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Product Detailed Parameters
- Description：IC REG LINEAR 5.05V 200MA TO3
- Series：-
- Mfr：Texas Instruments
- Package：Bulk
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：25V
- Voltage - Output (Min/Fixed)：5.05V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：-
- Current - Output：200mA
- Current - Quiescent (Iq)：5.2 mA
- Current - Supply (Max)：10 mA
- PSRR：-
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-55°C ~ 150°C
- Mounting Type：Through Hole
- Package / Case：TO-205AD, TO-39-3 Metal Can
- Supplier Device Package：TO-3
- Grade：-
- Qualification：-
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Overview
The LM109H is a fixed 5-volt linear voltage regulator manufactured by Texas Instruments, designed for local regulation on digital logic cards. It delivers an output current exceeding 1 ampere and operates within a junction temperature range of -55°C to +150°C. The device features internal thermal overload protection and current limiting, ensuring robust performance without requiring external bypass components under standard conditions. It utilizes a TO-39-3 through-hole package and maintains a typical power supply rejection ratio of 50 dB.
Feature Summary
- Integrated thermal shutdown and current limiting for enhanced reliability
- Eliminates distribution problems associated with single-point regulation
- Designed for direct use on digital logic cards without external bypassing
Applications
- Local regulation on digital logic cards
- Precision regulators using the circuit as a control element
- Systems requiring blowout-proof voltage regulation
Procurement Notes
Verify the specific suffix against official datasheets to confirm package type and electrical specifications. Ensure input bypassing is implemented if the regulator is located far from the power supply filter capacitor. Confirm that adequate heat sinking is provided when operating at high load currents to maintain thermal stability within the specified junction temperature limits.
Selection Notes
Select this component when a fixed 5-volt output with high current capability is required for digital logic applications. Consider the TO-39-3 package constraints for through-hole mounting. Evaluate thermal management requirements carefully, as the available output current depends significantly on the provided heat sinking capabilities in the final assembly design.
Part Context
The LM109 series consists of complete 5V regulators fabricated on a single silicon chip. These devices are engineered to minimize external component counts while providing stable regulation for TTL and DTL logic families. The series offers flexibility for setting voltages above 5V or serving as control elements in precision regulator designs.
Replacement Considerations
Consult official substitution guides for verified equivalents. Generic replacements may not match the specific thermal protection characteristics or current handling capabilities documented for this part number.
