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Product Detailed Parameters
- Description：IC REG LINEAR 2.5V 800MA SOT-223
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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：TO-261-4, TO-261AA
- Supplier Device Package：SOT-223
- Grade：-
- Qualification：-
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Overview
The LD1117S25TR is a fixed positive low-dropout voltage regulator manufactured by STMicroelectronics. It provides a fixed output voltage of 2.5 V with a maximum output current capability of 950 mA. The device operates within an input voltage range from 3.3 V to 15 V and features a typical dropout voltage of 1 V, with a maximum specified at 1.1 V. It utilizes a SOT-223-3 surface-mount package and maintains a line regulation of 6 mV and load regulation of 10 mV. The unit supports operation across a temperature range from 0°C to +125°C.
Feature Summary
- Provides stable regulated power through internal current and thermal limiting mechanisms
- Optimizes thermal performance and reduces footprint via the SOT-223 surface mount package
- Ensures high efficiency by directing quiescent current primarily into the load
Applications
- Battery-powered systems requiring efficient voltage regulation
- Post-regulation stages for switching power supplies
- Portable equipment utilizing low-voltage logic circuits
Procurement Notes
Verify the specific suffix against official documentation to confirm pinout compatibility and package variations. Ensure the component meets RoHS requirements if restricted substances are mandated. Confirm that the operating environment remains within the specified thermal limits to maintain reliability. Cross-reference datasheet specifications with system design constraints before finalizing procurement decisions.
Selection Notes
Select this component when a fixed 2.5 V rail is required with moderate current demands up to 950 mA. The SOT-223 package is suitable for applications prioritizing space efficiency over high-power dissipation capabilities. Verify that the input voltage exceeds the minimum requirement while staying below the maximum limit to ensure proper regulation and stability under all expected load conditions.
Part Context
This part belongs to the LD1117 series of adjustable and fixed low-dropout positive voltage regulators. The series offers various fixed output voltages including 1.2 V, 1.8 V, 3.3 V, and 5.0 V, alongside an adjustable version. The family is designed for applications requiring high efficiency and tight output voltage tolerance, available in multiple packages such as DPAK, SO-8, and TO-220.
Replacement Considerations
LD1117S25CTr-NP
FAQ
What is the minimum capacitor requirement for stability?
A minimum 10 μF capacitor is required for stability.
What is the output voltage tolerance at 25 °C?
The output voltage tolerance is within ± 1 % at 25 °C due to on-chip trimming.
