LM431 DATASHEET PDF

The LM is a 3-terminal adjustable shunt regulator with guaranteed temperature stability over the entire tempera- ture range of operation The output voltage. LM Adjustable Precision Zener Shunt Regulator An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in. View LM Datasheet datasheet from Texas Instruments at Digikey.

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Before going for application circuit of LMlet us first understand the internal working of the device and for that consider the functional diagram of the device as shown below. Higher Current Shunt Regulator. The output voltage may be set at any level greater than 2. Output Control of a Three. Also Vref is the voltage at the midpoint voltage divider network formed by the two resistors R2 and R3.

It is a 3-terminal shunt regulator with guaranteed temperature stability over the entire temperature range of operation. C, slope is positive.

When the device is programmed with two external resistors, R1 and R2, see Figure 2the dynamic output impedance of the overall circuit, r Zis defined as: Ratio of the Change in Reference Voltage. Now let us consider a simple application circuit for the device as shown below: Deviation of Reference Input Voltage Over. C, the SO-8 at 6. Pin Configuration LM has three pins and function of each pin is mentioned below.

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Symbol and Functional Diagrams. Current Limiter or Current Source.

National Semiconductor

Electrical specifications do not apply when operating the device. Here Ic is the current drawn by the transistor. Dynamic Output Impedance Note 6.

The LM is a 3-terminal adjustable shunt regulator with. Also the current draw by op-amp and resistor network is neglected for easy explanation.

Above this temperature, derate the TO at 6. Test Circuit for Curve A Above. Test Circuit for Off-State Current. It is now available in a chip sized pack.

Distributors for availability and specifications. Single Supply Comparator with.

LM Zener Shunt Regulator Pinout, Features, Circuit & Datasheet

The areas under the curves represent conditions that may cause the device to oscillate. Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.

The output voltage may be set at any level. A critical component is any component of a life. The dynamic output impedance, r Zis defined as: Submitted by admin on 18 November V Z from 10V to 36V. Here reference voltage Vref is the voltage at the non-inverting l,431 of the op-amp and this voltage determines whether the op-amp outputs positive voltage or not.

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TL — Programmable Dataeheet Voltage. So in the final result Vo will always be adjusted to float near the measured value by op-amp setup or LM C unless otherwise specified. Absolute Maximum Ratings Note 2.

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Whenever the output crosses threshold threshold is value determined by R2 and R3 value the op-amp get feedback via Vref and it drives the transistor ON. Infrared or Convection 20 sec. Wave Soldering 10 sec. Internal Power Dissipation Notes 3, 4.