MCP1825ST-1802E/DB Microchip Integrated Circuit (SOT223 (3-Pin)) In Stock
Microchip MCP1825ST-1802E/DB is a fixed 1.8 V, 500 mA CMOS LDO regulator with 0.21 V typical dropout voltage and 2.1 V to 6 V input range, packaged in SOT-223 for stable low-voltage power supply design.
- Manufacturer
- Microchip
- Package
- SOT223 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP1825ST-1802E/DB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.4593(MOQ 25)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 500 mA output current with 0.21 V typical dropout voltage enables efficient 1.8 V regulation from 2-cell battery or 3.3 V / 5 V supply rails
- Fixed 1.8 V CMOS LDO architecture provides clean, stable output for low-voltage microcontrollers and digital peripherals
- SOT-223 package with exposed thermal pad allows up to 500 mA continuous output with good thermal dissipation on standard PCBs
Applications
The MCP1825ST-1802E/DB is used to power 1.8 V microcontrollers, FPGAs, memory devices, and wireless transceivers in embedded systems operating from 3.3 V or 5 V input rails. Its low 0.21 V typical dropout and 500 mA current capability make it a reliable LDO choice for IoT nodes, portable instruments, and industrial sensor modules.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-223-3 |
| Factory Lead Time | 11Weeks |
| 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 | 2.1V |
| JESD-30 Code | R-PSSO-G3 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.0109584% |
| Load Regulation-Max | 0.018% |
| 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 | 1.845V |
| Output Voltage1-Min | 1.755V |
| Output Voltage1-Nom | 1.8V |
| 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 | SINGLE |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Voltage Tolerance-Max | 2.5% |
| 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 | Taiwan, Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MCP1825ST-1802E/DB:
Microchip Technology Inc 500mA LOW VOLTAGE, LOW IQ LDO
Frequently Asked Questions
What is the dropout voltage of the MCP1825ST-1802E/DB at full load?
The MCP1825ST-1802E/DB has a typical dropout voltage of 0.21 V and a maximum of 0.35 V at full 500 mA load. This low dropout allows the regulator to maintain a regulated 1.8 V output even when the input supply falls as low as 2.1 V, extending battery life in portable designs.
Can the MCP1825ST-1802E/DB power a 1.8 V microcontroller directly from a 3.3 V rail?
Yes, the MCP1825ST-1802E/DB accepts input voltages from 2.1 V to 6 V, making it fully compatible with a 3.3 V input rail. It delivers up to 500 mA at a stable 1.8 V output, which is sufficient to power most 1.8 V microcontrollers, memory chips, and low-power digital ICs without additional power stages.
How does the SOT-223 package help with thermal management at 500 mA output?
The SOT-223 package of the MCP1825ST-1802E/DB includes an exposed metal tab on the package body that solders directly to a copper pour on the PCB, improving thermal conductivity. This allows the regulator to sustain 500 mA continuous output current without exceeding its thermal limits on standard FR4 boards without external heatsinks.
Is the MCP1825ST-1802E/DB suitable for always-on IoT sensor nodes running from a single-cell Li-Ion battery?
The MCP1825ST-1802E/DB can operate from inputs as low as 2.1 V, which is near the minimum usable voltage of a single-cell Li-Ion battery (typically 2.5 V to 4.2 V). Its low quiescent current and 1.8 V output at 500 mA make it a practical choice for IoT sensor nodes that need to stay active across the full battery discharge cycle.
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