MCP1701AT-2502I/CB Microchip Integrated Circuit (SOT23 (3-Pin)) In Stock
Microchip MCP1701AT-2502I/CB is a fixed 2.5 V low-dropout LDO voltage regulator with 400 mV typical dropout in a SOT-23-3 package. Accepts 3.5 V to 10 V input, draws only 2 µA quiescent current for ultra-low standby power in battery applications. Available in tape-and-reel with worldwide distribution.
- Manufacturer
- Microchip
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP1701AT-2502I/CB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.4900(MOQ 100)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 2.5 V output with 0.4 V typical dropout enabling operation from single Li-ion cell down to 2.9 V input
- Ultra-low quiescent current of 2 µA extends coin-cell battery runtime in always-on IoT sensor nodes
- Input voltage range of 3.5 V to 10 V accommodates alkaline battery packs and unregulated adapter supplies
- SOT-23-3 package requires minimal PCB space and only 2 external bypass capacitors for stable 2.5 V regulation
Applications
MCP1701AT-2502I/CB is designed for battery-powered wireless sensor nodes, RFID readers, and low-power microcontroller supply rails where minimizing standby current is essential. Its 2 µA quiescent current and 2.5 V fixed output are matched to PIC and AVR microcontrollers that require stable sub-3 V power from alkaline or lithium primary cells. The device also suits always-on reference supply rails in portable medical monitors and industrial condition monitoring devices.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-23A-3 |
| Factory Lead Time | 16Weeks |
| YTEOL | 8 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.7V |
| Dropout Voltage1-Nom | 0.4V |
| Input Voltage Absolute-Max | 12V |
| Input Voltage-Max | 10V |
| Input Voltage-Min | 3.5V |
| JESD-30 Code | R-PDSO-G3 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.04875% |
| Load Regulation-Max | 0.09% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current1-Max | 0.125A |
| Output Voltage1-Max | 2.55V |
| Output Voltage1-Min | 2.45V |
| Output Voltage1-Nom | 2.5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TO-236 |
| 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 |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Voltage Tolerance-Max | 2% |
| Package | SOT23 (3-Pin) |
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
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the dropout voltage of MCP1701AT-2502I/CB, and can it be powered from a single AA alkaline cell?
MCP1701AT-2502I/CB has a typical dropout voltage of 0.4 V and a maximum of 0.7 V at full load. A single AA alkaline cell starts at 1.5 V, which is insufficient for the 3.5 V minimum input; however, two AA cells in series (nominally 3 V) fall below the 3.5 V minimum. A 3-cell AA pack at 4.5 V input easily maintains the 2.5 V output down to 3.2 V input.
How does MCP1701AT-2502I/CB's 2 µA quiescent current benefit always-on IoT sensor designs?
At 2 µA quiescent current, MCP1701AT-2502I/CB draws only 2 mAh per 1000 hours of standby. A 250 mAh coin cell (CR2032) powering only the LDO quiescent current would last over 14 years theoretically, making it practical for sensors that wake every few minutes and spend most time in deep sleep at sub-microamp MCU current.
What output capacitor is recommended for stable operation of MCP1701AT-2502I/CB?
MCP1701AT-2502I/CB requires a minimum 1 µF output capacitor with ESR between 0.01 Ω and 10 Ω for stable regulation. A 4.7 µF ceramic capacitor in X5R or X7R dielectric at the output is recommended to handle transient load steps while maintaining phase margin. Adding a 100 nF input bypass capacitor reduces high-frequency noise at the regulator input.
When would MCP1701AT-2502I/CB be selected over a switching regulator for a 2.5 V supply rail?
MCP1701AT-2502I/CB is preferred over a switching regulator when output current requirements are below 250 mA and switching noise would interfere with sensitive analog measurements. The LDO produces no switching harmonics, making it ideal for precision ADC reference supplies, audio codec power rails, and RF module VCC lines where a buck converter's 1–2 MHz ripple would degrade signal quality.
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