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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：0°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 LM1117MPX-3.3/NOPB is a fixed-output low-dropout linear regulator from 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 ensures high precision with line regulation of 1 mV and load regulation of 1 mV. It includes built-in thermal shutdown and current limiting for protection. The component is housed in a compact SOT-223 package suitable for surface-mount applications.
Feature Summary
- Provides a fixed 3.3 V output with ±1% accuracy using a Zener trimmed bandgap reference.
- Features integrated current limiting and thermal shutdown to protect against overload conditions.
- Requires a minimum 10 µF tantalum capacitor at the output to ensure stability and improve transient response.
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 ordering suffix matches the required temperature grade and packaging format. Confirm the presence of the 'NOPB' designation indicates lead-free and RoHS compliance. Ensure the supplier provides valid traceability documentation for the SOT-223 package variant. Cross-reference the manufacturer part number with official TI databases to confirm authenticity before procurement.
Selection Notes
Select this component when a fixed 3.3 V rail is required with up to 800 mA capacity. It serves as a direct replacement for older LDOs like the LM317 in fixed configurations. Consider the thermal resistance characteristics of the SOT-223 package for heat dissipation requirements. Verify that the input voltage remains within the 15 V absolute maximum rating during operation.
Part Context
This device belongs to the LM1117 family of low-dropout regulators manufactured by Texas Instruments. The series offers both adjustable and fixed voltage options, including 1.8 V, 2.5 V, 3.3 V, and 5 V variants. The LM1117 is designed for general-purpose power management applications requiring efficient linear regulation with minimal external components.
Replacement Considerations
The TLV1117 is listed as a newer drop-in alternative. For improved functionality in fixed output SOT-223 packages, the TLV761 is recommended as a drop-in replacement.
