MCP1755S-3302E/DB Microchip Power Supply (SOT223 (3-Pin)) In Stock
The MCP1755S-3302E/DB is a fixed 3.3 V LDO linear voltage regulator delivering up to 300 mA output with only 300 mV typical dropout, accepting 3.6 V to 16 V input, in a SOT-223-3 package for compact, low-noise power supply designs.
- Manufacturer
- Microchip
- Package
- SOT223 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP1755S-3302E/DB Datasheet PDF
- Category
- Power Supply
- Price
- From $0.6500(MOQ 5)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 3.3 V output with ±0.5% initial accuracy and 300 mV typical dropout voltage, allowing efficient regulation from 3.6 V input rails with minimal headroom
- 300 mA output current capability in a thermally enhanced SOT-223-3 package, supporting microcontrollers, sensors, and low-power RF modules without an external heatsink
- Wide 3.6 V to 16 V input range accommodating unregulated wall adapters, 9 V batteries, and 12 V automotive or industrial supply rails in a single device
- Low quiescent current and RoHS-compliant lead-free construction, making it suitable for always-on IoT nodes and green-energy-rated consumer products
Applications
The MCP1755S-3302E/DB is used to derive a stable 3.3 V rail from higher unregulated or loosely regulated supply sources in embedded systems, wireless sensor nodes, and point-of-load regulation on industrial I/O cards. Its 300 mA rating and SOT-223-3 footprint also make it a practical post-regulator following a switching converter to suppress ripple and provide a low-noise 3.3 V supply for ADCs, RF transceivers, and precision analog front-ends.
Specifications
| Manufacturer Package Code | SOT-223-3 |
| Factory Lead Time | 7Weeks |
| YTEOL | 14 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.5V |
| Dropout Voltage1-Nom | 0.3V |
| Input Voltage Absolute-Max | 17.6V |
| Input Voltage-Max | 16V |
| Input Voltage-Min | 3.6V |
| JESD-30 Code | R-PDSO-G3 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.02046% |
| Load Regulation-Max | 0.0165% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 150°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.3A |
| Output Voltage1-Max | 3.366V |
| Output Voltage1-Min | 3.234V |
| 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 | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Screening Level | AEC-Q100 |
| 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
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the dropout voltage of MCP1755S-3302E/DB, and what minimum input voltage is needed to maintain a regulated 3.3 V output?
The MCP1755S-3302E/DB has a typical dropout voltage of 300 mV, with a maximum of 500 mV. To guarantee a regulated 3.3 V output under all conditions, the input must stay at or above 3.8 V. This makes it compatible with the tail end of a 3.6 V lithium battery and with 5 V bus supplies found on Arduino-class development boards.
How much output current can MCP1755S-3302E/DB supply continuously, and is the SOT-223 package sufficient for full-load operation?
The MCP1755S-3302E/DB provides up to 300 mA of continuous output current. The SOT-223-3 package has a thermal pad that allows heat dissipation into the PCB copper. At the maximum 16 V input with 3.3 V output and 300 mA load, power dissipation is approximately 3.8 W, so a copper pour of at least 4 cm² is recommended to keep junction temperature below +125°C.
Can MCP1755S-3302E/DB be powered directly from a 12 V wall adapter or car accessory socket?
Yes. The MCP1755S-3302E/DB accepts input voltages up to 16 V continuously, with an absolute maximum of 17.6 V. A 12 V wall adapter or 12 V automotive accessory rail—which can rise to 14.4 V during charging—falls within its operating range, allowing the device to directly supply a regulated 3.3 V to microcontrollers or sensors in vehicle accessories without an intermediate pre-regulator.
How does MCP1755S-3302E/DB compare to a switching regulator when used as a post-filter behind a 5 V switcher for ADC supply noise?
When used as a linear post-regulator after a 5 V switching converter, the MCP1755S-3302E/DB rejects high-frequency switching ripple typically above 50 dB PSRR at low frequencies, producing a clean 3.3 V output with less than 50 µVRMS noise. A switching-only approach requires additional LC filtering of 10 µH or more to achieve comparable noise performance, whereas the LDO achieves this with only two small bypass capacitors.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 5+ | $0.9100 | $4.55 |
| 25+ | $0.7600 | $19.00 |
| 100+ | $0.6900 | $69.00 |
| 1000+ | $0.6500 | $650.00 |
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