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Product Detailed Parameters
- Description：IC REG LINEAR -12V 100MA TO92-3
- Series：-
- Mfr：STMicroelectronics
- Package：Bulk
- 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：Through Hole
- Package / Case：TO-226-3, TO-92-3 (TO-226AA)
- Supplier Device Package：TO-92-3
- Grade：-
- Qualification：-
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Overview
The L79L12ACZ is a three-terminal negative voltage regulator from the L79L00 series, manufactured by STMicroelectronics. It provides a fixed output voltage of -12 V with a maximum output current capability of 100 mA. The device operates within an input voltage range of -14.5 V to -27 V and features a typical dropout voltage of 1.7 V. Electrical characteristics include a line regulation of 250 mV (max) and load regulation of 100 mV (max). The quiescent current is typically 6.5 mA at 25°C. The component offers ±5% output voltage tolerance and is available in TO-92 packaging.
Feature Summary
- Integrated thermal overload protection and short-circuit protection for robust operation
- Eliminates noise and distribution issues associated with single-point regulation through local on-card regulation
- Provides effective output impedance improvement compared to Zener diode/resistor combinations
Applications
- Local or on-card voltage regulation
- Replacement for Zener diode/resistor combinations
- Construction of high-current voltage regulators using external power pass elements
Procurement Notes
Verify the specific package type and suffix against the ordering codes table to ensure compatibility with the intended PCB footprint. Confirm that the AC selection variant meets the required output voltage tolerance specifications for the application. Check datasheet revisions to ensure alignment with current manufacturing standards.
Selection Notes
Select this component when a fixed negative voltage rail is required for low-current applications up to 100 mA. The AC version provides tighter voltage tolerance compared to the standard C version. Ensure adequate heat sinking is considered if operating near maximum current limits, although internal thermal protection prevents damage.
Part Context
This part belongs to the L79L00 series of negative voltage regulators, which includes various fixed output voltages such as -5 V, -6 V, -8 V, -9 V, and -15 V. The series is designed to complement positive regulator families, facilitating split power supply designs. The 'AC' designation indicates a specific output voltage tolerance grade within the product line.
Replacement Considerations
Direct functional substitutes within the same series include L79L12C and L79L12AB, differing primarily in voltage tolerance and temperature range. Cross-series replacements like the L7912 series offer higher current capabilities but require different thermal management.
