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Product Detailed Parameters
- Description：IC REG LINEAR 20V 100MA 8-SOIC
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：40V
- Voltage - Output (Min/Fixed)：20V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：-
- Current - Output：100mA
- Current - Quiescent (Iq)：6 mA
- Current - Supply (Max)：6.5 mA
- PSRR：38dB (120Hz)
- Control Features：-
- Protection Features：Over Current, 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 L78L20ACD-TR is a three-terminal positive linear voltage regulator from the STMicroelectronics L78L series, designed for fixed-voltage regulation applications. It provides a nominal output voltage of 20 V with a maximum output current capability of 100 mA. The device features internal thermal overload protection and short-circuit protection, ensuring robust operation under fault conditions. It operates within a junction temperature range of 0 to 125 °C and accepts input voltages up to 30 V for this specific output level. The 'CD' suffix indicates an SO-8 surface-mount package, while the 'A' designation specifies a tighter ±4% output voltage tolerance compared to standard variants.
Feature Summary
- Integrated thermal overload and short-circuit protection mechanisms enhance device reliability.
- Fixed output voltage configuration eliminates the need for external feedback components.
- Internal current limiting allows safe operation without additional protective circuitry.
Applications
- Local or on-card voltage regulation to eliminate noise associated with single-point distribution.
- Replacement for Zener diode and resistor combinations in low-current power supplies.
- Series connection with power pass elements to construct high-current voltage regulators.
Procurement Notes
Verify the exact part number against the manufacturer's official datasheet to confirm package type and tolerance grade. Ensure the ordering suffix matches the required thermal performance and pin configuration. Cross-reference specifications with authorized distributors to validate authenticity and production status before procurement.
Selection Notes
Select this component when a stable 20 V supply is required with moderate current demands up to 100 mA. Consider the SO-8 package for surface-mount assembly requirements. Evaluate thermal dissipation needs based on the input-output voltage differential and ambient operating conditions to ensure operation within the specified junction temperature limits.
Part Context
This component belongs to the L78L family of three-terminal positive regulators, which are widely used for general-purpose voltage regulation tasks. The series is characterized by its simplicity, requiring no external components for basic operation. It serves as a cost-effective solution for powering analog and digital circuits where precise voltage levels are critical.
Replacement Considerations
Direct replacements include other L78LxxAC variants with different fixed output voltages if the system design permits voltage adjustment. Verify pin compatibility and thermal characteristics when substituting with equivalent regulators from other manufacturers.
