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The LM109K/883QS from Texas Instruments is a complete 5V regulator fabricated on a single silicon chip. It is designed for local regulation on digital logic cards, simplifying power distribution. This device is available in standard transistor packages, including the TO-3 power package, which can deliver output currents greater than 1A.
The regulator features internal thermal overload protection and current limiting to prevent overheating and ensure safe operation. It is specified to be compatible with TTL and DTL logic. The operating temperature range is -55 to 150°C, making it suitable for extended temperature applications.
Key electrical characteristics include a maximum input voltage of 35V and a minimum input voltage of 7.1V. The typical dropout voltage is 3000mV, and the typical quiescent current is 5.2mA. The PSRR at 100 KHz is 64dB, and the noise is 40µVrms.
This series of regulators is designed to be easy to use, minimizing the need for external components. The LM109K/883QS is suitable for various digital logic applications where stable 5V power is required.
| Qty | Low | High |
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| 1+ | $2.23 | $2.23 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The LM109K/883QS provides a fixed 5V output voltage.
The LM109K/883QS can deliver output currents greater than 1A in the TO-3 power package.
The operating temperature range for the LM109K/883QS is -55 to 150°C.
Yes, the LM109K/883QS includes internal thermal overload protection and current limiting.