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Product Detailed Parameters
- Description：IC REG LINEAR 2.5V 800MA TO252-3
- Series：-
- Mfr：National Semiconductor
- Package：Bulk
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：2.5V
- 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-2.5/NOPB is a fixed-output low-dropout linear regulator manufactured by Texas Instruments, continuing the National Semiconductor product line. It provides a fixed positive output voltage of 2.5V with a maximum output current of 800mA. The device features a typical dropout voltage of 1.2V at full load and operates within an input voltage range up to 15V. It is housed in a TO-252 (DPAK) surface-mount package with three terminals: Input, Ground, and Output. The unit supports operation across a temperature range from -40°C to +125°C.
Feature Summary
- Fixed positive output voltage configuration eliminates external resistor networks for standard voltage rails.
- Low dropout performance allows efficient regulation with minimal input-to-output voltage differential.
- Integrated thermal shutdown and current limiting protect the device under fault conditions.
Applications
- Battery-powered systems requiring stable 2.5V reference or logic supply
- Post-regulation of higher voltage rails to 2.5V in embedded circuits
- Portable equipment power management where space and efficiency are constrained
Procurement Notes
Verify that the ordering suffix /NOPB confirms lead-free and RoHS compliance status as per manufacturer specifications. Confirm the package designation DT corresponds to the TO-252 form factor required for your PCB layout. Ensure the fixed 2.5V output matches your system requirements, as adjustable variants exist within the same series. Cross-reference the manufacturer identifier to confirm Texas Instruments origin given the historical National Semiconductor lineage.
Selection Notes
Select this component when a precise 2.5V fixed output is needed without external programming resistors. The TO-252 package offers a balance between thermal dissipation capability and surface-mount convenience. Consider the 800mA current limit against peak load demands. Verify that the input voltage remains below the 15V maximum rating while maintaining sufficient headroom above the 2.5V output plus dropout voltage for stable regulation.
Part Context
This part belongs to the LM1117 family of low-dropout linear regulators originally developed by National Semiconductor and now produced by Texas Instruments following the acquisition. The family includes adjustable versions and various fixed output voltages. The DT suffix indicates the TO-252 surface-mount package variant, distinguishing it from through-hole options like the T-series or other SOT packages.
Replacement Considerations
LM1117DT-2.5/NOPB serves as the direct equivalent for LM1117DT-2.5. Other LM1117 variants with different output voltages or packages are not electrically compatible substitutes.
