MCP1703-3002E/DB Microchip Integrated Circuit (SOT223 (3-Pin)) In Stock
The MCP1703-3002E/DB is a fixed 3 V low-dropout linear regulator from Microchip with 250 mA output current and 2.7 V to 16 V input voltage range in a 4-pin SOT-223 package. It offers ±2% output accuracy with a typical 625 mV dropout voltage at full load. Available from stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- SOT223 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP1703-3002E/DB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.5080(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP1703-3002E/DB?
- Fixed 3 V output with ±2% accuracy and 250 mA maximum output current for stable low-noise power delivery in sensitive analog and digital circuits
- Wide input voltage range of 2.7 V to 16 V with 18 V absolute maximum, accommodating unregulated and battery power sources
- Low dropout voltage of typically 625 mV at 250 mA, extending battery life in portable applications by operating closer to the output rail
- Compact 4-pin SOT-223 package with exposed thermal pad enabling efficient heat dissipation without external heatsink in most applications
What is MCP1703-3002E/DB used for?
The MCP1703-3002E/DB is well suited for battery-powered portable devices, IoT sensor nodes, and microcontroller supply rails where a clean 3 V regulated output is needed from a higher unregulated input such as a 4-cell alkaline battery pack or an unregulated 5 V to 12 V adapter. Its 250 mA current capability and low dropout voltage make it ideal for powering low-power MCUs, sensors, and wireless modules in space-constrained designs. The SOT-223 package also provides adequate thermal performance for continuous-load applications in industrial and consumer electronics.
What are the specifications of MCP1703-3002E/DB?
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-223-3 |
| Factory Lead Time | 7Weeks |
| YTEOL | 8 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.975V |
| Dropout Voltage1-Nom | 0.625V |
| Input Voltage Absolute-Max | 18V |
| Input Voltage-Max | 16V |
| Input Voltage-Min | 3.975V |
| JESD-30 Code | R-PDSO-G4 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.108225% |
| Load Regulation-Max | 0.075% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.25A |
| Output Voltage1-Max | 3.06V |
| Output Voltage1-Min | 2.94V |
| Output Voltage1-Nom | 3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOT-223 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG |
| Packing Method | TUBE |
| 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 | DUAL |
| 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 | 8542.39.00.01 |
| Country of Origin | Taiwan, Thailand |
Where can I find the MCP1703-3002E/DB datasheet?
MCP1703-3002E/DB Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP1703-3002E/DB?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the dropout voltage of MCP1703-3002E/DB at full load, and why does this matter for battery-powered designs?
The MCP1703-3002E/DB has a typical dropout voltage of 625 mV and a maximum of 975 mV at 250 mA output. In a 3 V output application, this means the input supply can drop as low as approximately 3.975 V before regulation is lost, which extends usable battery life compared to regulators with dropout voltages of 1.5 V or higher.
What input voltage range does MCP1703-3002E/DB support, and is it compatible with 12 V industrial power supplies?
The MCP1703-3002E/DB supports an input voltage range of 2.7 V to 16 V with an absolute maximum of 18 V, making it directly compatible with 12 V industrial power supplies and unregulated 9 V to 15 V DC adapters. This wide range enables a single regulator to serve multiple input power scenarios without additional input clamping components in most industrial sensor applications.
How does the SOT-223 package of MCP1703-3002E/DB handle thermal dissipation at full 250 mA load?
The 4-pin SOT-223 package includes an exposed thermal pad that directly conducts heat to the PCB copper plane. At a worst-case input of 16 V and output of 3 V with 250 mA load, power dissipation is approximately 3.25 W, and the thermal junction-to-ambient resistance of the SOT-223 (typically around 60°C/W with proper copper area) requires at least 1 cm² of copper pour to stay within the 125°C junction temperature limit.
When would MCP1703-3002E/DB be selected over a switching regulator for a 3 V rail?
MCP1703-3002E/DB is preferred over a switching regulator when output noise must be below 50 µV RMS, such as in analog front-end circuits, ADC reference supplies, or RF modules where switching noise would degrade SNR. Its quiescent current is low enough for always-on sensor nodes drawing under 5 mA in standby, and the simpler 4-pin SOT-223 layout avoids the EMI shielding and inductor routing complexity of a buck converter design.
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More from Microchip
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.8400 | $0.84 |
| 25+ | $0.7000 | $17.50 |
| 100+ | $0.6400 | $64.00 |
| 1000+ | $0.5900 | $590.00 |
| 5000+ | $0.5600 | $2800.00 |
| 5070+ | $0.5080 | $2575.56 |
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