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Product Detailed Parameters
- Description：IC REG LINEAR 5V 500MA DPAK
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：35V
- Voltage - Output (Min/Fixed)：5V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：-
- Current - Output：500mA
- Current - Quiescent (Iq)：6 mA
- Current - Supply (Max)：-
- PSRR：62dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature, Short Circuit
- Operating Temperature：0°C ~ 150°C
- Mounting Type：Surface Mount
- Package / Case：TO-252-3, DPAK (2 Leads + Tab), SC-63
- Supplier Device Package：DPAK
- Grade：-
- Qualification：-
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Overview
The L78M05CDT is a three-terminal positive linear voltage regulator from the L78Mxx series, manufactured by STMicroelectronics. It provides a fixed 5V output with a maximum current capability of 500mA. The device operates within an input voltage range of 7V to 35V and features a typical static current of 6mA. It utilizes a DPAK (TO-252) surface-mount package with dimensions of approximately 6.6mm x 6.2mm x 2.4mm. The component supports an extended operating temperature range from 0°C to +150°C and includes internal protections such as thermal overload shutdown, short-circuit protection, and safe area operation limits.
Feature Summary
- Provides local on-card regulation to eliminate distribution problems associated with single-point regulation systems.
- Integrates internal current limiting, thermal shut-down, and safe area protection for robust operation under fault conditions.
- Offers a fixed 5V output voltage with high tolerance stability suitable for sensitive electronic circuits.
Applications
- Power supply units for consumer electronics requiring stable 5V logic levels.
- On-board voltage regulation in industrial control systems and PLCs.
- Power management for automotive electronic subsystems and navigation devices.
Procurement Notes
Verify the specific suffix 'CDT' confirms the DPAK surface-mount package and industrial temperature grade. Ensure the ordering part number matches the exact manufacturer designation to avoid confusion with through-hole variants or different output current ratings within the same family. Confirm RoHS compliance status if required for your manufacturing process.
Selection Notes
Select this component when a compact surface-mount solution is required for 500mA applications. It serves as a direct replacement for larger through-hole regulators where board space is limited. Consider the thermal dissipation requirements of the DPAK package relative to the expected load current and ambient temperature conditions.
Part Context
This device belongs to the L78Mxx series of three-terminal positive regulators, which are designed for general-purpose linear regulation. The series is available in multiple packages including TO-220, TO-220FP, and DPAK, offering flexibility for various mounting styles. The L78M05CDT specifically addresses the need for smaller form factors while maintaining the reliability and protection features characteristic of the broader L78 family.
Replacement Considerations
Compatible substitutes include other manufacturers' 500mA fixed 5V regulators in DPAK packages, such as the MC78M05BDTRKG. Verify pinout compatibility and thermal performance characteristics before substitution.
