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Product Detailed Parameters
- Description：IC REG LINEAR -5V 1.5A TO220
- Series：L79
- Mfr：Lumimax Optoelectronic Technology
- Package：Bulk
- Output Configuration：Negative
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：-35V
- Voltage - Output (Min/Fixed)：-5V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：1.1V @ 1A
- Current - Output：1.5A
- Current - Quiescent (Iq)：2 mA
- Current - Supply (Max)：-
- PSRR：54dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature, Short Circuit
- Operating Temperature：-25°C ~ 125°C (TJ)
- Mounting Type：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220
- Grade：-
- Qualification：-
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Overview
The L7905 is a fixed negative linear voltage regulator manufactured by Lumimax Optoelectronic Technology. It provides a stable -5 V output with a maximum current capacity of 1.5 A. The device operates within an input voltage range of -7 V to -35 V and features a typical power supply rejection ratio of 60 dB. Designed for through-hole mounting, it utilizes the TO-220-3 package. The component supports an operating temperature range from 0°C to +150°C and includes internal thermal overload protection.
Feature Summary
- Delivers a fixed negative output voltage suitable for dual-supply applications
- Incorporates internal thermal overload protection for operational safety
- Supports high output current capability for demanding load requirements
Applications
- Negative rail generation in dual-supply electronic circuits
- Power management sections requiring stable negative bias voltages
- Industrial equipment power distribution systems
Procurement Notes
Verify that the supplier explicitly identifies Lumimax Optoelectronic Technology as the manufacturer, as this part number is widely associated with STMicroelectronics. Confirm the specific package variant matches your PCB footprint requirements. Request official datasheets to validate electrical parameters against your design specifications before finalizing procurement decisions.
Selection Notes
Select this component when a reliable negative voltage source is required for analog or digital circuitry. Ensure the input voltage remains within the specified limits to maintain regulation. Consider thermal management strategies given the through-hole package and potential power dissipation under heavy loads. Verify compatibility with existing board layouts and mounting constraints.
Part Context
This regulator belongs to the standard L79xx series of negative voltage regulators. While originally defined by STMicroelectronics, Lumimax Optoelectronic Technology offers this component as part of their broader portfolio of power management integrated circuits. The device serves as a fundamental building block for creating negative voltage rails in various commercial and industrial electronic designs.
Replacement Considerations
STMicroelectronics L7905CV and LM7905CT/NOPB are confirmed equivalent parts offering identical electrical characteristics and pinouts.
