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Product Detailed Parameters
- Description：IC REG LINEAR 18V 100MA 8-SOIC
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：40V
- Voltage - Output (Min/Fixed)：18V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：-
- Current - Output：100mA
- Current - Quiescent (Iq)：5.5 mA
- Current - Supply (Max)：6 mA
- PSRR：38dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature, Short Circuit
- Operating Temperature：0°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
Download product information
Overview
The L78L18CD13TR is a three-terminal positive linear voltage regulator from the STMicroelectronics L78L series, housed in an 8-SOIC surface-mount package. It provides a fixed output voltage of 18 V with a maximum continuous output current of 100 mA. The device accepts a DC input voltage ranging from 20 V to 40 V and operates within a junction temperature range of 0 °C to +125 °C. Key electrical characteristics include a typical quiescent current of 6.5 mA at 25 °C, line regulation of 320 mV, and load regulation of 170 mV.
Feature Summary
- Integrated thermal overload protection and short-circuit protection for robust operation
- Requires no external components for basic fixed-voltage regulation applications
- Available in ±8% output voltage tolerance selection
Applications
- Local or on-card voltage regulation
- Elimination of noise associated with single-point regulation
- Replacement for Zener diode/resistor combinations
Procurement Notes
Verify that the component matches the specific SO-8 package configuration and the 'C' suffix indicating ±8% voltage tolerance. Confirm the manufacturer is STMicroelectronics and check datasheet revision DS0424 Rev 30 for updated electrical limits. Ensure environmental compliance requirements align with ECOPACK specifications provided by the supplier.
Selection Notes
Select this component when a fixed 18 V supply is required with up to 100 mA load capacity in a compact surface-mount form factor. Consider the 40 V maximum input rating and ensure adequate PCB copper area for heat dissipation due to the SO-8 package thermal resistance. Verify that the operating temperature range meets the system's ambient conditions.
Part Context
This part belongs to the L78Lxx family of low-current positive regulators. Unlike the higher-power L78xx series, the L78L series is designed for applications requiring lower output currents. The CD13TR designation indicates the SO-8 package, C tolerance grade, and tape-and-reel packaging format.
Replacement Considerations
L78L18ACUTR (SOT-89 package)
FAQ
What is the output voltage tolerance for the L78L18CD13TR?
The 'C' suffix indicates a ±8% output voltage tolerance.
Does the L78L18CD13TR require external capacitors?
No external components are strictly required for basic operation, though capacitors are recommended for stability as per standard application guidelines.
