LD1117V33C

Overview

The LD1117V33C is a fixed-output positive low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a stable 3.3 V output with a maximum continuous current of 800 mA to 950 mA, depending on specific testing conditions. The device supports an input voltage range up to 15 V and operates within a junction temperature range of 0°C to 125°C or 150°C. It features a dropout voltage of approximately 1.0 V to 1.2 V at full load. Integrated protection mechanisms include thermal overload shutdown and current limiting. The component is housed in a TO-220-3 through-hole package.

Feature Summary

• Fixed 3.3 V output configuration for direct power supply applications
• Integrated thermal overload and short-circuit current limiting protection
• Low dropout voltage capability for efficient power management
• Through-hole TO-220 package design for robust mounting

Applications

• General-purpose linear voltage regulation in electronic circuits
• Power supplies requiring stable 3.3 V rails
• Battery-powered systems utilizing low-dropout characteristics

Procurement Notes

Verify the exact suffix designation against the manufacturer's official datasheet to confirm pinout compatibility and thermal specifications. Ensure the selected package variant matches the required PCB footprint and thermal dissipation needs. Cross-reference RoHS compliance status with current regulatory requirements before finalizing procurement decisions.

Selection Notes

Select this component when a fixed 3.3 V output is required with moderate current demands up to 800 mA. Consider the TO-220 package for applications where through-hole mounting and higher thermal mass are beneficial. Evaluate the input-to-output voltage differential to ensure operation remains within the specified dropout voltage limits under all expected load conditions.

Part Context

This part belongs to the LD1117 series of low-dropout regulators from STMicroelectronics. The series includes various output voltages and package options, such as SOT-223 and SOIC-8 variants. The LD1117V33C specifically denotes the fixed 3.3 V version in the TO-220 package, distinguishing it from adjustable models like the LD1117V.

Replacement Considerations

LD1117V33 is a compatible alternative within the same product family offering identical electrical performance in a standard TO-220 package.