Product Summary

The LM431BCM3X is a 3-terminal adjustable shunt regulator with guaranteed temperature stability over the entire temperature range of operation. The LM431BCM3X 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 LM431BCM3X is an excellent replacement for many zener diode applications.

Parametrics

LM431BCM3X 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

LM431BCM3X 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

LM431BCM3X block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
LM431BCM3X
LM431BCM3X

IC VREF SHUNT PREC ADJ SOT-23-3
Data Sheet
0-3000: $0.17
3000-6000: $0.16
6000-15000: $0.16
15000-30000: $0.15
30000-75000: $0.15
75000-150000: $0.14
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