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Product Detailed Parameters
- Description：IC REG LINEAR -12V 100MA 8-SOIC
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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 L79L12ACD13TR is a three-terminal negative linear voltage regulator from the L79L series, manufactured by STMicroelectronics. It provides a fixed output voltage of -12 V with a maximum output current of 100 mA. The device operates within an input voltage range of -14.5 V to -35 V and features a quiescent current of 6.5 mA at 25 °C. Line regulation is specified at 250 mV (VI = -14.5 to -27 V) and load regulation at 100 mV (IO = 1 to 100 mA). It utilizes an 8-SOIC surface-mount package and supports an operating junction temperature range of 0 °C to 125 °C.
Feature Summary
- Incorporates internal thermal overload protection and short-circuit protection for robust operation.
- Designed as a fixed voltage regulator requiring no external components for basic functionality.
- Offers improved effective output impedance compared to Zener diode/resistor combinations.
Applications
- Local or on-card regulation for noise elimination.
- Replacement for Zener diode/resistor combinations in power supply circuits.
- Configuration with power pass elements to create high-current voltage regulators.
Procurement Notes
Verify that the specific ordering suffix D13TR corresponds to the SO-8 tape and reel packaging configuration. Confirm compliance requirements such as RoHS status against the manufacturer's latest documentation before finalizing procurement specifications.
Selection Notes
Select this component when a stable negative voltage rail is required for low-to-moderate current loads up to 100 mA. Ensure the input voltage remains within the specified limits relative to the ground reference to maintain proper regulation and prevent damage to the integrated circuit.
Part Context
This part belongs to the L79Lxx family of negative voltage regulators produced by STMicroelectronics. The 'AC' designation indicates a ±5% output voltage tolerance, distinguishing it from the standard 'C' variant which offers ±10% tolerance. The 'D13TR' suffix identifies the specific SO-8 surface-mount package and tape-and-reel delivery format.
Replacement Considerations
Compatible substitutes include other L79L12 variants such as L79L12ACZ-TR (TO-92) or L79L12ACUTR (SOT-89), provided the package footprint and pinout are compatible with the existing design constraints.
FAQ
What is the typical supply voltage rejection ratio for the L79L12ACD13TR?
The typical supply voltage rejection ratio is 42 dB at 120 Hz with an output current of 40 mA.
Does the L79L12ACD13TR require external capacitors to function?
No external components are strictly required for the regulator to operate, though input and output capacitors are typically recommended for stability in practical applications.
