MCP1826T3302E/DB Microchip Integrated Circuit (SOT223 (3-Pin)) In Stock
Microchip MCP1826T3302E/DB is a low-dropout (LDO) linear voltage regulator providing a fixed 3.3 V output in a SOT-223 package with up to 1 A output current. It features low dropout voltage and stable operation across a wide input voltage range for powering digital and analog circuits. Available in stock with worldwide shipping for embedded and consumer electronics designs.
- Manufacturer
- Microchip
- Package
- SOT223 (3-Pin)
- Pin Count
- 4
- Lifecycle
- ACTIVE
- Datasheet
- MCP1826T3302E/DB Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 3.3 V output with up to 1 A continuous current capability in a compact SOT-223 package
- Low dropout voltage enabling regulation from input supplies as low as 3.5 V for battery-powered designs
- SOT-223 package with exposed thermal pad providing enhanced heat dissipation for sustained high-current operation
- Wide input voltage range and stable output regulation compatible with 5 V USB and Li-ion battery input sources
Applications
The MCP1826T3302E/DB is designed to supply regulated 3.3 V power to microcontrollers, sensors, and wireless modules in battery-powered IoT devices and embedded systems where low dropout and 1 A output are essential. Its SOT-223 package with thermal pad efficiently dissipates heat at higher load currents without requiring large external heatsinks on compact PCBs. The regulator is also widely used in USB-powered accessories, industrial sensor nodes, and point-of-load power stages requiring a stable 3.3 V rail derived from 5 V or Li-ion battery sources.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MCP1826T3302E/DB:
Frequently Asked Questions
What output voltage and maximum current does MCP1826T3302E/DB deliver?
The MCP1826T3302E/DB provides a fixed 3.3 V regulated output with a maximum continuous output current of 1 A. The low-dropout architecture allows the input voltage to drop as low as approximately 3.5 V while still maintaining a stable 3.3 V output, making it suitable for single-cell Li-ion battery applications where input voltage varies from about 3.5 V to 4.2 V.
Why does the SOT-223 package of MCP1826T3302E/DB improve thermal performance compared to SOT-23?
The SOT-223 package includes a large exposed metal tab connected to the output pin that acts as a heatsink, allowing the MCP1826T3302E/DB to dissipate the power difference (V_in minus 3.3 V) multiplied by load current — for example, at 1 A from a 5 V source, it dissipates 1.7 W. Without the tab, a smaller SOT-23 package would overheat at this load; the SOT-223 tab reduces junction temperature by providing a direct thermal path to the PCB copper pours below.
How can MCP1826T3302E/DB supply a 3.3 V rail in a USB-powered embedded system?
In a USB-powered design where VBUS is 5 V, the MCP1826T3302E/DB accepts the 5 V input and regulates it down to 3.3 V with a 1.7 V dropout across up to 1 A of load current. This covers the full 3.3 V power budget of typical microcontroller systems consuming less than 500 mA, and the fixed output eliminates the need for external resistor dividers required by adjustable LDO alternatives, simplifying BOM and board layout.
When would MCP1826T3302E/DB be preferred over a switching regulator for a 3.3 V supply?
MCP1826T3302E/DB is preferred over a switching regulator when low output noise and simplified PCB layout are priorities, such as in analog sensor power supplies or audio processing circuits where switching ripple on the 3.3 V rail would degrade signal quality. At load currents below 500 mA from a 5 V source, the efficiency penalty of the 1.7 V dropout is acceptable, and the LDO's smaller 3-pin SOT-223 footprint and absence of external inductors reduce total component cost compared to a step-down converter.
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