LD1117V25C

Overview

The LD1117V25C is a fixed positive low-dropout voltage regulator manufactured by STMicroelectronics. It provides a fixed output voltage of 2.5 V with an output current capability of up to 800 mA. The device operates within a temperature range of 0 °C to 125 °C and features internal current and thermal limiting for protection. It utilizes an NPN pass transistor to ensure high efficiency, where quiescent current flows primarily into the load. Stability requires only a minimum 10 μF capacitor. The component is available in surface mount packages such as SOT-223 and DPAK, which optimize thermal characteristics and space utilization.

Feature Summary

• Fixed 2.5 V output voltage with 800 mA current capacity
• Low dropout voltage performance utilizing NPN pass transistor
• Internal current and thermal limit protection mechanisms
• Stability achieved with standard 10 μF output capacitor

Applications

• Battery-powered systems requiring efficient voltage regulation
• Post-regulation stages for switching power supplies
• Embedded logic supply rails
• General-purpose linear regulation in compact designs

Procurement Notes

Verify the specific suffix 'V25C' against official STMicroelectronics documentation to confirm the exact output voltage tolerance and package variant. Ensure compatibility with required thermal management solutions given the SOT-223 or DPAK package options. Confirm RoHS compliance status and packaging type (Tape and Reel) prior to ordering. Cross-reference part numbers with authorized distributors to avoid counterfeit components.

Selection Notes

Select this component when a stable 2.5 V rail is needed with moderate current demands up to 800 mA. Consider the low dropout characteristic for applications with limited input-output voltage differentials. Evaluate thermal dissipation requirements based on the chosen package and ambient operating conditions. Verify that the input voltage remains within the specified maximum limits while maintaining regulation.

Part Context

The LD1117 series comprises adjustable and fixed positive voltage regulators designed for low dropout operation. The LD1117V25C belongs to the fixed output subset, specifically providing 2.5 V. This family is characterized by high efficiency due to its NPN pass transistor design, distinguishing it from PNP-based alternatives. The series supports various packages including SOT-223, DPAK, SO-8, and TO-220 to suit different thermal and spatial constraints.

FAQ

What is the minimum capacitance required for stability?

A minimum of 10 μF is required for stability.

Does the LD1117V25C include protection features?

Yes, it includes internal current limiting and thermal limiting.