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Product Detailed Parameters
- Description：IC REG LINEAR 2.5V 800MA TO220-3
- 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：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220-3
- Grade：-
- Qualification：-
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Overview
The LM1117T-2.5 is a fixed positive low-dropout linear regulator manufactured by Texas Instruments, formerly National Semiconductor. It provides a fixed output voltage of 2.5 V with a maximum output current of 800 mA. The device features a dropout voltage of 1.2 V at full load and operates within an input voltage range of 3.9 V to 10 V. It utilizes a TO-220-3 through-hole package and includes internal thermal overload and short-circuit protection. The typical power supply rejection ratio (PSRR) is 75 dB, and the quiescent current is 10 mA. The operating temperature range extends from -40°C to +125°C.
Feature Summary
- Fixed positive output voltage regulation
- Low dropout performance for efficient power conversion
- Integrated thermal overload and short-circuit protection
Applications
- Battery-powered systems requiring stable voltage rails
- Post-regulation for switching power supplies
- General-purpose power management in embedded circuits
Procurement Notes
Verify that the component is sourced as a Texas Instruments product, as National Semiconductor's semiconductor assets were acquired by TI. Confirm the suffix 'NOPB' indicates lead-free and RoHS compliance. Ensure the package matches the specified TO-220-3 form factor for through-hole mounting requirements.
Selection Notes
Select this regulator when a fixed 2.5 V rail is required with up to 800 mA load capability. The TO-220-3 package is suitable for applications where thermal dissipation is managed via heatsinking or PCB copper area. Verify that the input voltage remains within the 10 V maximum limit to prevent damage.
Part Context
This component belongs to the LM1117 series of low-dropout regulators. The series offers both adjustable and fixed output versions. The LM1117T-2.5 specifically denotes the fixed 2.5 V variant in a TO-220 package. The series is widely used for replacing standard 78xx regulators due to lower dropout voltage and better efficiency.
Replacement Considerations
LM1117DT-2.5/NOPB: Surface mount D2PAK equivalent. LM1117SOT223-2.5/NOPB: SOT-223 package variant. LM1117HVT-2.5: High-voltage version if input exceeds 10 V.
