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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Wave Soldering 10 sec. It is now available in a chip sized pack.

Pin Configuration LM has three pins and function of each pin is mentioned below. Symbol and Functional Diagrams. Submitted by admin on 18 November C, slope is positive. 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.

Infrared or Convection 20 sec. Internal Power Dissipation Notes 3, 4. Deviation of Reference Input Datasneet over. AN for more detailed information regarding board.

LM Zener Shunt Regulator Pinout, Features, Circuit & Datasheet

Absolute Maximum Ratings Note 2. To ensure that the geometry of the micro SMD package.

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Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. The LM is a 3-terminal adjustable shunt regulator with. LM is a regulator IC featured with adjustable output voltage. Life support devices or systems are devices or. Above this temperature, derate the TO at 6.

Test Circuit for Off-State Current. The areas under the curves represent conditions that may cause the device to oscillate.

Must be electrically isolated from the. 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. So in the final result Vo will always be adjusted to float dqtasheet the measured value by op-amp setup or LM Higher Current Shunt Regulator.

Now let us consider a simple application circuit for the device as shown below: It popular application include. Ratings apply to ambient temperature at 25? LM can be configured in many application circuits and a few are stated in the datasheet.

Dynamic Impedance vs Frequency. It is a 3-terminal shunt regulator with guaranteed temperature stability over the entire temperature range of operation. Test Circuit for Curve A Above. The dynamic output impedance, r Zis defined as: Output Control of a Three. Adjustable Precision Zener Shunt Regulator. In a similar way we can setup other application circuits.

National Semiconductor

When datasheft device is programmed with two external resistors, R1 and Datasheef, see Figure 2the dynamic output impedance of the overall circuit, r Zis defined as: Here Ic is the current drawn by the transistor. Distributors for availability and specifications.

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C, the SOT at 2. National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.

The output voltage may be set at any level. Dynamic Output Impedance Note 6.

National Semiconductor – datasheet pdf

Datashete critical component is any component of a life. Deviation of reference input voltage, V DEVis defined as the maximum variation of the reference input datasheeh over the full temperature range. V Z from 10V to 36V. C unless otherwise specified. Here reference voltage Vref is the voltage at the non-inverting terminal of the op-amp and this voltage determines whether the op-amp outputs positive voltage or not.

C, the SO-8 at 6. Minimum Cathode Current for Regulation. TL — Programmable Reference Voltage. Current Limiter or Current Source. Due to the sharp turn-on characteristics this device is an excellent replacement for many zener diode applications.