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Product Detailed Parameters
- Description：IC REG LINEAR -12V 100MA 8-SOIC
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR)
- 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：-40°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 L79L12ABD-R 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 of 100 mA. The device operates within an input voltage range of -14.5 V to -27 V and supports a junction temperature range of -40 °C to +125 °C. Key electrical characteristics include a dropout voltage of 1.7 V, line regulation of 250 mV (max), load regulation of 100 mV (max), and supply voltage rejection of 36 dB (min). It features internal thermal overload and short-circuit protection.
Feature Summary
- Integrated thermal overload and short-circuit protection for robust operation
- Fixed -12 V output eliminates external component requirements
- Low quiescent current consumption
- Improved output impedance compared to Zener diode/resistor combinations
Applications
- Local or on-card regulation for noise elimination
- Replacement for Zener diode/resistor combinations
- Power pass element integration for high-current regulators
Procurement Notes
Verify the specific suffix 'R' against official STMicroelectronics documentation to confirm tape and reel packaging status, as standard ordering codes list '13TR' for this configuration. Ensure the selected package variant matches the required PCB footprint and thermal dissipation needs. Confirm RoHS compliance and availability through authorized distributors.
Selection Notes
Select the L79L12ABD-R when a stable -12 V negative rail is required at currents up to 100 mA. The 'AB' designation indicates extended industrial temperature capability (-40 °C to +125 °C) and tighter voltage tolerance compared to 'AC' or 'C' variants. Consider the SO-8 package for surface mount applications requiring efficient heat sinking via exposed pins.
Part Context
This component belongs to the L79L00 series of three-terminal negative linear regulators. The series offers fixed output voltages including -5 V, -6 V, -8 V, -9 V, -12 V, and -15 V. These devices are designed for simple, low-cost power management solutions in consumer and industrial electronics where moderate current levels are sufficient.
Replacement Considerations
Compatible substitutes within the same family include L79L12ACD and L79L12CD. Note that 'AC' and 'C' variants have a restricted operating temperature range of 0 °C to +125 °C, unlike the -40 °C to +125 °C range of the 'AB' version.
