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Product Detailed Parameters
- Description：IC REG LINEAR 2.5V 800MA 8-SOIC
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：2.5V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：1.2V @ 800mA
- Current - Output：800mA
- Current - Quiescent (Iq)：10 mA
- Current - Supply (Max)：-
- PSRR：75dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：0°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
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Overview
The LD1117D25 is a fixed-output low-dropout positive voltage regulator manufactured by STMicroelectronics. It provides a stable 2.5 V output with a maximum current capability of 800 mA. The device operates within an input voltage range of 3.3 V to 15 V and features a typical dropout voltage of 1 V at full load. Designed for surface-mount applications, it utilizes the SOIC-8 package. Key electrical specifications include a line regulation of 6 mV, load regulation of 10 mV, and a quiescent current of approximately 5 mA. The unit supports operation across a temperature range from 0 °C to +125 °C.
Feature Summary
- Fixed 2.5 V output voltage with high accuracy
- Low dropout performance for efficient power conversion
- Integrated thermal and current limiting protection
Applications
- Portable battery-powered equipment
- Post-regulation for switching supplies
- Embedded system power distribution
Procurement Notes
Verify the specific suffix code against official documentation to confirm package type and tape-and-reel specifications. Confirm RoHS compliance status as manufacturing revisions may alter environmental declarations. Ensure the ordering part number matches the required SOIC-8 variant to avoid pinout or thermal mismatch issues during integration.
Selection Notes
Select this component when a precise 2.5 V rail is required for logic circuits or sensors. The SOIC-8 package offers thermal advantages over through-hole options while maintaining space efficiency. Verify that the input voltage remains above the minimum threshold to ensure proper regulation under all load conditions.
Part Context
This regulator belongs to the LD1117 family of low-dropout devices known for high efficiency due to NPN pass transistors. The D-series designation indicates surface-mount packaging, specifically the SOIC-8 form factor in this instance. It serves as a direct replacement for older PNP-based regulators where lower quiescent current and higher efficiency are critical design constraints.
Replacement Considerations
LD1117DT25TR (TO-252-3 package)
FAQ
What is the minimum input voltage required for regulation?
The minimum input voltage is 3.3 V to maintain stable 2.5 V output.
Does the device require external capacitors for stability?
Yes, a minimum 10 μF capacitor is required at the output for stability.
