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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 800MA 8-WSON
- 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：0°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：8-WDFN Exposed Pad
- Supplier Device Package：8-WSON (4x4)
- Grade：-
- Qualification：-
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Overview
The LM1117LD-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 a junction temperature range of 0°C to +125°C and features a typical dropout voltage of 1.2 V at full load. 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 under standard conditions. It utilizes a SOT-223 package for surface-mount applications.
Feature Summary
- Provides a fixed 3.3 V regulated output suitable for powering digital logic and analog circuits.
- Integrates internal current limiting and thermal shutdown to protect against overload and overheating conditions.
- Utilizes a Zener-trimmed bandgap reference circuit to ensure high output voltage accuracy.
Applications
- AC drive power stage modules
- Merchant network and server PSU
- Industrial AC/DC power supplies
Procurement Notes
Verify the specific suffix 'LD' against the manufacturer's official documentation to confirm package type and availability status. Ensure the component meets RoHS compliance requirements for your target market. Confirm that the operating temperature range aligns with your system's environmental constraints before finalizing procurement.
Selection Notes
Select this component when a fixed 3.3 V rail is required with up to 800 mA capacity. Ensure the input voltage provides sufficient headroom above the dropout voltage. Verify that the PCB layout supports the thermal dissipation needs of the SOT-223 package. Consider the TLV1117 if an extended -40°C to +125°C temperature range is necessary.
Part Context
This part belongs to the LM1117 family of low-dropout regulators from Texas Instruments. The series offers both adjustable and fixed voltage options in various packages including SOT-223 and WSON. The LM1117 is designed as a drop-in replacement for traditional 78xx regulators, offering lower dropout voltages and higher current capabilities.
Replacement Considerations
The TLV1117 is identified as a newer drop-in alternative with improved functionality. For fixed output SOT-223 configurations requiring enhanced performance, the TLV761 is also recommended as a replacement option.
