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Product Detailed Parameters
- Description：IC REG LIN 3.3V 800MA SOT-223-4
- 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-223-4
- Grade：-
- Qualification：-
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Overview
The LM1117IMPX-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 input voltage range up to 15 V and features a typical dropout voltage of 1.2 V at full load. The device incorporates internal current limiting and thermal shutdown protection mechanisms. It utilizes a Zener-trimmed bandgap reference to ensure output voltage accuracy within ±1%. Designed for surface-mount applications, it is housed in a compact SOT-223 package.
Feature Summary
- Integrated current limiting and thermal shutdown protection
- Zener-trimmed bandgap reference for high voltage accuracy
- Low dropout voltage operation under heavy loads
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 the specific suffix 'NOPB' indicates lead-free and RoHS compliance as per Texas Instruments standards. Confirm the 'I' designation corresponds to the industrial temperature range of -40°C to +125°C. Ensure the ordering code matches the SOT-223 package configuration required for your PCB layout. Cross-reference the datasheet revision date to confirm the latest electrical characteristics and application guidelines are being utilized.
Selection Notes
Select this component when a fixed 3.3 V rail is required with moderate current demands up to 800 mA. It serves as a direct replacement for older LM317 designs in fixed-voltage configurations due to identical pinouts. Consider the thermal resistance of the SOT-223 package during high-power dissipation scenarios. Evaluate the need for external capacitors to maintain stability and transient response performance.
Part Context
This part belongs to the LM1117 family of low-dropout regulators from Texas Instruments. The series offers both adjustable and fixed output versions in various packages including SOT-223, TO-220, and WSON. The LM1117 is designed for general-purpose linear regulation applications requiring efficient power management with minimal external components.
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.
