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Product Detailed Parameters
- Description：IC REG LIN 2.85V 800MA TO252-3
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：2.85V
- 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 LM1117DTX-2.85/NOPB is a fixed-output low-dropout linear regulator from Texas Instruments, providing a nominal 2.85 V output with an 800 mA maximum load current capability. It operates within a junction temperature range of 0°C to 125°C and features a typical dropout voltage of 1.2 V at full load. The device incorporates internal current limiting and thermal shutdown protection mechanisms. Its circuit utilizes a Zener-trimmed bandgap reference to ensure output voltage accuracy within ±1%. This component is housed in a surface-mount SOT-223 package.
Feature Summary
- Provides a fixed 2.85 V output voltage with high precision regulation
- Delivers up to 800 mA of continuous output current
- Integrates internal current limiting and thermal shutdown for robust operation
Applications
- Post regulator for switching DC-DC converters
- Battery charger circuits
- Portable instrumentation power supplies
Procurement Notes
Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status as per manufacturer documentation. Confirm the 'DTX' designation corresponds to the SOT-223 package variant. Ensure the operating environment remains within the specified 0°C to 125°C junction temperature limits to maintain guaranteed performance parameters.
Selection Notes
Select this component when a stable 2.85 V rail is required for analog or digital loads drawing up to 800 mA. It serves as a suitable replacement for older LM317-based designs due to identical pinouts but improved efficiency. Ensure input voltage provides sufficient headroom above the dropout threshold to maintain regulation under all load conditions.
Part Context
This part belongs to the LM1117 family of low-dropout regulators manufactured by Texas Instruments. The series includes adjustable versions and other fixed voltages such as 1.8 V, 2.5 V, 3.3 V, and 5.0 V. The LM1117 is widely used in power management applications requiring efficient linear regulation with minimal external component count.
Replacement Considerations
LM1117T-2.85/NOPB (TO-220 package)
FAQ
Is the LM1117DTX-2.85/NOPB adjustable?
No, it is a fixed-output regulator providing a constant 2.85 V.
What is the minimum output capacitance required?
A minimum of 10 µF tantalum capacitor is required at the output for stability.
