MCP1725-1802E/SN Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip MCP1725-1802E/SN is a fixed 1.8 V low-dropout linear regulator with 500 mA output in an 8-pin SOIC package. It operates from 2.3 V to 6 V input with a typical dropout voltage of only 210 mV, making it ideal for single-cell Li-ion powered systems. Output noise and fast transient response suit analog and mixed-signal supply rails.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MCP1725-1802E/SN Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.1171(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 1.8 V regulated output with 500 mA continuous current capability for low-voltage logic and RF supply
- Ultra-low 210 mV typical dropout voltage enabling regulation from near-depleted 2.3 V battery supplies
- Wide 2.3 V to 6 V input range accepting single Li-ion, 3 AA, and regulated 5 V sources
- Low output noise and fast transient response ideal for analog and mixed-signal circuit power rails
- 8-pin SOIC-8 package with 3.9 mm body width allowing compact, easy-to-solder PCB footprints
Applications
The MCP1725-1802E/SN supplies clean 1.8 V power to low-voltage microcontrollers, FPGAs, RF transceivers, and memory devices in battery-operated IoT nodes, wearables, and portable measurement instruments. Its 210 mV dropout allows it to continue regulating even as a single-cell Li-ion battery discharges toward 2.5 V, extending usable run time compared to higher-dropout alternatives. Low output noise makes it particularly effective as an analog reference supply for ADC and DAC circuits sensitive to power-rail ripple.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOIC-8 |
| 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 | 2.3V |
| 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 | 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 | 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 |
| Screening Level | TS 16949 |
| 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% |
| 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 | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MCP1725-1802E/SN:
Frequently Asked Questions
What is the dropout voltage of the MCP1725-1802E/SN, and how does this affect battery run time?
The MCP1725-1802E/SN has a typical dropout voltage of 210 mV and a maximum of 350 mV at full 500 mA load. This low dropout means the regulator continues supplying stable 1.8 V output until the battery voltage falls as low as 2.05 V (worst case), squeezing more usable energy from Li-ion cells compared to regulators with 500 mV or higher dropout.
What output current can the MCP1725-1802E/SN sustain, and which loads does it suit best?
The regulator delivers up to 500 mA continuous output current at 1.8 V, suitable for powering low-power MCUs drawing under 100 mA, short-range RF modules at 200 mA to 300 mA peak, and low-voltage SDRAM or NAND Flash at up to 500 mA burst. Thermal dissipation at maximum current must be considered given the small SOIC-8 package.
How does the input voltage range of the MCP1725-1802E/SN match common battery chemistries?
The 2.3 V to 6 V input range covers fully charged single-cell Li-ion at 4.2 V, three-cell NiMH at 3.6 V nominal, and USB 5 V bus power. This flexibility allows the same MCP1725-1802E/SN design to run from multiple supply sources, reducing design respins when changing battery chemistry or charger topology.
Is the MCP1725-1802E/SN appropriate as an analog power rail for noise-sensitive ADC circuits?
Yes. The MCP1725-1802E/SN provides low output voltage noise, typically under 30 µV RMS across the 10 Hz to 100 kHz band, and a high power-supply rejection ratio (PSRR) that attenuates input ripple before it reaches the output. These characteristics make it a practical LDO choice for supplying precision 12-bit to 16-bit ADC reference and analog front-end stages where rail noise directly degrades measurement accuracy.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.1171 | $0.12 |
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