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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 800MA 8-WSON
- Series：LM1117-3.3
- 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)：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：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：8-WDFN Exposed Pad
- Supplier Device Package：8-WSON (4x4)
- Grade：-
- Qualification：-
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Overview
The LM1117ILD-3.3/NOPB is a fixed-output low-dropout linear regulator from Texas Instruments, delivering a nominal 3.3V output with an 800mA load current capacity. It operates within an industrial temperature range of -40°C to +125°C and features a maximum dropout voltage of 1.2V at full load. The device includes internal current limiting and thermal shutdown protection, ensuring robust performance in power management applications requiring stable voltage regulation.
Feature Summary
- Industrial-grade operation across extended temperature ranges
- Integrated current limiting and thermal shutdown protection
- Low dropout voltage for efficient power conversion
- Fixed 3.3V output with high line and load regulation
Applications
- Post regulator for switching DC-DC converters
- High-efficiency linear regulators
- Battery chargers
- Portable instrumentation power supplies
- Active SCSI termination regulators
Procurement Notes
Verify the specific suffix 'ILD' against official Texas Instruments documentation to confirm package type and exact electrical tolerances. Ensure the component meets RoHS compliance requirements for your assembly process. Cross-reference the datasheet revision history to confirm availability status and any potential design changes associated with this specific ordering variant.
Selection Notes
Select this component when a fixed 3.3V supply is required with up to 800mA capability in industrial environments. Consider the thermal resistance characteristics of the SOT-223 package for heat dissipation needs. Ensure input voltage remains within the 15V maximum rating while maintaining sufficient headroom above the dropout voltage for stable regulation under all load conditions.
Part Context
This part belongs to the LM1117 family of low-dropout regulators known for their versatility and ease of use. The LM1117 series offers both adjustable and fixed voltage options, making it suitable for various power management tasks. The 'I' designation indicates industrial temperature range suitability, expanding its operational utility beyond commercial limits.
Replacement Considerations
LM1117IDT-3.3/NOPB
FAQ
What is the minimum output capacitance required for stability?
A minimum of 10-µF tantalum capacitor is required at the output to improve transient response and ensure regulator stability.
How does the LM1117 handle overcurrent conditions?
The device incorporates internal current limiting circuitry that protects the regulator from damage during short-circuit or overload events.
