IC VREF SHUNT 36V 2% TO92-3 LM431 is an adjustable precision zener shunt regulator.
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Jul 24, 2021
Edmund Irving
LM431 shunt regulator trimpot controlled power supply above set voltage indicator test circuit
LM431 is an adjustable precision zener shunt regulator. This article mainly introduce its circuit, pinout, datasheet and other detailed information about On Semiconductor LM431.
LM431AIZ
| Quantity | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.37494 | $0.37 |
| 10+ | $0.35371 | $3.54 |
| 100+ | $0.33369 | $33.37 |
| 500+ | $0.3148 | $157.4 |
| 1000+ | $0.29699 | $296.99 |
The LM431 is a three terminal adjustable shunt regulator.It is available in space-saving SOIC-8, SOT-23, and TO-92 packages. The main feature of this IC is a changeable output voltage, and the temperature strength is guaranteed over the entire temperature range of operation.The output voltage of this IC is may be ranged from the above 2.5V to 36V only by choosing two exterior resistors that perform like a voltage separated network. Due to the quickly activate characteristics, this IC is an outstanding alternative for several applications of zener diode. The similar components of this IC mainly include LM432, NJM2821, ZXRE060. NJM2822, NJM2820, This article discusses an introduction of IC LM 431.
Footprint
★ Low-Output Noise
★ Fast Turnon Response
★ Programmable Output Voltage
★ Low-Dynamic Output Impedance
★ Average Temperature Coefficient 50 ppm/°C
★ Available in Space-Saving SOIC-8, SOT-23, and TO92 packages
★ Temperature Compensated for Operation Over the Full Temperature Range
ON Semiconductor LM431AIZ technical specifications, attributes, parameters and parts with similar specifications to ON Semiconductor LM431AIZ.
ON Semiconductor LM431AIZ technical specifications, attributes, parameters and parts with similar specifications to ON Semiconductor LM431AIZ.
| Product Attribute | Attribute Value | |
|---|---|---|
| Lifecycle Status | ACTIVE (Last Updated: 1 day ago) | |
| Factory Lead Time | 15 Weeks | |
| Mount | Through Hole | |
| Mounting Type | Through Hole | |
| Package / Case | TO-226-3, TO-92-3 (TO-226AA) | |
| Number of Pins | 3Pins | |
| Weight | 179mg | |
| Operating Temperature | -40°C~85°C TA | |
| Packaging | Bulk | |
| Published | 2012 | |
| Tolerance | ±2% | |
| JESD-609 Code | e3 | |
| Pbfree Code | yes | |
| Part Status | Active | |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Product Attribute | Attribute Value | |
|---|---|---|
| Number of Terminations | 3Terminations | |
| ECCN Code | EAR99 | |
| Temperature Coefficient | 50ppm/°C Typical | |
| Terminal Finish | Tin (Sn) | |
| Terminal Position | BOTTOM | |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED | |
| Number of Functions | 1Function | |
| Terminal Pitch | 1.27mm | |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED | |
| Base Part Number | LM431 | |
| Number of Outputs | 1Output | |
| Qualification Status | Not Qualified | |
| Output Voltage | 36V | |
| Output Type | Adjustable | |
| Max Output Current | 100mA |
| Product Attribute | Attribute Value | |
|---|---|---|
| Trim/Adjustable Output | YES | |
| Analog IC - Other Type | TWO TERMINAL VOLTAGE REFERENCE | |
| Max Output Voltage | 36V | |
| Max Input Voltage | 36V | |
| Reference Type | Shunt | |
| Min Output Voltage | 2.5V | |
| Temp Coef of Voltage-Max | 54.4 ppm/°C | |
| Current - Cathode | 1mA | |
| Height | 5.33mm | |
| Length | 5.2mm | |
| Width | 4.19mm | |
| RoHS Status | ROHS3 Compliant | |
| Lead Free | Lead Free |
Before going for application circuit of LM431, let us first understand the internal working of the device and for that consider the functional diagram of the device as shown below.
In the LM431 functional diagram we have three main devices namely Op-amp, NPN transistor and +2.5V voltage source. Based on the working of the op-amp, the output voltage Vo/p will be positive only when Vref >+2.5V because voltage at inverting terminal of op-amp is +2.5V.
Now let us consider a simple application circuit for the device as shown below:
★ Adjustable voltage and current linear as well as switching power supplies
★ Monitor the voltage
★ Current source and sink circuits
★ Require precision references circuits
★ Can replace zener diodes
ON Semiconductor is a semiconductor supplier company whose products include power and signal management, logic, discrete and custom devices for automotive, communications, computing, consumer, industrial, LED lighting, medical, military/aerospace, and power applications. ON Semiconductor operates a network of manufacturing facilities, sales offices, and design centers in North America, Europe, and Asia Pacific.
Download datasheets and manufacturer documentation for ON Semiconductor LM431AIZ.
Download datasheets and manufacturer documentation for LM431AIZ
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