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Product Detailed Parameters
- Description：IC REG LINEAR -12V 100MA 8-SOIC
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Output Configuration：Negative
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：-35V
- Voltage - Output (Min/Fixed)：-12V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：-
- Current - Output：100mA
- Current - Quiescent (Iq)：6 mA
- Current - Supply (Max)：6.5 mA
- PSRR：42dB (120Hz)
- Control Features：-
- Protection Features：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 L79L12ACD is a three-terminal negative linear voltage regulator from the STMicroelectronics L79L00 series, housed in an SO-8 package. It provides a fixed output voltage of -12 V with a maximum output current capability of 100 mA. The device operates within a junction temperature range of 0 to 125 °C and features internal thermal overload protection and short-circuit protection. It requires no external components for basic operation.
Feature Summary
- Integrates internal current limiting and thermal shutdown mechanisms to ensure operational robustness.
- Functions as a direct replacement for Zener diode and resistor combinations, offering superior output impedance and lower noise characteristics.
- Designed for local or on-card regulation applications to eliminate distribution problems associated with single-point regulation.
Applications
- Local or on-card voltage regulation
- Elimination of noise and distribution issues in power systems
- Replacement for Zener diode/resistor networks
Procurement Notes
Verify that the specific part number matches the required tolerance and package configuration. Confirm the suffix indicates the SO-8 tube packaging variant rather than tape and reel options. Ensure compatibility with the intended operating temperature range and input voltage requirements before finalizing procurement.
Selection Notes
Select this component when a fixed negative voltage rail is required for low-current applications up to 100 mA. Consider the SO-8 package for surface-mount assembly needs. Evaluate the dropout voltage and line regulation specifications against the specific input voltage variations expected in the target circuit design.
Part Context
This component belongs to the L79L00 series of negative voltage regulators manufactured by STMicroelectronics. The series includes various fixed output voltages such as -5 V, -6 V, -8 V, -9 V, -12 V, and -15 V. The 'AC' designation specifically denotes a ±5% output voltage tolerance, distinguishing it from standard or wider tolerance variants within the same family.
Replacement Considerations
Compatible alternatives include other manufacturers' LM79L12 devices or MC79L12 variants. Verify pinout compatibility and thermal resistance characteristics when substituting to ensure equivalent performance under load.
FAQ
What is the output voltage tolerance for the L79L12ACD?
The 'AC' suffix indicates a fixed output voltage tolerance of ±5% at 25°C.
Does the L79L12ACD require external capacitors for stability?
No external components are strictly required for basic operation, though test circuits typically specify input and output capacitors for optimal performance.
What protection features are integrated into the L79L12ACD?
The device includes internal current limiting and thermal overload protection to prevent damage under fault conditions.
