MCP1825S-3302E/AB Microchip Integrated Circuit (Other) In Stock
Microchip MCP1825S-3302E/AB is a fixed 3.3 V LDO linear regulator delivering up to 500 mA output current with only 0.35 V maximum dropout voltage and 6 V maximum input, housed in a TO-220-3 package for low-noise power supply designs.
- Manufacturer
- Microchip
- Package
- Other
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP1825S-3302E/AB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.6720(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 3.3 V output with up to 500 mA output current for powering microcontrollers and logic ICs
- Low 0.21 V nominal / 0.35 V maximum dropout voltage enabling efficient use of marginal supply rails
- Wide input voltage range from 3.7 V to 6 V (6.5 V absolute maximum) for compatibility with 5 V systems
- TO-220-3 package with through-hole mounting and optional heatsink attachment for higher dissipation designs
- Pb-free, RoHS-compliant construction with 8-week factory lead time
Applications
MCP1825S-3302E/AB is used to generate a stable 3.3 V supply rail from 5 V or unregulated sources in microcontroller boards, sensor modules, and embedded control systems. Its low dropout of 0.35 V allows it to maintain regulation when powered from a 4.2 V Li-ion cell near end of discharge, extending usable battery capacity. The TO-220-3 package is commonly used in prototyping, industrial control boards, and test equipment where the leaded package simplifies assembly and heat management.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | TO-220-3 |
| Factory Lead Time | 8Weeks |
| YTEOL | 9 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.35V |
| Dropout Voltage1-Nom | 0.21V |
| Input Voltage Absolute-Max | 6.5V |
| Input Voltage-Max | 6V |
| Input Voltage-Min | 3.7325V |
| JESD-30 Code | R-PSFM-T3 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.0119724% |
| Load Regulation-Max | 0.033% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.5A |
| Output Voltage1-Max | 3.3825V |
| Output Voltage1-Min | 3.2175V |
| Output Voltage1-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SIP3,.1TB |
| Package Shape | RECTANGULAR |
| Package Style | FLANGE MOUNT |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | NO |
| Technology | CMOS |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | SINGLE |
| Voltage Tolerance-Max | 2.5% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Mainland China |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
Can MCP1825S-3302E/AB regulate 3.3 V from a 4.2 V Li-ion cell throughout its discharge cycle?
MCP1825S-3302E/AB requires a minimum 3.7 V input to maintain 3.3 V output, so it stays in regulation until the Li-ion cell drops below approximately 3.7 V. With a 0.35 V maximum dropout and a 4.2 V fully charged cell, it provides clean 3.3 V regulation through most of the usable battery discharge range, maximizing the runtime of battery-powered MCU systems.
How much power does MCP1825S-3302E/AB dissipate when supplying 500 mA from a 5 V rail?
At 500 mA from a 5 V input to a 3.3 V output, the MCP1825S-3302E/AB dissipates approximately 850 mW (P = (5 V - 3.3 V) × 0.5 A). The TO-220-3 package can handle this with adequate airflow or a small heatsink; without one, junction temperature rise may require derating the output current to stay within the device's thermal limits.
What are the advantages of the TO-220-3 through-hole package for prototyping and low-volume production compared to SOT-223?
The TO-220-3 package allows hand-soldering directly into a through-hole PCB or breadboard without SMT reflow equipment, which speeds up prototyping and simplifies low-volume assembly. It also supports clip-on or bolt-on heatsinks with a standard mounting tab, making it easier to manage the approximately 0.35 V × 500 mA dropout heat in thermally constrained enclosures.
When should a designer choose MCP1825S-3302E/AB over a switching regulator for generating 3.3 V in a noise-sensitive analog design?
MCP1825S-3302E/AB is preferred over a switching regulator when low output noise is critical, such as in analog sensor front ends, ADC reference supplies, or audio circuits, because linear LDOs eliminate the switching harmonics that SMPS designs inject into the supply rail. The tradeoff is lower efficiency, particularly when the 5 V to 3.3 V dropout exceeds 1.7 V at 500 mA, but the clean rail quality justifies the choice in precision measurement applications.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.1100 | $1.11 |
| 25+ | $0.6720 | $16.80 |
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