LM1117LD-1.8 Texas Instruments Integrated Circuit (Other) In Stock
LM1117LD-1.8 is a fixed 1.8 V output low-dropout linear regulator from Texas Instruments with 1.2 V dropout voltage and a maximum 20 V input rating. It features excellent line regulation of 0.006% and load regulation of 0.01%. From $0.60 in stock worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 9
- Lifecycle
- OBSOLETE
- Datasheet
- LM1117LD-1.8 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM1117LD-1.8?
- Fixed 1.8 V output with 0.006% line regulation and 0.01% load regulation ensures stable supply for 1.8 V digital logic cores and FPGAs
- Low dropout voltage of 1.2 V nominal allows operation from 3.0 V input rails common in battery-powered and USB-powered designs
- Single-output architecture in an 8-pin SOIC (PDSO-N8) package simplifies layout for point-of-load regulation on dense digital PCBs
- Wide absolute maximum input rating of 20 V protects against supply transients in industrial and automotive accessory applications
- Operating junction temperature up to 125 °C supports industrial-temperature-range designs without derating
What is LM1117LD-1.8 used for?
LM1117LD-1.8 is used as a point-of-load regulator to supply 1.8 V core power for FPGAs, microprocessors, and DDR memory interfaces in embedded systems and industrial control boards. Its low 1.2 V dropout is particularly useful when generating 1.8 V from a 3.3 V system rail with minimal headroom. The device also fits USB-powered and battery-backed instruments where a clean, regulated 1.8 V analog reference supply is needed with minimal external components.
What are the specifications of LM1117LD-1.8?
| YTEOL | 0 |
| Adjustability | FIXED |
| Dropout Voltage1-Nom | 1.2V |
| Input Voltage Absolute-Max | 20V |
| JESD-30 Code | R-PDSO-N8 |
| JESD-609 Code | e0 |
| Line Regulation-Max | 0.006% |
| Load Regulation-Max | 0.01% |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Output Current1-Max | 0.8A |
| Output Voltage1-Nom | 1.8V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOLCC8,.15,32 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 235 |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Terminal Finish | TIN LEAD |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.8mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 20 |
| Voltage Tolerance-Max | 3% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the LM1117LD-1.8 datasheet?
LM1117LD-1.8 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM1117LD-1.8?
Compatible alternatives and drop-in replacements for LM1117LD-1.8:
Frequently Asked Questions
What is the dropout voltage of LM1117LD-1.8 and how does it affect minimum input voltage?
LM1117LD-1.8 has a nominal dropout voltage of 1.2 V. To maintain a regulated 1.8 V output, the input supply must be at least 1.8 V + 1.2 V = 3.0 V. This is compatible with 3.3 V system rails, making the regulator a natural choice for generating 1.8 V FPGA or DDR memory core voltage from a 3.3 V bus.
How good is the load regulation of LM1117LD-1.8, and what does that mean for sensitive digital circuits?
LM1117LD-1.8 achieves a maximum load regulation of 0.01%, meaning the 1.8 V output changes by at most 0.18 mV per volt of load change. For a digital core that draws up to 1 A, this level of regulation prevents supply noise from coupling into clock circuits or analog references sensitive to millivolt-level variations.
What is the maximum input voltage LM1117LD-1.8 can withstand, and what does the YTEOL status mean?
LM1117LD-1.8 accepts up to 20 V absolute maximum input, providing significant overvoltage headroom for transient protection in 12 V or 5 V supply environments. However, its YTEOL is 0, indicating this part is at or approaching end-of-life. New designs should consider Texas Instruments' current LDO portfolio for long-term supply assurance, and existing users should plan inventory accordingly.
What package does LM1117LD-1.8 use, and how many outputs does it provide?
LM1117LD-1.8 is housed in an 8-pin SOIC package (PDSO-N8) and provides a single regulated 1.8 V output. The SOIC-8 footprint is easy to hand-solder and widely supported by pick-and-place equipment, making it practical for both prototype development and moderate-volume production of embedded system boards.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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