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Product Detailed Parameters
- Description：IC REG LINEAR -5V 100MA TO92-3
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Box (TB)
- Output Configuration：Negative
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：-30V
- Voltage - Output (Min/Fixed)：-5V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：-
- Current - Output：100mA
- Current - Quiescent (Iq)：5.5 mA
- Current - Supply (Max)：6 mA
- PSRR：49dB (120Hz)
- Control Features：-
- Protection Features：Over Temperature, Short Circuit
- Operating Temperature：0°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 L79L05ACZ-AP is a three-terminal negative linear voltage regulator from the L79L series, manufactured by STMicroelectronics. It provides a fixed output voltage of -5 V with an output current capability up to 100 mA. The device features internal current limiting and thermal shutdown protection, ensuring robust operation under fault conditions. It operates within a junction temperature range of 0 °C to 125 °C for the AC grade. The component is housed in a TO-92 package with three pins and requires no external components for basic regulation.
Feature Summary
- Integrated thermal overload and short-circuit protection mechanisms
- Fixed negative voltage regulation without external components
- High effective output impedance improvement compared to Zener diode combinations
Applications
- Local or on-card regulation
- Elimination of noise associated with single-point regulation
- Replacement for Zener diode/resistor combinations
Procurement Notes
Verify the specific ordering suffix 'AP' against the manufacturer's official documentation to confirm packaging details, as standard datasheets may list generic variants like 'Z' or 'AB'. Ensure the required operating temperature range aligns with the AC grade specifications (0 to 125 °C) rather than the AB grade (-40 to 125 °C). Confirm pin configuration compatibility with the target PCB footprint before procurement.
Selection Notes
Select this component when a fixed -5 V negative supply is required for low-current applications up to 100 mA. Consider the TO-92 package constraints for thermal dissipation if operating near maximum current limits. Verify that the input voltage remains within the absolute maximum rating of -30 V for the -5 V output variant. Evaluate the need for external capacitors based on the specific application stability requirements despite the 'no external components' claim.
Part Context
This part belongs to the L79Lxx family of three-terminal negative regulators. The 'AC' designation indicates a ±5% output voltage tolerance, while the '05' specifies the -5 V output level. The 'L79L' series is designed as a compact alternative to discrete Zener-based regulation, offering lower quiescent current and reduced noise. It complements the positive L78L series for dual-rail power supply designs.
Replacement Considerations
L79L05ACZ
FAQ
What is the maximum DC input voltage allowed for the L79L05ACZ-AP?
The maximum DC input voltage is -30 V.
Does the L79L05ACZ-AP require external capacitors to function?
No external components are required for basic operation, though they may be recommended for stability in specific high-noise environments.
What is the typical quiescent current at 25 °C?
The typical quiescent current is 6 mA at 25 °C.
