LF18CPT

Overview

The LF18CPT is a positive low-dropout (LDO) voltage regulator manufactured by STMicroelectronics, belonging to the LF18 series. It provides a fixed output voltage of 1.8 V with a maximum output current capability of 1 A. The device utilizes a TO-252-5 surface-mount package and operates within an ambient temperature range of -40 °C to +125 °C. Key electrical specifications include a maximum dropout voltage of 700 mV, a static current of 1 mA, and a line regulation of 12 mV. The unit features a single output channel with a voltage regulation accuracy of 2%.

Feature Summary

• Provides stable fixed 1.8 V output for sensitive digital logic circuits
• Operates at full load with minimal voltage drop under varying input conditions
• Maintains performance across extended industrial temperature ranges

Applications

• Powering microcontrollers requiring 1.8 V supply rails
• Biasing RF modules in communication devices
• Supplying analog-to-digital converters in data acquisition systems

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm lot codes and date codes against current production status. Ensure packaging integrity matches specified tube quantities. Check RoHS compliance documentation for environmental adherence. Validate datasheet revisions match the specific batch delivered.

Selection Notes

Select this regulator when a fixed 1.8 V rail is required with up to 1 A load capacity. Consider the TO-252-5 package for thermal management needs. Evaluate input voltage headroom against the 700 mV dropout specification. Assess system power budget against the 1 mA quiescent current consumption. Verify compatibility with adjacent circuitry operating at the same voltage level.

Part Context

This component belongs to the LF18 family of low-dropout regulators designed for general-purpose power management applications. The series offers various fixed output voltages to support diverse electronic systems. STMicroelectronics positions these devices as cost-effective solutions for portable and battery-operated equipment requiring efficient voltage conversion.

Replacement Considerations

Check for LF18CPT-TR variant which shares identical electrical characteristics but differs in reel-based packaging configuration.