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Product Detailed Parameters
- Description：IC REG LINEAR 24V 500MA TO220
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：40V
- Voltage - Output (Min/Fixed)：24V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：-
- Current - Output：500mA
- Current - Quiescent (Iq)：6 mA
- Current - Supply (Max)：-
- PSRR：50dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature, Short Circuit
- Operating Temperature：0°C ~ 125°C
- Mounting Type：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220
- Grade：-
- Qualification：-
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Overview
The L78M24CV-DG is a three-terminal positive linear voltage regulator from the STMicroelectronics L78M series. It provides a fixed output voltage of 24 V with a maximum output current of 500 mA. The device operates within an input voltage range of 26 V to 40 V and supports junction temperatures up to +150 °C. Key electrical specifications include a typical line regulation of 100 mV, load regulation of 480 mV, and a power supply rejection ratio (PSRR) of 50 dB at 120 Hz. The component utilizes a TO-252 surface-mount package.
Feature Summary
- Integrates internal thermal overload protection and short-circuit protection for robust operation under fault conditions.
- Includes output transition safe area (SOA) protection to prevent damage during dynamic load changes.
- Provides local on-card voltage regulation to eliminate distribution issues associated with single-point systems.
Applications
- General-purpose electronic equipment requiring stable 24 V DC power rails
- Industrial control systems utilizing surface-mount assembly processes
- Embedded subsystems needing localized voltage regulation
Procurement Notes
Verify that the specific suffix 'DG' corresponds to the standard L78M24CDT-TR or similar TO-252 variants in official ST documentation. Confirm RoHS compliance status and ensure the ordering code matches the required tape-and-reel packaging quantity. Cross-reference the manufacturer part number against the latest datasheet revision to validate pinout and thermal characteristics before procurement.
Selection Notes
Select this component when a fixed 24 V output is required with a continuous current capacity of 500 mA in a surface-mount form factor. Ensure the available PCB space accommodates the TO-252 package dimensions. Verify that the input voltage source remains within the specified 26 V to 40 V window to maintain proper dropout voltage margins and regulatory performance.
Part Context
This device belongs to the L78M family of three-terminal positive regulators, which are designed as drop-in replacements for older industry-standard types. The L78M series offers reduced current capability compared to the standard L78 series but maintains compatibility in terms of functionality and protection features. It is widely used in applications where moderate current levels and compact surface-mount packaging are prioritized over high-power delivery.
Replacement Considerations
Direct functional equivalents include the L78M24CDT-TR and L78M24CP. Verify pinout compatibility and thermal resistance values when substituting between different package styles such as TO-220 or DPAK.
