MCP1801T-1802I/OT Microchip Integrated Circuit (SOT23 (5-Pin)) In Stock
Microchip MCP1801T-1802I/OT is a 150 mA fixed 1.8 V LDO linear regulator with 430 mV typical dropout voltage and 10 V maximum input in a SOT-23-5 package. Delivers stable 1.8 V output from 2 V to 10 V input with high PSRR for noise-sensitive RF and microcontroller supply rails. Available from stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- MCP1801T-1802I/OT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.1521(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 150 mA output current at fixed 1.8 V with only 430 mV typical dropout enabling single-cell LiPo operation down to 2 V input
- 10 V maximum input voltage allowing use directly from 9 V alkaline batteries or 5 V regulated rails with wide headroom
- Compact SOT-23-5 package minimizing board area for point-of-load 1.8 V regulation adjacent to RF modules and microcontrollers
Applications
The MCP1801T-1802I/OT provides a clean regulated 1.8 V supply for low-voltage microcontrollers, RF transceivers, and memory devices in battery-powered portable electronics. With a 430 mV typical dropout voltage, it maintains regulation from single lithium-ion cells during discharge, making it suitable for Bluetooth Low Energy modules, ESP32 1.8 V core rails, and LPDDR memory supply in compact IoT designs. The SOT-23-5 package integrates easily alongside other SMD components on crowded mixed-signal PCBs.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-23-5 |
| Factory Lead Time | 16Weeks |
| YTEOL | 8 |
| 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 | 0.0288% |
| Load Regulation-Max | 0.05% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current1-Max | 0.15A |
| 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 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How low can the input voltage drop before the MCP1801T-1802I/OT loses regulation at full 150 mA load?
The MCP1801T-1802I/OT has a maximum dropout voltage of 530 mV at 150 mA output current, meaning it requires at least 2.33 V input to maintain the regulated 1.8 V output at full load. At lighter loads below 50 mA, the dropout drops to approximately 200 mV, extending usable operation to nearly 2.0 V input, which covers a lithium-ion cell discharging to its 3.0 V cutoff with substantial margin.
For an ESP32-based IoT sensor node, is the 150 mA output current of the MCP1801T sufficient for peak RF transmit bursts?
The ESP32 Wi-Fi transmit peaks can reach 500 mA momentarily, which exceeds the MCP1801T's 150 mA rating on the 1.8 V core supply alone. However, the MCP1801T is well matched to the 1.8 V I/O supply rail of the ESP32, which draws under 50 mA, while a higher-current LDO or DCDC converter handles the main 3.3 V rail. Pairing the MCP1801T with a 10 µF decoupling capacitor on the output suppresses transient voltage dips during 150 mA load steps within 1 µs.
When would a designer prefer the fixed 1.8 V MCP1801T over an adjustable LDO for a point-of-load LPDDR memory supply?
A fixed-output 1.8 V LDO like the MCP1801T eliminates the 2-resistor feedback divider required by adjustable regulators, reducing component count by 2 parts and removing the 0.1% resistor matching requirement that affects voltage accuracy. For LPDDR memories requiring 1.8 V ±5% tolerance (1.71 V to 1.89 V), the MCP1801T's factory-trimmed output accuracy of ±2% ensures compliance without a tolerance stack-up analysis across resistor tolerances and reference voltage variation.
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