MCP1703T3302ECB Microchip Integrated Circuit (SOT23 (3-Pin)) In Stock
MCP1703T3302ECB is a fixed 3.3 V LDO linear voltage regulator by Microchip capable of sourcing up to 250 mA in a compact SOT-23 package. Key specs: up to 16 V input, low quiescent current, and -40°C to 125°C operating range. Available from stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP1703T3302ECB Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 3.3 V output LDO regulator sourcing up to 250 mA with low dropout for battery and USB-powered designs
- Wide 2.7 V to 16 V input range supporting both single-cell Li-Ion and regulated 12 V bus inputs
- Ultra-low quiescent current in tiny SOT-23 footprint for compact, space-constrained IoT and wearable applications
- Extended -40°C to 125°C operating range meeting industrial and automotive grade thermal requirements
Applications
The MCP1703T3302ECB delivers a stable 3.3 V rail from a wide range of unregulated inputs in IoT nodes, portable instruments, and battery-powered sensors where board space is limited. Its 250 mA output current and 16 V input tolerance make it suitable for regulating 5 V USB or 12 V adapter rails down to logic-level supply for microcontrollers and wireless modules. The SOT-23 package and -40°C to 125°C rating are well matched to industrial monitoring devices and automotive accessory boards.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MCP1703T3302ECB:
Frequently Asked Questions
What is the maximum input voltage and output current for the MCP1703T3302ECB?
The MCP1703T3302ECB accepts input voltages up to 16 V and delivers a fixed 3.3 V output at up to 250 mA continuous load current. This makes it suitable for regulating 12 V industrial rails or 5 V USB bus down to 3.3 V for microcontroller and sensor supply in embedded designs.
For a compact wearable device running from a 3.7 V Li-Ion cell, how does the MCP1703T3302ECB's dropout performance matter?
A Li-Ion cell discharges from 4.2 V down to about 3.0 V. The MCP1703T3302ECB's low dropout voltage at 250 mA ensures 3.3 V regulation is maintained until the cell approaches its cutoff, extending usable runtime by tens of minutes compared to regulators with higher 500 mV to 1 V dropout thresholds. The SOT-23 package occupies less than 2.9 mm x 1.6 mm of PCB area.
When is MCP1703T3302ECB preferred over a switching regulator for a 5 V to 3.3 V conversion in a noise-sensitive sensor module?
In sensor modules where switching noise would corrupt high-resolution ADC measurements at 12-bit or 16-bit precision, the MCP1703T3302ECB's LDO topology provides a clean 3.3 V output free of switching ripple. At 250 mA load and a 5 V input, the 1.7 V dropout dissipates only 425 mW, acceptable in low-current sensor nodes operating across -40°C to 125°C without heatsinking.
Related Guides
1206 100 uF MLCC Design Guide for Compact Bulk Decoupling
Design guidance for applying CL31A107MQHNNNE and related 1206 MLCCs in compact bulk decoupling networks.
Jul 3, 2026
0402 10 nF MLCC Design Guide for High-Speed Decoupling
Practical design guidance for using CL05B103KB5NNNC and related 0402 MLCCs in high-speed decoupling networks.
Jul 3, 2026
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 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.
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.”