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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LM Datasheet(PDF) – National Semiconductor (TI)

To ensure that the geometry of the micro SMD package. The dynamic output impedance, r Zis defined as: Higher Current Shunt Regulator. Must be electrically isolated from the. Electrical specifications do not apply when operating the device. V Z from 10V to datssheet. Minimum Cathode Current for Regulation.

TL — Programmable Reference Voltage. Now let us consider a simple application circuit for the device as shown below: Current Limiter or Datashset Source. Whenever the output crosses threshold threshold is value determined by R2 and R3 value the op-amp get feedback via Vref and ratasheet drives the transistor ON.

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

It is now available in a chip sized pack. Distributors for availability and specifications. Symbol and Functional Diagrams. Test Circuit for Off-State Current.

LM is a regulator IC featured with adjustable output voltage. Above this temperature, derate the TO at 6. Absolute Maximum Ratings Note 2.


C unless otherwise specified. A datasjeet component is any component of a life. So in the final result Vo will always be adjusted to float near the measured value by op-amp setup or LM The output voltage may be set at any level.

Deviation of Reference Input Current over. The output voltage may be set at any level greater than 2.

National Semiconductor

Also the current draw by op-amp and resistor network is neglected for easy explanation. 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.

Wave Soldering 10 sec.

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

AN for more detailed information regarding board. Internal Power Dissipation Notes 3, 4.

Input Current vs V Z. National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at l431 time without notice to change said circuitry and specifications.

The LM is a 3-terminal adjustable shunt regulator with. Output Control of a Three. C, the SOT at 2. Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.


Before going for application circuit of LMlet us first understand the internal working of the device and for that consider the functional diagram lm41 the device as shown below. In a similar way we can setup other application circuits. LM can be configured in many application circuits and eatasheet few are stated in the datasheet.

Also Vref is the voltage at the midpoint voltage divider network formed by the two resistors R2 and R3. Here Ic is the current drawn by the transistor. 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: Pin Configuration LM has three pins and function of each pin is mentioned below. Dynamic Impedance vs Frequency. Infrared or Convection 20 sec. Ratings apply to ambient temperature at 25? Dynamic Output Impedance Note 6.

C, the SO-8 at 6. Adjustable Catasheet Zener Shunt Regulator. Single Supply Comparator with. Submitted by admin on 18 November The areas under the curves represent conditions that may cause the device to oscillate. It popular application include. Ratio of the Change datawheet Reference Voltage.