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Product Detailed Parameters
- Description：IC REG LINEAR -15V 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)：-15V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：-
- Current - Output：100mA
- Current - Quiescent (Iq)：6 mA
- Current - Supply (Max)：6.5 mA
- PSRR：39dB (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 L79L15ACZ is a three-terminal negative voltage regulator from the L79L series by STMicroelectronics, housed in a TO-92 package. It provides a fixed output voltage of -15 V with an output current capability up to 100 mA. The device operates within a junction temperature range of 0 to 125 °C and features internal thermal overload and short-circuit protection. Electrical characteristics include a dropout voltage of 1.7 V, line regulation of 250 mV (VI = -20 to -30 V), and load regulation of 75 mV (IO = 1 to 40 mA).
Feature Summary
- Integrated thermal overload protection and short-circuit protection for robust operation.
- Designed as a direct replacement for Zener diode/resistor combinations, offering improved output impedance and lower noise.
- Requires no external components for basic fixed voltage regulation applications.
Applications
- Local or on-card regulation to eliminate noise associated with single-point regulation.
- Replacement for Zener diode/resistor networks requiring stable negative voltage rails.
- Power supply circuits utilizing power pass elements for high-current requirements.
Procurement Notes
Verify that the specific part number matches the required tolerance grade; the 'AC' suffix indicates a ±5% output voltage selection. Confirm the package type corresponds to the design footprint, as the L79L series is available in multiple configurations including SO-8 and SOT-89. Ensure the ordering code aligns with the desired packaging format, such as tube or tape and reel options provided by the manufacturer.
Selection Notes
Select this component when a fixed -15 V negative rail is required with moderate current demands up to 100 mA. The AC variant offers tighter voltage tolerance compared to the standard C version. Consider the thermal resistance characteristics of the TO-92 package and ensure adequate heat sinking if operating near maximum current limits to maintain performance within the specified temperature range.
Part Context
This component belongs to the L79L00 series of three-terminal negative regulators. The series includes various fixed output voltages such as -5, -6, -8, -9, -12, and -15 V. These regulators are designed for applications requiring local regulation and are compatible with positive regulator series like L78 for split power supply designs.
Replacement Considerations
L79L15CZ
FAQ
What is the output voltage tolerance for the L79L15ACZ?
The L79L15ACZ has an output voltage tolerance of ±5% at 25°C.
Does the L79L15ACZ require external capacitors for stability?
No external components are required for basic operation, though input and output capacitors are recommended in test circuits for optimal performance.
