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Product Detailed Parameters
- Description：IC REG LINEAR -12V 100MA SOT89-3
- 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：TO-243AA
- Supplier Device Package：SOT-89-3
- Grade：-
- Qualification：-
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Overview
The L79L12ACUTR 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 internal thermal overload and short-circuit protection. It is housed in a surface-mount SOT-89 package and supports an operating junction temperature range of 0 °C to 125 °C.
Feature Summary
- Integrates internal current limiting and thermal shutdown mechanisms for robust operation under fault conditions.
- Delivers stable fixed negative voltage regulation without requiring external components.
- Offers improved output impedance and lower noise compared to Zener diode/resistor combinations.
Applications
- Local or on-card negative voltage regulation
- Elimination of noise associated with single-point regulation systems
- Power pass element integration for high-current regulator designs
Procurement Notes
Verify that the specific part number matches the required SOT-89 surface mount package configuration. Confirm the AC suffix indicates ±5% output voltage tolerance. Ensure the component meets the specified 0 °C to 125 °C operating temperature range for the intended application environment.
Selection Notes
Select this component when a compact negative voltage solution is required for low-power circuits. The SOT-89 package facilitates surface mount assembly. Consider the 100 mA current limit and thermal resistance characteristics when designing heat dissipation strategies for the printed circuit board.
Part Context
This device belongs to the L79L series of three-terminal negative regulators. The series includes variants for -5 V, -8 V, -12 V, and -15 V outputs. The L79L12ACUTR specifically denotes the -12 V version with AC tolerance packaged in tape and reel format for automated surface mount processing.
Replacement Considerations
Compatible substitutes include other L79LxxAC variants such as L79L05ACUTR or L79L15ACUTR for different voltage requirements. Cross-reference with generic L79xx series regulators if through-hole packaging is acceptable, noting differences in current handling capabilities.
