LDI1117-2.5D

Overview

The Diotec Semiconductor LDI1117-2.5D is a fixed-output Low Dropout (LDO) linear voltage regulator housed in an 8-SOIC surface-mount package. It provides a nominal output voltage of 2.5 V with a tolerance of ±1%, supporting a maximum output current of 1 A. The device operates with a maximum input voltage of 20 V and features a typical dropout voltage of 1.25 V at full load. Key electrical specifications include a line regulation of 10 mV, load regulation of 15 mV, and a typical power supply rejection ratio (PSRR) of 75 dB. It functions within a junction temperature range of -40°C to +125°C.

Feature Summary

• Integrated thermal overload protection and current limiting for enhanced circuit safety
• Low dropout voltage capability ensures efficient operation under varying load conditions
• High power supply rejection ratio minimizes ripple and noise from the input source

Applications

• Battery-powered portable electronic devices requiring stable low-voltage rails
• Post-regulation stages in switching power supply architectures
• Embedded systems and microcontroller peripheral power management

Procurement Notes

Verify the specific suffix 'D' corresponds to the 8-SOIC package variant, as other suffixes like 'H' indicate different packages such as SOT-223. Confirm RoHS compliance status and moisture sensitivity level requirements against your assembly process standards. Ensure input voltage constraints do not exceed the 20 V maximum rating during transient conditions.

Selection Notes

Select this component when a fixed 2.5 V output is required in a surface-mount SO-8 footprint. It is suitable for applications needing moderate current capacity up to 1 A with high linearity. Consider alternative package options if higher thermal dissipation or different pin configurations are necessary for the PCB layout.

Part Context

This part belongs to the LDI1117 series of positive fixed LDO regulators manufactured by Diotec Semiconductor. The series offers various fixed output voltages and package types, including SOT-223 and SO-8 variants. The LDI1117-2.5D specifically addresses the need for compact, reliable voltage regulation in space-constrained surface-mount designs.

Replacement Considerations

Direct substitutes may include Diotec LDI1117-2.5H (SOT-223 package) or LDI1117-05D (SO-8 package, 5V output). Cross-brand replacements require matching the 1 A output current, 2.5 V output voltage, SO-8 package, and similar dropout characteristics.