MCP1824ST-1802E/DB Microchip Integrated Circuit (SOT223 (3-Pin)) In Stock
MCP1824ST-1802E/DB is a fixed 1.8 V low-dropout linear regulator from Microchip capable of sourcing up to 300 mA from a 2.1 V to 6 V input supply. Dropout voltage of only 200 mV typical (320 mV max) ensures reliable regulation from single-cell Li-Ion or LDO-stacked rails. Available in space-efficient SOT-223-3 package for battery-powered and portable electronics designs.
- Manufacturer
- Microchip
- Package
- SOT223 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP1824ST-1802E/DB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.1157(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 1.8 V output with 200 mV typical dropout voltage, enabling stable regulation from near-depleted Li-Ion cells
- 300 mA output current capability from 2.1 V to 6 V input range covers a wide variety of portable power architectures
- SOT-223-3 package with exposed thermal pad supports efficient heat dissipation in compact board layouts
Applications
The MCP1824ST-1802E/DB is ideal for powering 1.8 V digital peripherals, microcontrollers, and memory devices in battery-powered handheld products, IoT sensor nodes, and wireless modules. Its low dropout characteristic makes it particularly effective in single-cell Li-Ion powered applications where input voltage can drop to 2.5 V near end-of-discharge, and the compact SOT-223 package fits tight PCB footprints.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-223-3 |
| Factory Lead Time | 7Weeks |
| YTEOL | 9 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.32V |
| Dropout Voltage1-Nom | 0.2V |
| Input Voltage Absolute-Max | 6.5V |
| Input Voltage-Max | 6V |
| Input Voltage-Min | 2.1V |
| JESD-30 Code | R-PDSO-G3 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.011934% |
| 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 | 0.3A |
| 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 |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Screening Level | TS 16949 |
| 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 | 2.5% |
| 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 MCP1824ST-1802E/DB:
Frequently Asked Questions
How does the dropout voltage of MCP1824ST-1802E/DB affect its usability with a Li-Ion battery near end-of-discharge?
The MCP1824ST-1802E/DB has a maximum dropout voltage of 320 mV, so the 1.8 V output remains regulated down to an input of approximately 2.12 V. Since Li-Ion cells discharge to roughly 2.7-3.0 V at end-of-life, this regulator maintains a stable 1.8 V rail throughout the battery's usable capacity, extending effective run time in IoT sensors and wearable devices.
What is the maximum output current the MCP1824ST-1802E/DB can deliver, and what thermal constraints apply?
The MCP1824ST-1802E/DB sources up to 300 mA continuously. In the SOT-223-3 package, the exposed tab lowers thermal resistance to approximately 60°C/W junction-to-board, limiting safe dissipation at 25°C ambient to roughly 1 W before derating. Designs drawing close to 300 mA with a 6 V input (1.26 W dissipation) require careful PCB copper pour or a heatsink tab connection.
Which microcontroller and peripheral combinations are compatible with the fixed 1.8 V output of MCP1824ST-1802E/DB?
The fixed 1.8 V output directly powers 1.8 V I/O microcontrollers such as many ARM Cortex-M0+ and RISC-V parts, alongside LPDDR2 memories, BLE SoCs, and NOR Flash devices rated at 1.7 V to 1.95 V. Input supply range from 2.1 V to 6 V covers 3.3 V regulated rails, 5 V USB, and 3.7 V Li-Ion cells, making it versatile across a wide range of embedded power trees.
How does MCP1824ST-1802E/DB compare to adjustable LDOs for fixed-voltage designs?
A fixed-output device like the MCP1824ST-1802E/DB eliminates the two external resistors required by adjustable LDOs, reducing BOM count and the risk of feedback network errors that could produce an incorrect output voltage. The fixed trim also achieves tighter initial accuracy than resistor-divider tolerances allow, typically within ±2% of 1.8 V, which is important for logic families with narrow 1.7 V to 1.95 V supply windows.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.6400 | $0.64 |
| 25+ | $0.5400 | $13.50 |
| 100+ | $0.4900 | $49.00 |
| 500+ | $0.1196 | $59.80 |
| 1000+ | $0.1177 | $117.70 |
| 3000+ | $0.1157 | $347.10 |
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