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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：0°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 LM1117DT-3.3/NOPB is a positive low-dropout linear regulator manufactured by Texas Instruments, delivering an output current of up to 800 mA with a fixed 3.3 V output voltage. It operates within an input voltage range of up to 15 V and maintains regulation with a dropout voltage of 1.2 V at full load. The device features line regulation of 1 mV and load regulation of 1 mV, ensuring stable performance across varying conditions. It includes built-in thermal shutdown and current limiting for protection. The component is housed in a surface-mount SOT-223 package and supports an operating temperature range from 0°C to +125°C.
Feature Summary
- Integrated thermal shutdown and current limiting protect the device under overload or overheating conditions.
- Zener trimmed bandgap reference ensures high output voltage accuracy without requiring external adjustment components.
- Low dropout voltage capability allows efficient operation when the input voltage is close to the regulated output level.
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 part number matches the required fixed 3.3 V output configuration and the SOT-223 package type. Confirm the suffix /NOPB indicates lead-free and RoHS compliance as per manufacturer specifications. Ensure the ordering code corresponds to the standard LM1117 series rather than the extended temperature LM1117I variant if the application requires the 0°C to +125°C range.
Selection Notes
Select this component for applications requiring a robust 800 mA linear regulator with minimal external circuitry. The fixed 3.3 V output eliminates the need for external resistors used in adjustable versions. Consider the thermal resistance characteristics of the SOT-223 package when designing for high ambient temperatures or significant power dissipation scenarios.
Part Context
This device belongs to the LM1117 family of low-dropout linear regulators produced by Texas Instruments. The family offers both adjustable and fixed output options in various packages including TO-220, TO-252, and WSON. The LM1117DT-3.3/NOPB specifically utilizes the SOT-223 form factor, providing a compact solution for space-constrained designs while maintaining the core performance characteristics of the series.
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.
