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Product Detailed Parameters
- Description：IC REG LINEAR -8V 1.5A D2PAK
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR)
- Output Configuration：Negative
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：-35V
- Voltage - Output (Min/Fixed)：-8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：1.1V @ 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 L7908ACD2T-TR is a three-terminal negative voltage regulator from the L79xxAC series, manufactured by STMicroelectronics. It provides a fixed output voltage of -8 V with an output current capability up to 1.5 A. The device operates within a junction temperature range of 0 to 125 °C and accepts DC input voltages down to -35 V for this specific output level. It features thermal overload protection, short circuit protection, and output transition SOA protection. The component is housed in a surface-mount D2PAK package.
Feature Summary
- Provides local on-card regulation to eliminate distribution problems associated with single point regulation.
- Includes internal thermal overload protection and short circuit protection mechanisms.
- Capable of delivering over 1.5 A output current when adequate heat sinking is provided.
- Compatible with external components to obtain adjustable voltages and currents.
Applications
- Split power supplies requiring negative voltage rails.
- Local on-card voltage regulation.
- Adjustable voltage and current circuits using external components.
Procurement Notes
Verify the exact part number against the manufacturer's official datasheet to ensure compatibility with the required voltage and package specifications. Confirm that the ordering suffix matches the desired packaging format. Check for any specific environmental compliance certifications required for your application. Ensure proper handling procedures are followed during assembly due to the surface-mount nature of the component.
Selection Notes
Select this component when a fixed -8 V negative supply is needed with high current capability. Consider the D2PAK package for its thermal performance and surface-mount convenience. Evaluate the need for external heat sinking to achieve maximum current output. Compare line and load regulation requirements against the datasheet specifications to ensure suitability for the intended application.
Part Context
The L7908ACD2T-TR belongs to the L79xxAC series of three-terminal negative regulators. This series offers various fixed output voltages including -5, -8, -12, -15, and -24 V. The devices are designed to complement the L78xxA positive standard series, making them suitable for dual polarity power supply designs. They are available in both through-hole and surface-mount packages.
Replacement Considerations
L7908CT
FAQ
What is the maximum output current for the L7908ACD2T-TR?
The device can provide an output current up to 1.5 A, provided adequate heat sinking is implemented.
Does the L7908ACD2T-TR include protection features?
Yes, it includes thermal overload protection, short circuit protection, and output transition SOA protection.
