MCP1703T-2502E/DB Microchip Integrated Circuit (SOT223 (3-Pin)) In Stock
MCP1703T-2502E/DB is a fixed 2.5 V LDO linear regulator from Microchip providing 250 mA output current, 0.75 V nominal dropout, and up to 16 V input voltage with low quiescent current. Packaged in a SOT-223-3 for robust thermal handling.
- Manufacturer
- Microchip
- Package
- SOT223 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP1703T-2502E/DB Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 2.5 V output LDO delivering 250 mA with only 0.75 V nominal dropout voltage, enabling efficient regulation from 3.6 V to 16 V input supplies
- Low quiescent current design minimizes standby power consumption, extending battery life in always-on IoT and portable sensor applications
- SOT-223-3 package with exposed thermal pad provides superior heat dissipation compared to SOT-23, supporting full 250 mA load without external heatsink
Applications
The MCP1703T-2502E/DB is well-suited for embedded systems requiring a stable 2.5 V reference rail from higher unregulated supplies, including industrial sensors, battery-powered IoT devices, and microcontroller power trees. Its wide 3.6 V to 16 V input range accommodates 5 V USB, 9 V wall adapters, and 12 V industrial rails, while the low quiescent current preserves battery capacity in always-on sensor nodes. The SOT-223-3 footprint allows efficient thermal management at 250 mA continuous load current.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-223-3 |
| Factory Lead Time | 7Weeks |
| YTEOL | 8 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 1.1V |
| Dropout Voltage1-Nom | 0.75V |
| Input Voltage Absolute-Max | 18V |
| Input Voltage-Max | 16V |
| Input Voltage-Min | 3.6V |
| JESD-30 Code | R-PDSO-G4 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.093% |
| Load Regulation-Max | 0.0625% |
| 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 | 2.55V |
| Output Voltage1-Min | 2.45V |
| Output Voltage1-Nom | 2.5V |
| 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 | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Voltage Tolerance-Max | 2% |
| Package | SOT223 (3-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MCP1703T-2502E/DB:
Regulator, 2.5V, 1.1V Dropout, CMOS, PDSO4
Frequently Asked Questions
What dropout voltage does the MCP1703T-2502E/DB exhibit at full 250 mA output current?
At full 250 mA load, the MCP1703T-2502E/DB has a nominal dropout voltage of 0.75 V and a maximum of 1.1 V. This means the device maintains its regulated 2.5 V output from input voltages as low as 3.25 V to 3.6 V, making it suitable for designs powered from a single lithium-ion cell near its discharged voltage of 3.0 V to 3.3 V.
How does the low quiescent current of the MCP1703T-2502E/DB benefit battery-powered IoT designs?
The MCP1703T-2502E/DB is designed with very low quiescent current, meaning it draws minimal supply current when the load is idle or sleeping. In IoT sensor nodes that spend 99% of time in deep sleep with load currents below 1 mA, low Iq regulators can extend a 2000 mAh battery life by months compared to conventional LDOs drawing 1 mA to 5 mA quiescent current continuously.
What is the maximum input voltage the MCP1703T-2502E/DB can handle safely?
The MCP1703T-2502E/DB accepts up to 16 V continuous input voltage and an 18 V absolute maximum, enabling direct connection to 12 V industrial bus supplies, 9 V power adapters, or automotive sub-systems without external pre-regulation. This wide input range simplifies power architecture in multi-voltage industrial control panels requiring a stable 2.5 V analog reference.
Why is the SOT-223-3 package of the MCP1703T-2502E/DB preferred over SOT-23 in high-current regulator designs?
The SOT-223-3 package features a large exposed metallic tab on the underside, providing a thermal resistance to ambient (theta-JA) of approximately 50°C/W, significantly lower than the roughly 250°C/W typical of SOT-23. At 250 mA with a 10 V input-output differential, this improved thermal path prevents junction temperature from exceeding the 125°C maximum rating, eliminating the need for additional heatsinking in board-mounted regulator designs.
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