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Product Detailed Parameters
- Description：IC REG LINEAR 5V 800MA 8-WSON
- Series：-
- Mfr：National Semiconductor
- Package：Bulk
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：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：8-WDFN Exposed Pad
- Supplier Device Package：8-WSON (4x4)
- Grade：-
- Qualification：-
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Overview
The LM1117LD-5.0/NOPB is a low dropout linear regulator manufactured by Texas Instruments, originally part of the National Semiconductor portfolio. It provides a fixed positive output voltage of 5V with a maximum load current capacity of 800mA. The device features a typical dropout voltage of 1.2V at full load and offers high power supply rejection ratio (PSRR) of 75dB. It operates within an extended temperature range from -40°C to +125°C. The component is housed in an 8-pin WSON package with an exposed pad for thermal management.
Feature Summary
- Fixed 5V output voltage with ±1% initial accuracy
- Integrated overcurrent and thermal shutdown protection
- Low noise performance with 75µVRMS output noise
- Compatible with standard tantalum or aluminum electrolytic capacitors
Applications
- Battery-powered systems requiring efficient voltage regulation
- Post-regulation for switching power supplies
- Line drivers and control circuits
- General-purpose power management in embedded systems
Procurement Notes
Verify that the ordering suffix /NOPB confirms lead-free and RoHS compliance as per manufacturer specifications. Confirm the package designation LD corresponds to the 8-WSON variant. Ensure the input voltage does not exceed the absolute maximum rating to prevent device damage. Cross-reference the manufacturer number with official Texas Instruments documentation to validate authenticity and revision status before procurement.
Selection Notes
Select this component when a fixed 5V rail is required with up to 800mA load capability. It is suitable for applications where space constraints favor the compact WSON package over larger TO-220 or SOT-223 options. Consider the thermal dissipation requirements due to the small footprint. Ensure the input-to-output differential voltage remains within the specified dropout characteristics for stable regulation under all load conditions.
Part Context
This device belongs to the LM1117 series of low-dropout regulators, known for their pin-out compatibility with the older LM317 adjustable regulator family. The LM1117LD variant specifically denotes the WSON package version, distinguishing it from through-hole TO-220 or surface-mount SOT-223 packages. The series is widely used in consumer electronics and industrial equipment for reliable linear regulation.
Replacement Considerations
- LM1117DT-5.0/NOPB
- LM1117MPX-5.0/NOPB
FAQ
What type of output capacitor is recommended for stability?
The datasheet specifies that non-ceramic output capacitors, such as tantalum or aluminum electrolytic, are required for stability and transient response improvement.
Does the LM1117LD-5.0/NOPB include protection features?
Yes, it includes internal overcurrent limiting and thermal shutdown protection to safeguard the device under fault conditions.
