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Product Detailed Parameters
- Description：IC REG LINEAR 18V 1.5A TO220
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：35V
- Voltage - Output (Min/Fixed)：18V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：2V @ 1A (Typ)
- Current - Output：1.5A
- Current - Quiescent (Iq)：8 mA
- Current - Supply (Max)：-
- PSRR：53dB (120Hz)
- Control Features：-
- Protection Features：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 L7818CV-DG is a three-terminal positive linear voltage regulator from the STMicroelectronics L78 series. It provides a fixed output voltage of 18 V with a maximum output current capability of 1.5 A. The device operates within an input voltage range of 26 V to 35 V and features a TO-220-3 through-hole package. It supports an operating temperature range from 0 °C to +125 °C.
Feature Summary
- Provides local on-card regulation to eliminate distribution problems associated with single-point regulation.
- Embeds internal current limiting, thermal shutdown, and safe area protection for robust operation.
Applications
- General-purpose power supply circuits requiring stable 18 V DC output
- Industrial equipment utilizing local card-level voltage regulation
- Consumer electronics designs needing reliable linear regulation
Procurement Notes
Verify the specific suffix 'DG' against the manufacturer's official documentation to confirm RoHS compliance status and lead-free manufacturing details. Ensure the procurement channel sources directly from authorized distributors or the manufacturer to guarantee component authenticity and traceability.
Selection Notes
Select this component when a fixed 18 V output is required with up to 1.5 A load capacity. Consider the TO-220-3 package for through-hole mounting and adequate heat dissipation requirements. Verify that the input voltage remains within the specified 26 V to 35 V window to ensure proper regulation and thermal performance.
Part Context
This part belongs to the L78xx series of three-terminal positive regulators. The series is widely used in applications requiring local regulation, offering various fixed output voltages and packages including TO-220, TO-220FP, D2PAK, and DPAK. These regulators are designed to be essentially indestructible due to their embedded protection features.
Replacement Considerations
Compatible substitutes include other L7818 variants such as L7818ACV or L7818ABV, provided they match the 18 V output, 1.5 A current rating, and TO-220-3 package configuration.
