REG1117A-1.8G4 Texas Instruments Integrated Circuit (SOT223 (3-Pin)) In Stock
The REG1117A-1.8G4 is a fixed 1.8V, 1A low-dropout linear voltage regulator from Texas Instruments in a 4-pin SOT-223 package. It delivers up to 1A output current with a maximum dropout voltage of 1.55V and input voltage range of 3.8V to 15V. Available from authorized distributors with fast worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- SOT223 (3-Pin)
- Pin Count
- 4
- Lifecycle
- OBSOLETE
- Datasheet
- REG1117A-1.8G4 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.4823(MOQ 320)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 1.8V output with tight regulation — maximum line regulation of 0.007% ensures stable supply for sensitive circuits
- Low dropout voltage of 1.2V typical (1.55V max) at 1A load, enabling efficient operation from low input supplies
- Compact 4-pin SOT-223 package with exposed tab for enhanced thermal dissipation, supporting up to 1A continuous output current
- Wide input voltage range from 3.8V to 15V suits diverse power supply topologies including USB and wall-adapter sources
Applications
The REG1117A-1.8G4 is well suited for powering 1.8V core logic in FPGAs, microcontrollers, and DSPs where a stable, low-noise supply is critical. It is commonly used in portable consumer electronics, IoT edge nodes, and industrial sensor boards that require efficient post-regulation from a 3.3V or 5V bus. Its compact SOT-223 footprint and thermal tab also make it a practical choice for space-constrained PCB designs demanding moderate current delivery.
Specifications
| YTEOL | 0 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 1.55V |
| Dropout Voltage1-Nom | 1.2V |
| Input Voltage Absolute-Max | 15V |
| Input Voltage-Max | 15V |
| Input Voltage-Min | 3.8V |
| JESD-30 Code | R-PDSO-G4 |
| JESD-609 Code | e4 |
| Line Regulation-Max | 0.007% |
| Load Regulation-Max | 0.01% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 1A |
| Output Voltage1-Max | 1.836V |
| Output Voltage1-Min | 1.764V |
| Output Voltage1-Nom | 1.8V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOT-223 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 2.3mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Voltage Tolerance-Max | 2% |
| Package | SOT223 (3-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for REG1117A-1.8G4:
Frequently Asked Questions
What is the output voltage and maximum output current of the REG1117A-1.8G4?
The REG1117A-1.8G4 provides a fixed 1.8V regulated output and can supply up to 1A of continuous output current. It is a fixed-output LDO regulator, meaning no external resistor divider is required to set the output voltage.
What is the dropout voltage of the REG1117A-1.8G4 at full load?
At full 1A load, the REG1117A-1.8G4 has a typical dropout voltage of 1.2V and a maximum dropout voltage of 1.55V. This means the input supply must be at least 3.35V (1.8V + 1.55V) to maintain regulation, which is well within the specified 3.8V minimum input voltage.
What package does the REG1117A-1.8G4 use, and how does it help with thermal management?
The REG1117A-1.8G4 comes in a 4-pin SOT-223 package (3 leads plus an exposed thermal tab). The tab is connected to the output pin and can be soldered directly to a PCB copper pour, providing a low thermal resistance path that significantly reduces junction temperature during high-current operation.
What are typical applications for the REG1117A-1.8G4?
Typical applications include powering 1.8V core logic for FPGAs, microcontrollers, and memory devices, as well as supplying 1.8V rails in IoT nodes, portable instruments, and industrial control boards. It is also commonly used as a post-regulator on 3.3V or 5V bus systems where a clean, low-ripple 1.8V supply is needed.
Is the REG1117A-1.8G4 RoHS compliant, and what is its JEDEC moisture sensitivity rating?
Yes, the REG1117A-1.8G4 carries a JESD-609 code of e4, indicating it is RoHS compliant with lead-free construction. Its moisture sensitivity level follows standard JEDEC J-STD-020 requirements for the SOT-223 package, making it suitable for lead-free reflow soldering processes.
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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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 320+ | $1.4823 | $474.35 |
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