MCP1701AT-1802I/CB Microchip Integrated Circuit (SOT23 (3-Pin)) In Stock
The MCP1701AT-1802I/CB is an ultra-low quiescent current LDO linear regulator with only 2 µA typical standby current, offering a fixed 1.8V output from a 2.8V to 10V input. It delivers up to 250 mA output in a compact SOT-23-3 package, ideal for battery-powered IoT applications.
- Manufacturer
- Microchip
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP1701AT-1802I/CB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.4600(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
- Ultra-low 2 µA quiescent current extends battery life in duty-cycled IoT and sensor nodes
- Fixed 1.8V output with only 0.18V typical dropout voltage for efficient low-voltage conversion
- Wide 2.8V to 10V input range supports single-cell Li-Ion, alkaline, and USB power sources
- 250 mA output current capacity with short-circuit and thermal protection for robust operation
- Tiny SOT-23-3 (3-pin) package with only 2 external capacitors for a complete regulator solution
Applications
The MCP1701AT-1802I/CB is optimized for battery-powered wireless sensor nodes, IoT edge devices, and wearable electronics where the 2 µA quiescent current is critical for extending shelf life between maintenance cycles. Its 1.8V fixed output directly supplies modern low-voltage microcontrollers, BLE SoCs, and MEMS sensors without additional level shifting. The wide 2.8V to 10V input range accommodates single-cell Li-Ion (3.7V), 2×AAA alkaline, and even 9V battery applications from a single LDO design.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-23A-3 |
| Factory Lead Time | 16Weeks |
| YTEOL | 8 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.3V |
| Dropout Voltage1-Nom | 0.18V |
| Input Voltage Absolute-Max | 12V |
| Input Voltage-Max | 10V |
| Input Voltage-Min | 2.8V |
| JESD-30 Code | R-PDSO-G3 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.03888% |
| Load Regulation-Max | 0.0288% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current1-Max | 0.11A |
| Output Voltage1-Max | 1.836V |
| Output Voltage1-Min | 1.764V |
| Output Voltage1-Nom | 1.8V |
| 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
How does the MCP1701AT-1802I/CB achieve a 2 µA quiescent current, and why does that matter for battery life?
The MCP1701AT-1802I/CB is architected as a CMOS LDO with a bias circuit drawing only 2 µA typical quiescent current, which translates to a standby power dissipation of only 3.6 µW from a 1.8V output. A 200 mAh coin cell powering a duty-cycled IoT node drawing 2 µA standby can sustain over 11 years of shelf life from the regulator alone.
What is the dropout voltage of the MCP1701AT-1802I/CB, and how does it affect the minimum usable input voltage?
The MCP1701AT-1802I/CB has a nominal dropout voltage of 0.18V (maximum 0.3V at 250 mA), meaning the input must exceed 1.8V + 0.3V = 2.1V worst-case to maintain regulation. This low dropout makes it usable from a deeply discharged single-cell Li-Ion battery down to approximately 2.8V minimum input.
Which external components are needed for a complete MCP1701AT-1802I/CB 1.8V regulator circuit?
The MCP1701AT-1802I/CB requires only a 1 µF input capacitor and a 1 µF output capacitor for stable operation; no compensation resistors or additional components are needed. This minimal 3-component BOM (IC + 2 capacitors) in a SOT-23-3 package occupies less than 5 mm² of PCB area.
For a BLE sensor node running at 1.8V, how does the MCP1701AT-1802I/CB compare to a switching regulator for efficiency?
At the micro-ampere standby currents typical of a sleeping BLE SoC, a linear LDO like the MCP1701AT-1802I/CB outperforms a switching regulator because switchers typically consume 10 µA to 50 µA quiescent current. For a node spending 99% of its time sleeping at 5 µA total current, the LDO's 2 µA quiescent overhead is negligible and eliminates switching noise that can degrade BLE radio sensitivity.
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