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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 800MA SOT-223
- Series：LM1117-3.3
- Mfr：Texas Instruments
- 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)：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-261-4, TO-261AA
- Supplier Device Package：SOT-223
- Grade：-
- Qualification：-
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Overview
The LM1117IMP-3.3/NOPB is a fixed-output low-dropout linear regulator manufactured by Texas Instruments, providing a stable 3.3 V output with a maximum load current of 800 mA. It operates within an extended industrial temperature range from -40°C to +125°C and utilizes a surface-mount SOT-223 package (DCY) featuring four pins. The device incorporates internal current limiting and thermal shutdown protection mechanisms. Electrical specifications include a line regulation of 1 mV and a load regulation of 1 mV at room temperature, ensuring high precision. A minimum 10 µF tantalum capacitor is required at the output terminal to maintain stability.
Feature Summary
- Provides a fixed 3.3 V regulated output voltage with ±1% accuracy under standard conditions.
- Integrates built-in current limiting and thermal shutdown circuitry for robust system protection.
- Delivers high ripple rejection performance through a Zener-trimmed bandgap reference architecture.
- Supports operation across an extended industrial junction temperature range of -40°C to +125°C.
Applications
- AC drive power stage modules
- Merchant network and server PSU
- Industrial AC/DC power supplies
- Ultrasound scanners
- Servo drive control modules
Procurement Notes
Verify that the specific suffix 'I' confirms the -40°C to +125°C operating range, as non-I variants are limited to 0°C. Confirm the 'NOPB' designation indicates lead-free and RoHS compliance status. Ensure the DCY package variant matches the required footprint dimensions of 6.50 mm by 3.50 mm for PCB layout compatibility. Validate that the supplier provides original manufacturer documentation to confirm authenticity.
Selection Notes
Select this component when a fixed 3.3 V rail is required with up to 800 mA capability in space-constrained designs. The SOT-223 package offers a balance between thermal dissipation and board area efficiency compared to larger packages. Consider the dropout voltage characteristics relative to the input supply headroom. Verify that the application environment stays within the specified -40°C to +125°C junction temperature limits for reliable operation.
Part Context
This part belongs to the LM1117 family of low-dropout linear regulators produced by Texas Instruments. The family includes adjustable versions and other fixed voltages such as 1.8 V, 2.5 V, and 5.0 V. The LM1117 series is designed to replace older three-terminal regulators, offering lower dropout voltages and higher current capacity. The 'IMP' designation specifically denotes the industrial temperature grade and SOT-223 packaging configuration.
Replacement Considerations
Texas Instruments recommends the TLV1117 as a newer drop-in alternative. For improved functionality in fixed output SOT-223 configurations, the TLV761 is suggested as a replacement option.
