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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 800MA 8-SOIC
- 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)：3.3V
- 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 LD1117D33TR is a fixed-output low dropout positive voltage regulator manufactured by STMicroelectronics. It provides a stable 3.3 V output with a maximum continuous current 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. It utilizes an SOIC-8 surface-mount package, supporting operation up to a maximum junction temperature of 125 °C. Internal protections include current limiting and thermal shutdown.
Feature Summary
- Fixed 3.3 V output with ±1% tolerance at 25 °C
- NPN pass transistor design for high efficiency
- Integrated internal current and thermal limiting
- Requires only a standard 10 μF minimum capacitor for stability
Applications
- Battery-powered systems requiring efficient voltage regulation
- Post-regulators for switching power supplies
- On-card regulation for general-purpose electronics
Procurement Notes
Verify the specific suffix 'TR' indicates tape-and-reel packaging when sourcing. Confirm the manufacturer is STMicroelectronics to ensure component authenticity. Check datasheet revisions for any updates regarding operating temperature ranges or electrical characteristics before finalizing procurement specifications.
Selection Notes
Select this component for applications requiring a fixed 3.3 V rail with moderate current demands up to 800 mA. The SOIC-8 package is suitable for space-constrained surface-mount designs. Ensure the input voltage remains within the specified 15 V maximum limit and that adequate thermal management is provided to handle power dissipation under load.
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, 2.5 V, 3.3 V, and 5.0 V. The D33 variant specifically denotes the 3.3 V fixed output version in the SOIC-8 package format.
Replacement Considerations
Compatible replacements within the same family include LD1117S33CTR (SOT-223 package) and LD1117V33 (TO-220 package). These variants share identical electrical performance but differ in physical footprint and thermal handling capabilities.
