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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It popular application include. LM can be configured in many application circuits and a few are stated in the datasheet. Distributors for availability and specifications.

Dataeheet Z from 10V to 36V. It is now available in a chip sized pack. 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.

National Semiconductor

The output voltage may be set at any level greater than ln431. The dynamic output impedance, r Zis defined as: Current Limiter or Current Source. AN for more detailed information regarding board. Test Circuit for Off-State Current. Test Circuit for Curve A Above.

In a similar way we can setup other application circuits. Now let us consider a simple application circuit for the device as shown below: Dynamic Output Impedance Note 6. Ratio of the Change in Reference Voltage. A critical component is any component of a life.


Submitted by admin on 18 November Electrical specifications do not apply when operating the device.

C unless otherwise specified. Input Current vs V Z. Also the current draw by op-amp and resistor network is neglected for easy explanation. Infrared or Convection 20 sec. Deviation of Reference Input Voltage Over. C, slope is positive. Ratings apply to ambient temperature at 25?

Above this temperature, derate the TO at 6. Pin Configuration LM has three pins and function of each pin is mentioned below. Absolute Maximum Ratings indicate limits beyond dztasheet damage to the device may occur. TL — Programmable Reference Voltage. The output voltage may be set at any level.

Life support devices or systems are devices or. Also Vref is the voltage at the midpoint voltage divider network formed by the two resistors R2 datasbeet R3. Symbol and Functional Diagrams. Dynamic Impedance vs Frequency.

Absolute Maximum Ratings Note 2. Higher Current Shunt Regulator. Must be electrically isolated from the. Single Supply Comparator with. Here Ic is the current drawn by the transistor.

LM Datasheet(PDF) – National Semiconductor (TI)

Minimum Cathode Current for Regulation. The areas under the curves represent conditions that may cause the device to oscillate. Internal Power Dissipation Notes 3, 4. 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.


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.

C, the SO-8 at 6.

Deviation of reference input voltage, V DEVis defined as the maximum variation of the reference input voltage over the full temperature range. C, the SOT at 2.

To ensure that the geometry of the micro SMD package. Wave Soldering 10 sec.

It is a 3-terminal shunt regulator with guaranteed temperature stability over the entire temperature range of operation. Due to the sharp turn-on characteristics this device is an excellent replacement for many zener diode applications.

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. 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: The LM is a 3-terminal adjustable shunt regulator with.