IRU1117-33CSTR

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The IRU1117-33CSTR is a low dropout positive linear regulator manufactured by Infineon Technologies. It provides a fixed output voltage of 3.3V with a maximum output current capability of 800mA. The device operates within an input voltage range of 5V to 15V and features a typical dropout voltage of 1.2V at full load. It includes internal thermal overload protection and short-circuit current limiting for robust operation. The component is housed in a surface-mount SOT-223 package, suitable for space-constrained designs requiring stable power regulation.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Provides regulated 3.3V output for low voltage IC applications
• Capable of delivering up to 800mA output current
• Includes internal thermal shutdown and current limiting protection

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Low current 3.3V logic supply
• High speed bus termination
• VGA circuits
• Sound cards

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the manufacturer designation carefully as the part number contains 'IRU', which historically relates to International Rectifier products now integrated into Infineon. Confirm the specific suffix 'CSTR' matches the required tape and reel packaging configuration. Ensure the datasheet aligns with the 800mA specification rather than the standard 1A IFX1117 variants. Cross-reference the RoHS compliance status and lead time availability directly with authorized distributors.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a fixed 3.3V rail is required with moderate current demands up to 800mA. It is suitable for replacing older LDOs in legacy designs involving VGA or audio circuits. Consider the thermal performance in the SOT-223 package if operating near the maximum current limit. Verify that the input voltage remains within the specified 5V to 15V range to ensure proper regulation and dropout characteristics are maintained under all load conditions.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This regulator belongs to the broader family of low dropout linear regulators designed for portable and battery-powered applications. It serves as a power management solution for digital logic and analog circuits requiring clean, stable voltage rails. The device integrates essential protection features to safeguard connected loads against over-temperature and short-circuit events, ensuring reliability in consumer electronics and industrial control systems.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Check for direct pin-compatible alternatives such as the LM1117-3.3 or LT1086-3.3, verifying their current ratings and thermal dissipation capabilities match the design requirements. Ensure any substitute maintains the same output voltage tolerance and dropout voltage specifications to avoid circuit malfunction.