MCP1703T-3302E/CB Microchip Integrated Circuit (SOT23 (3-Pin)) In Stock
The MCP1703T-3302E/CB is a 250mA fixed 3.3V LDO linear regulator from Microchip in a compact SOT-23 package. It operates from inputs up to 16V with only 2µA quiescent current, ideal for battery-powered designs. The device features low dropout of 525mV typical and is RoHS compliant.
- Manufacturer
- Microchip
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP1703T-3302E/CB Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Ultra-low 2µA quiescent current extends battery life in portable and IoT applications
- Wide input voltage range up to 16V accommodates unregulated supplies and automotive 12V rails
- Fixed 3.3V output at 250mA with 525mV typical dropout voltage for efficient linear regulation
- Compact SOT-23 3-pin package minimizes PCB footprint in space-constrained designs
Applications
The MCP1703T-3302E/CB is designed for battery-operated portable electronics, IoT sensor nodes, and low-power wireless modules where quiescent current must be minimized. Its wide 16V input range also makes it suitable for industrial equipment powered from 12V rails or unregulated wall adapters. The fixed 3.3V output directly supplies microcontrollers, RF transceivers, and logic circuits without external resistors.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-23A-3 |
| Reach Compliance Code | Compliant |
| Factory Lead Time | 6Weeks |
| YTEOL | 8 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.725V |
| Dropout Voltage1-Nom | 0.525V |
| Input Voltage Absolute-Max | 18V |
| Input Voltage-Max | 16V |
| Input Voltage-Min | 4.025V |
| JESD-30 Code | R-PDSO-G3 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.1185525% |
| Load Regulation-Max | 0.0825% |
| 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 | 3.366V |
| Output Voltage1-Min | 3.234V |
| Output Voltage1-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TO-236 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| 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 | 0.95mm |
| Terminal Position | DUAL |
| Voltage Tolerance-Max | 2% |
| Package | SOT23 (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 | Mainland China, Taiwan, Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MCP1703T-3302E/CB:
Regulator, 3.3V, 0.725V Dropout, CMOS, PDSO3
Frequently Asked Questions
What is the quiescent current of the MCP1703T-3302E/CB and why does it matter for battery life?
The MCP1703T-3302E/CB draws only 2µA quiescent current, which is critical for battery-operated devices that spend most of their time in standby or sleep mode. In a coin cell or small lithium pack application, this ultra-low Iq can extend battery runtime from weeks to months compared with regulators drawing hundreds of microamps.
Up to what input voltage can the MCP1703T-3302E/CB operate, and which supply rails does that cover?
The MCP1703T-3302E/CB supports input voltages up to 16V, with an absolute maximum of 18V. This range covers regulated 5V and 12V rails, unregulated wall-adapter outputs, and automotive accessory supplies, allowing the same regulator to be reused across multiple platform designs without component changes.
How does the MCP1703T-3302E/CB dropout voltage affect its usability near the end of a battery discharge cycle?
The dropout voltage is 525mV typical (725mV maximum), meaning the input must stay at least 725mV above 3.3V, i.e., above approximately 4.025V, to maintain regulation. In a single Li-Ion application, the regulator drops out before the cell reaches its cutoff voltage, so designers must account for this margin in their battery state-of-charge budget.
Is the MCP1703T-3302E/CB suitable for powering an ESP32 or similar 3.3V Wi-Fi module from a 5V USB supply?
Yes. With a 5V input and a 3.3V fixed output, the input-to-output differential is 1.7V, comfortably above the 725mV maximum dropout. The 250mA output current covers the typical active current of an ESP32 module, and the SOT-23 package keeps the power solution footprint under 5 mm².
Related Guides
MCP79410 I2C RTCC Design Guide: Crystal, Battery Backup, and Firmware
Complete application note for the Microchip MCP79410 I2C real-time clock: crystal selection, battery backup circuit, I2C firmware, alarm configuration, and calibration.
Jun 17, 2026
ST3232BTR RS-232 Transceiver Design Guide: Application Note
Complete application note for the ST3232BTR RS-232 transceiver: charge-pump capacitor selection, PCB layout, ESD protection, and recommended design solutions for 3.3 V and 5 V systems.
Jun 17, 2026
1.5KE Series TVS Diode EOL Cross-Reference and Equivalent Replacements
Cross-reference guide for EOL 1.5KE TVS diodes (1.5KE15A, 1.5KE36A, 1.5KE200A, 1.5KE100CA). Match standoff voltage, polarity, and 1500W rating to find active equivalents.
Jun 16, 2026
Microchip Serial EEPROM NRND Cross-Reference Guide: 25LC080, 25AA640, 25AA080, 24C08 to Active Equivalents
Cross-reference guide for Microchip NRND serial EEPROMs: 25LC080, 25AA640, 25AA080A (SPI) and 24C08B (I2C) to active A/B-revision drop-in replacements.
Jun 16, 2026
Why Buy from FindMyChip
About Microchip
Microchip is a leading electronic component manufacturer. FindMyChip sources Microchip ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
More from Microchip
PIC16LF88-I/SS
Small Outline Packages
Integrated Circuit
25AA02E48-I/SN
Small Outline Packages
Integrated Circuit
PIC18F1220-I/SO
Small Outline Packages
Integrated Circuit
MIC5319-1.8YD5-TR
SOT23 (5-Pin)
Integrated Circuit
dsPIC33FJ256GP710A-I/PT
Quad Flat Packages
Integrated Circuit
BM70BLES1FC2-0B03AA
Other
Integrated Circuit
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”