Microchip Technology MCP1701-3002I/TO

Overview

MCP1701-3002I/TO from Microchip Technology is a fixed-output, 3.0V, ±2% tolerance CMOS low-dropout linear regulator delivering up to 250 mA output current with only 2.0 µA typical quiescent current and 400–700 mV dropout (at 120–160 mA). It operates across 2.5V to 10.0V input range and supports battery-powered smoke detectors, CO₂ sensors, and microcontroller power rails where ultra-low standby consumption and stable voltage regulation are critical.

For engineers reviewing the MCP1701-3002I/TO datasheet, MCP1701-3002I/TO pinout, MCP1701-3002I/TO application, or MCP1701-3002I/TO equivalent, key selection considerations include its SOT-89 package thermal performance (θJA = 52°C/W), 1 µF minimum output capacitance requirement, ±100 ppm/°C temperature coefficient, and compatibility with tantalum, aluminum-electrolytic, or ceramic capacitors.

Technical Context

The MCP1701-3002I/TO employs a P-channel MOSFET pass element enabling low dropout operation without load-dependent quiescent current increase. Its internal voltage reference and error amplifier deliver ±0.5% typical output accuracy and excellent line regulation (0.2%/V typ.) over input voltages from VR + 1.0V to 10.0V.

Short-circuit protection actively limits output current during fault conditions, while stability is ensured with ≥1 µF output capacitance and ESR between 0.1 Ω and 5 Ω. The device is specified for –40°C to +85°C ambient operation and requires minimal PCB copper area for thermal management in SOT-89 mounting.

Key Specifications

Pinout & Package

Package: 3-pin SOT-89 (JEDEC TO-243), with tab connected to GND for thermal conduction and mechanical anchoring. Mounting on ≥1 in² copper improves θJA to 52°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with MCP1700-3002E/TO and TPS78230DRVR, the MCP1701-3002I/TO delivers the best balance of ultra-low IQ, wide input range, and relaxed capacitor requirements for cost-sensitive, battery-operated commercial equipment-without requiring thermal derating below +85°C or complex layout constraints.

Availability

MCP1701-3002I/TO is available at Aetrix Electronics and suitable for smoke detectors, CO₂ monitors, and smart battery packs requiring stable component supply, long-term lifecycle support, and guaranteed traceability for ISO 9001-certified production.

Supply support for MCP1701-3002I/TO includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a leading provider of microcontrollers, analog components, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The MCP1701 family was designed specifically for ultra-low-power, battery-critical applications such as portable safety and environmental monitoring systems-emphasizing micropower efficiency, small footprint, and robustness across wide input and temperature ranges.

FAQ

What is the maximum input voltage rating for the MCP1701-3002I/TO?

The MCP1701-3002I/TO has an absolute maximum input voltage of +12V, but its recommended operating input voltage is up to 10.0V. Exceeding 10.0V may reduce reliability or trigger overvoltage stress, especially at elevated temperatures. For designs using 9V alkaline or dual-cell Li-ion sources, operation within 2.5V to 10.0V ensures full specification compliance and long-term stability.

Can the MCP1701-3002I/TO operate with ceramic output capacitors?

Yes, the MCP1701-3002I/TO is stable with ceramic output capacitors, provided they meet the ESR requirement of 0.1 Ω to 5 Ω and have resonant frequency above 1 MHz. A 1 µF X7R ceramic capacitor with ~1 Ω ESR satisfies these criteria and improves PSRR at high frequencies compared to tantalum alternatives.

What is the thermal resistance (θJA) of the MCP1701-3002I/TO in its SOT-89 package?

The MCP1701-3002I/TO in the SOT-89 package has a typical junction-to-ambient thermal resistance (θJA) of 52°C/W when mounted on 1 square inch of 2-oz copper. This value assumes standard FR-4 PCB layout with the tab soldered directly to the ground plane; reduced copper area or poor thermal via placement will increase θJA and require corresponding output current derating.

Does the MCP1701-3002I/TO include reverse-polarity protection?

No, the MCP1701-3002I/TO does not integrate reverse-polarity protection. If the input supply is subject to incorrect connection (e.g., in field-serviceable battery compartments), an external series Schottky diode or PMOS FET must be added to prevent damage. The device's absolute maximum rating for output voltage is (GND – 0.3V), so reverse bias on VOUT can cause latch-up or permanent failure.

How does load current affect quiescent current in the MCP1701-3002I/TO?

The MCP1701-3002I/TO maintains a nearly constant 2.0 µA typical quiescent current across its full 0–250 mA load range. Unlike bipolar LDOs, its CMOS architecture ensures IQ remains independent of output current-critical for maintaining predictable battery discharge profiles in intermittent-load applications like wireless sensor nodes.