MCP1826ST-3302E/DB Microchip Integrated Circuit (SOT223 (3-Pin)) In Stock
MCP1826ST-3302E/DB is a fixed 3.3 V low-dropout linear regulator delivering up to 1 A output current with a maximum 400 mV dropout voltage. It operates from a 3.78 V to 6 V input supply and provides stable 3.3 V output for powering microcontrollers and digital logic. Packaged in a 3-pin SOT-223, it is ideal for embedded systems, IoT nodes, and point-of-load regulation on 5 V or USB-powered boards.
- Manufacturer
- Microchip
- Package
- SOT223 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP1826ST-3302E/DB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.6500(MOQ 25)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 3.3 V output voltage with tight regulation accuracy
- Up to 1 A output current for moderate-load embedded systems
- Low 250 mV typical dropout voltage extending battery runtime
- Input voltage range of 3.78 V to 6 V covering USB 5 V and Li-ion sources
- SOT-223-3 package with exposed pad for improved thermal dissipation
- Low quiescent current reducing power consumption in idle operation
Applications
The MCP1826ST-3302E/DB provides stable 3.3 V power regulation for microcontrollers, wireless modules, and sensors in battery-powered IoT devices and embedded systems. Its 1 A current capability and low 250 mV dropout make it suitable for converting from USB 5 V or single-cell Li-ion sources directly to logic supply rails. The device is also used in data acquisition boards, motor driver control circuits, and handheld consumer electronics requiring a reliable 3.3 V rail from a compact SOT-223 footprint.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-223-3 |
| Factory Lead Time | 7Weeks |
| 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 | 3.7825V |
| JESD-30 Code | R-PSSO-G3 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.0146355% |
| Load Regulation-Max | 0.033% |
| 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 | 3.3825V |
| Output Voltage1-Min | 3.2175V |
| Output Voltage1-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOT-223 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| 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 |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| 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 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MCP1826ST-3302E/DB:
suggested
Frequently Asked Questions
Can the MCP1826ST-3302E/DB supply enough current to power an ESP32 Wi-Fi module and a microcontroller simultaneously?
The regulator provides up to 1 A continuous output current at 3.3 V, which is sufficient for an ESP32 drawing up to 240 mA during Wi-Fi transmission plus an STM32 microcontroller consuming under 50 mA. Total combined load of approximately 300 mA leaves 700 mA of headroom for additional sensors or peripherals, provided the input voltage stays above the 3.78 V minimum.
How does the 250 mV typical dropout voltage help when powering from a USB bus or single Li-ion cell?
With a 250 mV typical dropout, the regulator maintains a stable 3.3 V output from inputs as low as 3.55 V. A USB 5 V bus provides 1.45 V of margin above dropout, while a Li-ion cell discharged to 3.6 V still delivers the 3.3 V output correctly. This extends usable battery capacity compared to LDOs with 500 mV or higher dropout voltages.
For a 5 V to 3.3 V conversion delivering 500 mA, how much power does this LDO dissipate and is the SOT-223 package thermally adequate?
At 500 mA load with 5 V input and 3.3 V output, the dropout across the device is 1.7 V, dissipating 850 mW of heat. The SOT-223-3 package has a junction-to-ambient thermal resistance of approximately 50°C/W when soldered to a PCB with a copper pour. At 850 mW dissipation the die junction temperature rises about 42°C above ambient, staying within the 125°C maximum junction rating in a 25°C ambient environment.
What is the input voltage limit of this regulator, and does it protect against accidental 6.5 V transients from an unregulated supply?
The device has an absolute maximum input voltage of 6.5 V, which provides marginal protection against brief transients above the 6 V rated maximum operating input. However, sustained voltages above 6 V should be avoided to prevent damage. For designs connected to unregulated wall adapters that may spike above 6 V, a series diode or transient voltage suppressor clamping below 6.5 V is recommended to protect the regulator's input pin.
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