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Product Detailed Parameters
- Description：IC REG LINEAR 8V 100MA TO92-3
- 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：Through Hole
- Package / Case：TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Supplier Device Package：TO-92-3
- Grade：-
- Qualification：-
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Overview
The L78L08ABZTR 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 an output current capability up to 100 mA. The device features internal current limiting and thermal shutdown protection. It operates within a junction temperature range of -40 °C to +125 °C. Maximum DC input voltage is 30 V for this output voltage variant. Quiescent current is typically 6 mA at 25 °C. Line regulation is specified at 175 mV maximum (VI = 10.5 to 23 V), and load regulation is 80 mV maximum (IO = 1 to 100 mA). Supply voltage rejection ratio is typically 45 dB at 120 Hz.
Feature Summary
- Internal current limiting and thermal shutdown protection ensure robust operation under fault conditions.
- Fixed 8 V output eliminates the need for external components for basic regulation.
- Suitable for local or on-card regulation to eliminate noise associated with single-point distribution.
Applications
- Local or on-card voltage regulation
- Replacement for Zener diode/resistor combinations
- Power pass element integration for high-current regulators
Procurement Notes
Verify the specific suffix 'ZTR' corresponds to the tape and reel packaging format for the TO-92 package as documented in the manufacturer's datasheet. Confirm that the 'AB' designation aligns with the required -40 °C to +125 °C operating temperature range and ±4% output voltage tolerance. Ensure compatibility with the intended PCB footprint for the TO-92-3 leaded package.
Selection Notes
Select this component when a fixed 8 V output is required with up to 100 mA load current. The 'AB' grade offers tighter voltage tolerance compared to the 'AC' grade. Consider the TO-92 package for through-hole mounting applications requiring moderate power dissipation capabilities within the specified thermal resistance limits.
Part Context
This part belongs to the L78L series of three-terminal positive regulators. The series includes various fixed output voltages ranging from 3.3 V to 24 V. The L78L08 variant specifically targets 8 V regulation needs. The series is designed for general-purpose linear regulation applications where simplicity and reliability are prioritized over low dropout performance.
FAQ
What is the maximum DC input voltage for the L78L08AB?
The maximum DC input voltage is 30 V for output voltages between 3.3 V and 9 V.
Does the L78L08AB require external capacitors for stability?
No external components are strictly required for basic operation, though typical application circuits often include input and output capacitors for improved transient response and stability.
What is the quiescent current specification?
The quiescent current is typically 6 mA at 25 °C and 5.5 mA at 125 °C.
