference Voltage: -0.5V; (7)Reference Input Current: 10 mA; (8)Internal Power Dissipation: TO-92 Package: 0.78W; SO-8 Package: 0.81W; SOT-23 Package: 0.28W; micro SMD Package 0.30W.

Features

LM431BCM3X/NOPB features: (1)Average temperature coefficient 50 ppm/℃; (2)Temperature compensated for operatioover the full temperature range; (3)Programmable output voltage; (4)Fast turn-oresponse; (5)Low output noise; (6)LM431 imicro SMD package; (7)See AN-1112 for micro SMD considerations.

Diagrams

LM431BCM3X/NOPB Symbol and Functional Diagrams

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
LM431BCM3X/NOPB
LM431BCM3X/NOPB
National Semiconductor (TI)
Voltage & Current References
Data Sheet
0-1: $0.48
1-25: $0.37
25-100: $0.32
100-250: $0.28
Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
LM431AIM
LM431AIM
National Semiconductor (TI)
Voltage & Current References
Data Sheet
0-2185: $0.16
2185-5035: $0.15
5035-10070: $0.14
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
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
LM431ACN
LM431ACN
Fairchild Semiconductor
Voltage & Current References
Data Sheet
Negotiable 
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
LM431BCM3X/NOPB
LM431BCM3X/NOPB
National Semiconductor (TI)
Voltage & Current References
Data Sheet
0-1: $0.48
1-25: $0.37
25-100: $0.32
100-250: $0.28