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Product Detailed Parameters
- Description：IC REG LINEAR 9V 100MA 8-SOIC
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：30V
- Voltage - Output (Min/Fixed)：9V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：-
- Current - Output：100mA
- Current - Quiescent (Iq)：5.5 mA
- Current - Supply (Max)：6 mA
- PSRR：44dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature, Short Circuit
- Operating Temperature：0°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
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Overview
The L78L09ACD is a three-terminal positive linear voltage regulator from the L78L series, manufactured by STMicroelectronics. It provides a fixed 9V output with an accuracy of ±4%. The device supports up to 100 mA output current and operates within a junction temperature range of 0°C to 125°C. It accepts a maximum DC input voltage of 30V. The component utilizes internal current limiting and thermal shutdown mechanisms for protection. It is housed in an 8-pin SOIC surface-mount package.
Feature Summary
- Integrates internal current limiting and thermal shutdown for robust operation
- Provides fixed 9V output with ±4% tolerance
- Requires no external components for basic regulation
- Capable of delivering up to 100 mA output current
Applications
- Local or on-card voltage regulation
- Replacement for Zener diode and resistor combinations
- Elimination of noise associated with single-point regulation
Procurement Notes
Verify the specific suffix 'CD' against official datasheets to confirm the SO-8 package type and ±4% (A) accuracy grade. Ensure the ordering code matches the required surface-mount configuration. Confirm RoHS compliance status through manufacturer documentation before procurement.
Selection Notes
Select this component when a fixed 9V supply is required with moderate current demands up to 100 mA. The SO-8 package is suitable for surface-mount designs requiring compact footprints. Verify that the input voltage remains within the 30V absolute maximum rating and that adequate PCB copper area is available for heat dissipation.
Part Context
This part belongs to the L78Lxx series of three-terminal positive regulators. The series includes various fixed output voltages ranging from 3.3V to 24V. The 'A' designation indicates a tighter ±4% output voltage tolerance compared to the standard ±8% option. The series is designed for general-purpose linear regulation applications.
Replacement Considerations
Direct replacements include other L78L09 variants with different packages such as TO-92 or SOT-89, provided pin compatibility and thermal requirements are met. Cross-manufacturer equivalents like MC78L09ABDR2G may be considered if pinout and electrical characteristics align.
