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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 800MA TO252-3
- Series：LM1117-3.3
- Mfr：Texas Instruments
- Package：Tube
- 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)：5 mA
- Current - Supply (Max)：10 mA
- PSRR：75dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：TO-252-3, DPAK (2 Leads + Tab), SC-63
- Supplier Device Package：TO-252-3
- Grade：-
- Qualification：-
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Overview
The LM1117IDT-3.3/NOPB is a fixed-output low-dropout linear regulator manufactured by Texas Instruments, delivering a nominal 3.3 V output with a maximum load current of 800 mA. It operates within an input voltage range up to 15 V and features a typical dropout voltage of 1.2 V at full load. The device provides line regulation of 1 mV and load regulation of 1 mV, ensuring stable performance across varying conditions. It incorporates internal current limiting and thermal shutdown protection mechanisms. The component utilizes a surface-mount TO-252 (NDP) package configuration.
Feature Summary
- Integrated current limiting and thermal shutdown for robust circuit protection
- Zener trimmed bandgap reference ensures high output voltage accuracy
- Low dropout characteristic enables efficient operation with minimal input-to-output differential
Applications
- AC drive power stage modules
- Merchant network and server PSU
- Industrial AC/DC systems
- Ultrasound scanners
- Servo drive control modules
Procurement Notes
Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status as per manufacturer documentation. Confirm the 'DT' designation corresponds to the TO-252 package variant. Ensure the ordering code matches the fixed 3.3 V output requirement rather than adjustable or other voltage variants within the LM1117 family.
Selection Notes
Select this component when a fixed 3.3 V rail is required with up to 800 mA capacity in a compact SMD form factor. Consider the 1.2 V dropout voltage when determining minimum input voltage requirements. Evaluate thermal dissipation capabilities based on the expected ambient temperature and PCB copper area available for heat spreading.
Part Context
This part belongs to the LM1117 series of 800 mA low-dropout linear regulators from Texas Instruments. The series includes adjustable versions and multiple fixed voltage options such as 1.8 V, 2.5 V, and 5.0 V. The LM1117IDT-3.3/NOPB specifically denotes the industrial grade (-40°C to +125°C) fixed 3.3 V version in the TO-252 package.
Replacement Considerations
Texas Instruments recommends the TLV1117 as a newer drop-in alternative for the LM1117 series. For applications requiring improved functionality in a fixed output SOT-223 package configuration, the TLV761 is suggested as a replacement option.
