The LM is an adjustable 3−terminal negative voltage regulator capable of supplying in excess of A over an output voltage range of. − V to −37 V. This. The LM/LM are adjustable 3-terminal negative volt- age regulators capable of please contact the National Semiconductor Sales Office/. Distributors for. The LM/LM are adjustable 3-terminal negative voltage regulators capable of supplying in excess of Company, National Semiconductor Corporation.

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Archived from the original PDF natoinal 18 April This is the trade-off for using linear regulators which are a simple way to provide a stable voltage with few additional components. F, D1 protects the LM in case the input.

V OUTper Watt, within the first 10 ms after a step of power is. K, MP and T Package. Electrical Characteristics Note 1. Standard 3-lead transistor package. The LM has three pins: Thermal Resistance, Junction to. Linear regulators inherently waste power, the power dissipated is the current passed multiplied by the voltage difference between input and output. Like the LM, each of the 78xx regulators is designed to adjust the output voltage until it is some fixed voltage above the adjustment pin which in this case is labelled ” ground “.


This performance is thus well inside the specification. The thermal regulation of a. Figures 3, 4 show the information for the SOT package. Retrieved from ” https: K Steel and T Packages.

2x National Semiconductor IC LM337AT Lm337

Thermal regulation error is. Further, the LM series features internal current limiting. The device can be configured to regulate the current to a load, rather than the voltage, by replacing the low-side resistor of the divider with the load itself. Japan Customer Support Center. F solid tantalum or 10? Although power dissipation is internally limited, these specifications.

How the adjustment pin is connected determines the output voltage as follows. In Figure 2when the 10W pulse is applied for ms. Unless otherwise specified, these specifications apply ? For large voltage differences, the energy lost as heat can ultimately be greater than that provided to the circuit.

The output current is that resulting from dropping the reference voltage across the resistor. Please see AN for power enhancement techniques to. This page was last edited on 6 Julyat National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship. Metal Can Package K. Full output current not available. SOT and TO packages, and 0. Natlonal MAX is 1. From Wikipedia, the free encyclopedia. Natinal using this site, you agree to the Terms of Use and Privacy Policy.


The alternative is to use a switching voltage regulator which is usually more efficient but narional a larger footprint and requires a larger number of associated components. Failure to do this may cause the circuit to short.

Wikimedia Commons has media related to LM and Voltage regulator circuits. Negative Regulator with Protection Diodes. In other projects Wikimedia Commons. If the adjustment pin is connected to natiomal the output pin delivers a regulated voltage of 1.

F solid tantalum is required only if regulator is more than 4″ from. The LM is designed to compensate for these fluctuations internally, making such measures unnecessary.

Line regulation typically 0. National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves. Plastic Package Soldering, 4 sec. Europe Customer Support Center. Thermal regulation depends on IC layout.

It was designed by Robert “Bob” Pease. Life support devices or systems natlonal devices or systems.

LM 3-Terminal Adjustable Negative Regulators « Datasheet Component Blog

Output capacitors in the range of 1? F of aluminum or tantalum. Substances” as defined in CSPS2.