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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So in the final result Vo will always be adjusted to float near the measured value by op-amp setup or LM 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: It popular application ratasheet.

Above this temperature, derate the TO at 6. Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.

Pin Configuration LM has three pins and function of each pin is mentioned below. Distributors for availability and specifications. The dynamic output impedance, r Zis defined as: A critical component is any component of a life. C, the SOT at 2.

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LM Zener Shunt Regulator Pinout, Features, Circuit & Datasheet

Also the current draw by op-amp and resistor network is neglected for easy explanation. Internal Power Dissipation Notes 3, 4. Due to the sharp turn-on characteristics this device is an excellent replacement for many zener diode applications.

V Z from 10V to 36V. 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.

Also Vref is the voltage at the midpoint voltage divider network formed by the two resistors R2 and R3. 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. Input Current vs V Z.

National Semiconductor

Life support devices or systems are devices or. AN for more detailed information regarding board.

Ratio of the Change in Reference Voltage. When the transistor turns ON the device draws current and because of this current drawing a voltage drop appears across R1 resistor which is in series with voltage source V1. Test Circuit for Curve A Above. LM can be configured in many application circuits and a few are stated in the datasheet. National does datashet assume any responsibility for use of any circuitry described, no circuit patent licenses lm4311 implied and National reserves the right at any time without notice to change said circuitry and specifications.

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Adjustable Precision Zener Shunt Regulator. The LM is a 3-terminal adjustable shunt regulator with. Dynamic Impedance vs Frequency. Minimum Cathode Current for Regulation.

National Semiconductor – datasheet pdf

Submitted by admin on 18 November To ensure that the geometry of the micro SMD package. Test Circuit for Off-State Current. Dynamic Output Impedance Note 6. C unless otherwise specified. Infrared or Convection 20 sec. The output voltage may be set dqtasheet any level greater than 2. Higher Current Shunt Regulator. Deviation of Reference Input Current over.

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