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Product Detailed Parameters
- Description：IC REG LINEAR -5V 1.5A D2PAK
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- 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)：1.4V @ 1A (Typ)
- Current - Output：1.5A
- Current - Quiescent (Iq)：3 mA
- Current - Supply (Max)：-
- PSRR：60dB (120Hz)
- Control Features：-
- Protection Features：Over Temperature, Short Circuit
- Operating Temperature：0°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Supplier Device Package：D2PAK
- Grade：-
- Qualification：-
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Overview
The L7905ACD2T is a three-terminal negative voltage regulator from the L79xxAC series, manufactured by STMicroelectronics. It provides a fixed output voltage of -5 V with an output current capability up to 1.5 A. The device is housed in a D2PAK surface-mount package and operates within a junction temperature range of 0 to 125 °C. Key electrical characteristics include a typical quiescent current of 3 mA, a dropout voltage of 1.4 V at 1 A load, and a supply voltage rejection ratio of 60 dB at 120 Hz. Maximum ratings specify a DC input voltage limit of -35 V for this output voltage variant.
Feature Summary
- Integrated thermal overload protection prevents damage during excessive heat generation.
- Built-in short circuit protection safeguards the device against output faults.
- Output transition SOA (Safe Operating Area) protection ensures stability under varying load conditions.
Applications
- Local on-card regulation for electronic circuits
- Split power supply systems requiring negative voltage rails
- Negative voltage regulation in industrial equipment
Procurement Notes
Verify that the specific part number matches the required D2PAK package configuration and the -5 V output specification. Confirm compliance with environmental standards such as ECOPACK lead-free requirements if applicable to the design. Ensure adequate heat sinking is planned, as the device can deliver over 1.5 A only with sufficient thermal management. Check for any specific ordering suffixes that might indicate different packaging or testing levels.
Selection Notes
Select this component when a fixed negative voltage rail is needed for local regulation. It serves as the negative counterpart to the L78xxA positive series, making it suitable for dual-rail power supplies. Consider the D2PAK package for surface-mount assembly needs. Evaluate thermal resistance values to determine if additional heatsinking is required for high-current applications exceeding standard dissipation limits.
Part Context
This component belongs to the L79xxAC series of three-terminal negative regulators. The series offers multiple fixed output voltages including -5, -8, -12, -15, and -24 V. These devices are designed to eliminate distribution problems associated with single-point regulation by providing local control. They are available in both TO-220 and D2PAK packages to accommodate through-hole and surface-mount designs respectively.
Replacement Considerations
L7905ACV: Equivalent -5 V regulator in TO-220 package.
FAQ
What is the maximum DC input voltage for the L7905ACD2T?
The absolute maximum DC input voltage is -35 V for the -5 V output variant.
Does the L7905ACD2T include protection features?
Yes, it includes thermal overload protection, short circuit protection, and output transition SOA protection.
