They are designed for local regulation on digital logic cards, eliminating the distribution problems association with single-point regulation. The devices are available in two standard transistor packages. In the solid-kovar TO-5 header, it can deliver output currents in excess of mA, if adequate heat sinking is provided. With the TO-3 power package, the available output current is greater than 1A. The regulators are essentially blowout proof. Current limiting is included to limit the peak output current to a safe value.
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April General Description. The LM series are complete 5V regulators fabricated on. They are designed for local regulation. The devices are. In the. The regulators are essentially blowout proof. Current limiting. If internal dissipation becomes too great, the. Considerable effort was expended to make these devices. It is not necessary to bypass the output, although this. Input bypass-. Stability is also. Although designed primarily as a fixed-voltage regulator, the.
It is also possible to use the circuits as the control. Schematic Diagram. Absolute Maximum Ratings Note 1. Distributors for availability and specifications. Input Voltage. Power Dissipation. Internally Limited. Operating Junction Temperature Range. Storage Temperature Range. Lead Temperature. Soldering, 10 sec. Electrical Characteristics Note 2. Output Voltage. Line Regulation. Load Regulation. TO Package. TO-3 Package. Quiescent Current.
Quiescent Current Change. Output Noise Voltage. Long Term Stability. Ripple Rejection. Thermal Resistance,. Junction to Case.
Note 3. Min Typ Max. Operating Ratings indicate conditions for which the device is. With a heat. Connection Diagrams. Metal Can Packages. Download LM Datasheet. They are designed for local regulation on digital logic cards, eliminating the distribution problems association with single-point regulation. The devices are available in two standard transistor packages. In the solid-kovar TO-5 header, it can deliver output currents in ex- cess of mA, if adequate heat sinking is provided. With the TO-3 power package, the available output current is greater than 1A.
Current limiting is included to limit the peak output current to a safe value. In addition, thermal shutdown is provided to keep the IC from overheating. If internal dissipation becomes too great, the regulator will shut down to prevent excessive heating. Considerable effort was expended to make these devices easy to use and to minimize the number of external compo- nents. It is not necessary to bypass the output, although this does improve transient response somewhat.
Input bypass- ing is needed, however, if the regulator is located very far from the filter capacitor of the power supply. Stability is also achieved by methods that provide very good rejection of load or line transients as are usually seen with TTL logic. Although designed primarily as a fixed-voltage regulator, the output of the LM series can be set to voltages above 5V, as shown.
It is also possible to use the circuits as the control element in precision regulators, taking advantage of the good current-handling capability and the thermal overload protection. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits.
With a heat sink, the effective thermal resistance can only approach the values specified, depending on the efficiency of the sink.
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