MCP1824ST-0802E/DB Microchip Integrated Circuit (SOT223 (3-Pin)) In Stock
The MCP1824ST-0802E/DB is a fixed 0.8 V output, low-dropout linear voltage regulator from Microchip with 300 mA output current capacity. It features a 200 mV typical dropout voltage at full load and operates from 2.1 V to 6 V input in a compact SOT-223-3 package. Suitable for powering low-voltage core rails in portable and battery-powered electronics.
- Manufacturer
- Microchip
- Package
- SOT223 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP1824ST-0802E/DB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3650(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 0.8 V output voltage enabling direct core power supply for low-voltage FPGAs, DSPs, and sub-1 V logic ICs
- 300 mA output current with 200 mV typical dropout voltage minimizing headroom loss from battery or bus supplies
- 2.1 V to 6 V input range compatible with Li-ion, 3.3 V rail, and 5 V USB power sources
- SOT-223-3 package with exposed tab for improved thermal dissipation in compact SMD designs
- Low quiescent current for high efficiency in light-load and standby operating modes of battery-powered devices
Applications
The MCP1824ST-0802E/DB is designed for powering sub-1 V core voltage rails of FPGAs, DSPs, and low-voltage application processors from a 3.3 V or single-cell Li-ion source. Its 200 mV typical dropout at 300 mA load allows it to supply the core rail from a depleted Li-ion cell at 2.5 V while maintaining the required 0.8 V output, extending battery run-time. It is also used in multi-rail power sequencing designs for FPGA and SoC boards where the core voltage must be established before I/O rails to prevent latch-up.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-223-3 |
| Factory Lead Time | 19Weeks |
| 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 | 0.005304% |
| Load Regulation-Max | 0.008% |
| 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 | 0.82V |
| Output Voltage1-Min | 0.78V |
| Output Voltage1-Nom | 0.8V |
| 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-0802E/DB:
Frequently Asked Questions
How does MCP1824ST-0802E/DB's 200 mV dropout enable power from a nearly depleted Li-ion cell at 2.5 V?
With a maximum dropout voltage of 320 mV at 300 mA and typical dropout of 200 mV, MCP1824ST-0802E/DB maintains a regulated 0.8 V output as long as the input stays above approximately 1.12 V (output plus dropout). A Li-ion cell at end-of-discharge voltage of 2.5 V provides more than 1.7 V of headroom above the minimum input threshold of 2.1 V, sustaining full 300 mA output throughout the cell's usable discharge range.
For an FPGA core power rail requiring 0.8 V at 200 mA, how does MCP1824ST-0802E/DB's thermal performance in SOT-223-3 affect PCB design?
In SOT-223-3, the exposed tab connects to the output pin and provides a thermal path to the PCB copper pour. At 200 mA from a 3.3 V input, power dissipation is (3.3 - 0.8) x 0.2 = 500 mW. With a typical SOT-223 junction-to-board thermal resistance of 25°C/W and a copper pour, junction temperature rise is approximately 12.5°C above ambient, keeping the device below 70°C at 25°C ambient for reliable long-term FPGA core power delivery.
Can MCP1824ST-0802E/DB power a 0.8 V core from a 5 V USB supply safely?
The MCP1824ST-0802E/DB accepts inputs up to 6 V absolute maximum, so a 5 V USB supply is within the 2.1 V to 6 V operating range. At 5 V input and 0.8 V output at 300 mA, power dissipation is (5.0 - 0.8) x 0.3 = 1.26 W. The SOT-223-3 package can dissipate this safely with a 1 cm² copper pad, keeping junction temperature below 125°C at 25°C ambient; for higher ambient temperatures above 50°C, increasing copper area to 2 cm² is recommended.
How does the fixed 0.8 V output of MCP1824ST-0802E/DB compare to an adjustable LDO for multi-rail FPGA power designs?
A fixed-output MCP1824ST-0802E/DB simplifies the BOM by eliminating external resistor dividers required by adjustable LDOs such as MCP1824T-ADJ. Fixed-voltage accuracy is typically tighter (±2% versus ±3% including resistor tolerance), directly benefiting FPGA core voltage accuracy-sensitive designs. For boards requiring only 0.8 V and 1.8 V rails, two fixed-voltage MCP1824 variants replace two adjustable LDOs plus four precision resistors, saving cost and PCB area.
What output capacitor is recommended for stable operation of MCP1824ST-0802E/DB in a pulsed-load FPGA core supply?
Microchip recommends a minimum 1 µF ceramic output capacitor for stability; for pulsed FPGA loads with current steps above 100 mA in under 1 µs, a 10 µF ceramic capacitor reduces output voltage droop to below 50 mV during load transients. Place the capacitor within 5 mm of the LDO output pin on a low-impedance copper pour to minimize ESR-induced voltage spikes. Avoid tantalum capacitors with ESR above 300 mOhm, which can cause oscillation at light loads.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.6400 | $0.64 |
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