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Product Detailed Parameters
- Description：IC REG LINEAR -9V 100MA SOT89-3
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR)
- Output Configuration：Negative
- 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 Temperature, Short Circuit
- Operating Temperature：0°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：TO-243AA
- Supplier Device Package：SOT-89-3
- Grade：-
- Qualification：-
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Overview
The L79L09ACUTR is a three-terminal negative voltage regulator from the L79L00 series, manufactured by STMicroelectronics. It provides a fixed output voltage of -9 V with an AC selection tolerance of ±5%. The device delivers an output current up to 100 mA and operates within a junction temperature range of 0 to 125 °C. It features internal thermal overload protection and short-circuit protection. The component is housed in an SO-8 package.
Feature Summary
- Provides local on-card regulation to eliminate noise and distribution problems associated with single-point regulation.
- Functions as a replacement for Zener diode/resistor combinations, offering improved output impedance and lower quiescent current.
- Includes internal current limiting and thermal shutdown mechanisms for robust operation.
Applications
- Local or on-card voltage regulation
- Split power supply systems
- Replacement for Zener diode/resistor networks
Procurement Notes
Verify that the part number suffix 'UTR' corresponds to the specified SO-8 tape and reel packaging configuration as documented in the official ordering codes. Confirm the 'AC' designation indicates the required ±5% output voltage tolerance. Ensure the supplier source matches the manufacturer's authorized distribution channels to guarantee component authenticity and datasheet compliance.
Selection Notes
Select this component when a fixed -9 V negative rail is required with low current demands up to 100 mA. The SO-8 package offers a compact footprint suitable for space-constrained designs. The AC tolerance variant is appropriate for applications requiring tighter voltage accuracy compared to the standard C version. Consider thermal dissipation requirements based on the input-output voltage differential and ambient conditions.
Part Context
This device belongs to the L79L00 series of three-terminal negative regulators. The series includes various fixed output voltages such as -5, -6, -8, -12, and -15 V. These regulators are designed for general-purpose applications where reliable, low-cost negative voltage generation is needed without external feedback components.
Replacement Considerations
Compatible substitutes include other L79L09 variants such as L79L09CD (C tolerance) or L79L09AB (extended temperature). Cross-brand equivalents may require verification of pinout compatibility and thermal resistance characteristics.
