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Product Detailed Parameters
- Description：IC REG LINEAR 8V 100MA SOT89-3
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：30V
- Voltage - Output (Min/Fixed)：8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：-
- Current - Output：100mA
- Current - Quiescent (Iq)：5.5 mA
- Current - Supply (Max)：6 mA
- PSRR：45dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature, Short Circuit
- Operating Temperature：-40°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 L78L08ABUTR is a three-terminal positive linear voltage regulator from the STMicroelectronics L78L series, housed in a TO-92 package. It provides a fixed output voltage of 8 V with a maximum output current of 100 mA. The device features internal thermal overload protection and short-circuit protection. It operates within an extended temperature range of -40 °C to +125 °C. The quiescent current is typically 6 mA at 25 °C. Line regulation is specified at 175 mV (VI = 10.5 to 23 V) and load regulation at 80 mV (IO = 1 to 100 mA). Supply voltage rejection is typically 45 dB at 120 Hz.
Feature Summary
- Integrated thermal overload and short-circuit protection for robust operation
- Fixed 8 V output with ±4% tolerance accuracy
- Requires no external components for basic regulation
- Capable of local on-card voltage regulation
Applications
- Local or on-card regulation to eliminate noise associated with single-point regulation
- Replacement for Zener diode and resistor combinations
- Building high-current regulators when used with power pass elements
Procurement Notes
Verify the specific suffix UT indicates tape and reel packaging for the TO-92 variant. Confirm the AB designation corresponds to the -40 °C to +125 °C operating range. Ensure compatibility with the required input voltage headroom relative to the 8 V output. Check for RoHS compliance status as per the manufacturer's environmental specifications.
Selection Notes
Select this component for applications requiring a simple, fixed 8 V supply with moderate current demands up to 100 mA. Consider the thermal resistance characteristics of the TO-92 package for heat dissipation requirements. Evaluate the line and load regulation specifications against the circuit's stability needs. Compare against other L78L variants if different output voltages or packages are preferred.
Part Context
This part belongs to the L78Lxx series of three-terminal positive regulators. The series includes various output voltages and packages such as SO-8 and SOT-89. The L78L08ABUTR specifically denotes the 8 V output version in the TO-92 package with the 'A' grade for tighter tolerance and 'B' for extended temperature range.
Replacement Considerations
Other L78L08 variants exist in different packages like SO-8 or SOT-89. Cross-package replacements require verifying pinout compatibility and thermal performance. Alternative manufacturers may offer similar regulators but must be checked for electrical parameter equivalence.
