MCP1826S-1802E/DB Microchip Integrated Circuit (SOT223 (3-Pin)) In Stock
Microchip MCP1826S-1802E/DB is a fixed 1.8 V low-dropout linear regulator delivering 1 A output current with only 0.25 V typical dropout voltage. Input range spans 2.3 V to 6 V in a compact SOT-223-3 package. Available from stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- SOT223 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP1826S-1802E/DB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3060(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP1826S-1802E/DB?
- Fixed 1.8 V output with ±2% accuracy and 1 A continuous output current in a thermally efficient SOT-223-3 package
- Ultra-low 0.25 V typical dropout voltage (0.4 V maximum at 1 A), maximizing headroom in 3.3 V to 1.8 V conversion designs
- Wide 2.3 V to 6 V input range with stable operation down to near-dropout conditions, suitable for single-cell Li-ion powered systems
- Fast transient response and internal current limiting plus thermal shutdown for robust, self-protecting power rail management
- RoHS-compliant, Pb-free SOT-223-3 footprint with exposed pad for improved thermal dissipation in high-current applications
What is MCP1826S-1802E/DB used for?
The MCP1826S-1802E/DB is ideal for generating a stable 1.8 V core supply for microcontrollers, FPGAs, and DDR memory interfaces from a 3.3 V or 5 V bus in embedded systems and IoT devices. Its 1 A output capacity and low 0.25 V dropout make it well suited for battery-powered designs where a single Li-ion or two AA cells must deliver regulated 1.8 V to digital logic with minimal waste heat. The SOT-223-3 package with its large pad also provides adequate thermal performance for USB-powered accessories and industrial sensor nodes requiring a point-of-load 1.8 V rail.
What are the specifications of MCP1826S-1802E/DB?
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-223-3 |
| YTEOL | 9 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.4V |
| Dropout Voltage1-Nom | 0.25V |
| Input Voltage Absolute-Max | 6.5V |
| Input Voltage-Max | 6V |
| Input Voltage-Min | 2.3V |
| JESD-30 Code | R-PSSO-G3 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.01332% |
| Load Regulation-Max | 0.018% |
| 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 | 1.845V |
| Output Voltage1-Min | 1.755V |
| Output Voltage1-Nom | 1.8V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOT-223 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG |
| Packing Method | TUBE |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | CMOS |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 2.3mm |
| Terminal Position | SINGLE |
| Voltage Tolerance-Max | 2.5% |
| Package | SOT223 (3-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Taiwan, Thailand |
Where can I find the MCP1826S-1802E/DB datasheet?
MCP1826S-1802E/DB Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP1826S-1802E/DB?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the output voltage accuracy and maximum output current of the MCP1826S-1802E/DB?
The MCP1826S-1802E/DB provides a fixed 1.8 V output regulated to within ±2% accuracy across load and temperature, and delivers up to 1 A continuous output current. Internal current limiting protects the device if the load exceeds 1 A, while thermal shutdown prevents damage if the junction temperature rises above safe limits, making it robust in unattended embedded applications.
How low a dropout voltage does the MCP1826S-1802E/DB achieve when converting 3.3 V to 1.8 V?
At full 1 A load, the MCP1826S-1802E/DB exhibits a typical dropout voltage of 0.25 V and a maximum of 0.4 V, so it maintains a regulated 1.8 V output from input voltages as low as 2.3 V. When converting from a 3.3 V bus, the 1.5 V headroom far exceeds the 0.4 V maximum dropout, ensuring stable regulation even with input ripple of several hundred millivolts.
Which battery chemistries and input voltage sources are compatible with the MCP1826S-1802E/DB?
The device accepts input voltages from 2.3 V to 6 V, covering single-cell Li-ion batteries (2.7 V to 4.2 V), two-cell NiMH packs (around 2.4 V to 3.0 V), USB 5 V rails, and 3.3 V system buses. This broad 2.3 V to 6 V input range lets designers use a single BOM line across multiple hardware platforms without changing the LDO or surrounding capacitors.
What is the thermal performance of the SOT-223-3 package for a 1 A load scenario?
The SOT-223-3 package has a thermal resistance of approximately 50°C/W junction-to-board when soldered with its large exposed pad connected to a PCB copper plane. At 1 A load converting 3.3 V input to 1.8 V output, power dissipation is about 1.5 W, which keeps junction temperature well within limits at room temperature on a modest copper pour. For worst-case 6 V input at 1 A, dissipation reaches 4.2 W, requiring a larger ground plane or reduced ambient temperature to stay below the 125°C maximum junction temperature.
When is the MCP1826S-1802E/DB a practical alternative to a switching regulator for a 1.8 V rail?
An LDO like the MCP1826S is preferred over a switching regulator when the input-to-output differential is small (under 1.5 V), switching noise would interfere with ADC or RF circuitry, and BOM simplicity matters more than efficiency. At 1 A from a 3.3 V source, efficiency is about 55%, acceptable for loads under 500 mA where the 250 mW dissipation is manageable. The SOT-223-3 requires no inductor, no freewheeling diode, and only 1 µF input and output ceramic capacitors, cutting board area compared to a 1 A buck converter.
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