MCP1727-1802E/SN Microchip Integrated Circuit (Small Outline Packages) In Stock
MCP1727-1802E/SN is a fixed 1.8 V, 1.5 A low-dropout (LDO) linear regulator with power-good output, featuring a typical dropout voltage of 0.33 V and an input range of 2.3 V to 6 V. It is housed in an SOIC-8 package and delivers stable 1.8 V rails for digital logic and memory. Available from Microchip with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MCP1727-1802E/SN Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.8700(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP1727-1802E/SN?
- 1.5 A output current capability with only 0.33 V typical dropout supports powering large FPGAs, processors, and DDR memory from a 2.3 V to 6 V input rail
- Power-good (PG) output flag signals valid output voltage to the system, enabling sequenced power-up of multi-rail circuits without external supervisory ICs
- Fixed 1.8 V output eliminates the 2-resistor feedback network required by adjustable LDOs, reducing component count and output-voltage error
- Low dropout of 0.33 V typical and 6 V absolute-maximum input allows operation from USB 5 V, Li-ion 3.7 V, or 3.3 V pre-regulated rails
What is MCP1727-1802E/SN used for?
MCP1727-1802E/SN is used to generate the 1.8 V core supply for microcontrollers, FPGAs, and DDR SDRAM chips in embedded systems powered from USB, Li-ion batteries, or 3.3 V regulated bus. Its 1.5 A output handles the peak current demands of ARM Cortex-M and Cortex-A devices during burst processing, while the power-good flag supports orderly power sequencing in multi-rail systems. The SOIC-8 package and low external capacitor requirement make it a straightforward drop-in for portable instruments, industrial I/O modules, and single-board computers.
What are the specifications of MCP1727-1802E/SN?
| Pbfree Code | Yes |
| Manufacturer Package Code | SOIC-8 |
| Factory Lead Time | 6Weeks |
| YTEOL | 9 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.55V |
| Dropout Voltage1-Nom | 0.33V |
| Input Voltage Absolute-Max | 6.5V |
| Input Voltage-Max | 6V |
| Input Voltage-Min | 2.3V |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.010656% |
| 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 | 1.5A |
| Output Voltage1-Max | 1.845V |
| Output Voltage1-Min | 1.755V |
| Output Voltage1-Nom | 1.8V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| 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 | 1.27mm |
| Terminal Position | DUAL |
| Voltage Tolerance-Max | 2.5% |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Mainland China, Thailand |
Where can I find the MCP1727-1802E/SN datasheet?
MCP1727-1802E/SN Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP1727-1802E/SN?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
Can MCP1727-1802E/SN be powered from a single-cell Li-ion battery (3.7 V nominal) to supply a 1.8 V MCU core rail?
Yes. A Li-ion cell delivers 3.0 V to 4.2 V across its discharge curve, which exceeds the minimum 2.3 V input and the 1.8 V output plus 0.33 V typical dropout (2.13 V). At 3.0 V end-of-discharge, the 0.87 V headroom ensures MCP1727-1802E/SN maintains the 1.8 V output without dropout, allowing the system to use nearly the full battery capacity before the regulator falls out of regulation and the system can perform a safe-shutdown sequence.
How does the power-good output of MCP1727-1802E/SN support multi-rail power sequencing in an FPGA design?
MCP1727-1802E/SN's active-high power-good (PG) pin asserts when the 1.8 V output rises above approximately 92% of its nominal value. In an FPGA design that requires the 1.8 V core rail to stabilize before the 3.3 V I/O rail is enabled, the PG pin drives the enable input of the 3.3 V regulator directly, ensuring a minimum of 1 ms to 5 ms between core and I/O power-up without a dedicated supervisor IC or MCU GPIO sequencing logic.
What output capacitor is required for MCP1727-1802E/SN, and how does that compare to older LDO designs with large capacitor requirements?
MCP1727-1802E/SN is stable with a 10 µF ceramic output capacitor, which is smaller and cheaper than the 22 µF to 100 µF electrolytic capacitors required by older PNP-based LDOs. The ceramic cap has lower ESR and a smaller footprint (0402 or 0603 size), reducing the total LDO solution area on a PCB by up to 50% compared to legacy regulators that needed electrolytic capacitors with a specific ESR window of 0.1 to 1 ohm for stability.
How does MCP1727-1802E/SN handle a 5 V USB input powering a 1.8 V FPGA core with a 1.2 A peak current demand?
With a 5 V USB input and 1.8 V output, MCP1727-1802E/SN dissipates (5 V - 1.8 V) x 1.2 A = 3.84 W as heat. The SOIC-8 package has a thermal resistance of approximately 120°C/W junction-to-ambient, which would raise junction temperature by 460°C at full load without heat sinking — so copper pour or a small heat spreader keeping theta_JA below 30°C/W is required. For sustained 1.2 A loads from USB 5 V, placing the device on a 1 cm x 1 cm copper island connected to inner ground planes reduces the effective junction-to-ambient to under 50°C/W, keeping Tj below 125°C at 25°C ambient.
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