MCP1802T-1802I/OT Microchip Integrated Circuit (SOT23 (5-Pin)) In Stock
Microchip MCP1802T-1802I/OT is a 300 mA fixed 1.8V LDO linear regulator with high PSRR, 0.43V typical dropout voltage, 2V to 10V input range, and enable control in a 5-pin SOT-23 package. In stock worldwide with fast shipping.
- Manufacturer
- Microchip
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- NOT RECOMMENDED
- Datasheet
- MCP1802T-1802I/OT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.1267(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP1802T-1802I/OT?
- 300 mA output current with only 0.43V typical dropout voltage enabling efficient 1.8V regulation from a 2V to 3.3V input rail
- High PSRR (power supply rejection ratio) attenuating input ripple and switching noise for clean 1.8V rails feeding sensitive analog circuits
- Enable pin allowing host MCU to power-gate the 1.8V supply for sub-µA shutdown current in sleep-mode power management
- Fixed 1.8V output in a compact SOT-23-5 package occupying under 5 mm² of PCB footprint
What is MCP1802T-1802I/OT used for?
The MCP1802T-1802I/OT is used in microcontroller 1.8V core supplies, Wi-Fi module power rails, and LPDDR memory voltage domains where a clean, low-dropout 1.8V is derived from a Li-ion cell or 3.3V bus. Its high PSRR makes it suitable for RF and precision analog subsystems that are sensitive to power supply noise. Portable IoT sensors use the enable pin for fine-grained power gating, extending battery life by shutting down the 1.8V domain during deep-sleep intervals.
What are the specifications of MCP1802T-1802I/OT?
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-23-5 |
| Factory Lead Time | 16Weeks |
| YTEOL | 3 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.53V |
| Dropout Voltage1-Nom | 0.43V |
| Input Voltage Absolute-Max | 12V |
| Input Voltage-Max | 10V |
| Input Voltage-Min | 2V |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.02592% |
| Load Regulation-Max | 0.1% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current1-Max | 0.3A |
| Output Voltage1-Max | 1.836V |
| Output Voltage1-Min | 1.764V |
| Output Voltage1-Nom | 1.8V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| 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 | 0.95mm |
| Terminal Position | DUAL |
| Voltage Tolerance-Max | 2% |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Japan |
Where can I find the MCP1802T-1802I/OT datasheet?
MCP1802T-1802I/OT Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP1802T-1802I/OT?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the dropout voltage of MCP1802T-1802I/OT at 300 mA, and why does that matter for Li-ion battery applications?
At full 300 mA load, MCP1802T-1802I/OT has a typical dropout voltage of 0.43V and a maximum of 0.53V. A Li-ion cell discharges down to 3.0V, leaving 1.17V of headroom above the 1.8V output — more than the 0.53V maximum dropout — so the regulator maintains regulation through nearly the entire battery discharge cycle.
How does MCP1802T-1802I/OT handle power-sequencing in a multi-rail embedded system?
The active-high enable pin lets an upstream MCU or PMIC assert the 1.8V rail after the 3.3V domain has stabilized, enforcing correct power-on sequence. Shutdown current drops to sub-1 µA, making the enable pin ideal for duty-cycled IoT designs that need 1.8V active for less than 1% of operating time.
For a Wi-Fi module supply requiring low noise, what PSRR specification does MCP1802T-1802I/OT achieve?
MCP1802T-1802I/OT delivers high PSRR exceeding 60 dB at 1 kHz, attenuating switching converter ripple on the input rail before it reaches sensitive RF circuitry. This eliminates the need for additional LC post-filter stages, saving at least 2 passive components and reducing BOM cost in compact Wi-Fi module designs.
When is MCP1802T-1802I/OT a more cost-effective alternative to adjustable LDOs for fixed 1.8V designs?
MCP1802T-1802I/OT eliminates the 2 external resistors required by an adjustable LDO to set the 1.8V output, reducing total component count by 3 parts including the resistors and a feedback bypass capacitor. In production volumes of 10000+ units, a fixed-output 5-pin SOT-23 solution reduces assembly time and BOM cost compared to an adjustable 5-pin part requiring two 1% tolerance resistors.
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| Qty. | Unit Price | Ext. Price |
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| 100+ | $0.1310 | $13.10 |
| 250+ | $0.1288 | $32.20 |
| 500+ | $0.1267 | $63.35 |
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