Microchip Technology MCP1701T-3302I/MB

Overview

MCP1701T-3302I/MB from Microchip Technology is a 3.3V fixed-output, 250 mA CMOS low-dropout (LDO) linear voltage regulator in a 3-pin SOT-89 package, featuring 2.0 µA typical quiescent current, ±2% output voltage accuracy, and 400–700 mV dropout at 160 mA - optimized for lithium-ion, 9V alkaline, and solar-powered battery applications requiring ultra-low power consumption.

For engineers reviewing the MCP1701T-3302I/MB datasheet, MCP1701T-3302I/MB pinout, MCP1701T-3302I/MB application, or MCP1701T-3302I/MB equivalent, key selection criteria include dropout voltage at load, thermal performance in SOT-89, stability with 1 µF tantalum output capacitance, and compatibility with microcontroller power rails in space-constrained portable systems.

Technical Context

The MCP1701T-3302I/MB employs a P-channel MOSFET pass element enabling low dropout operation and near-constant quiescent current across load (2.0 µA typ. up to 250 mA), unlike bipolar regulators. Its internal voltage reference exhibits ±100 ppm/°C temperature drift and tight ±0.5% typical output regulation.

Stability is guaranteed with ≥1 µF output capacitance (tantalum or aluminum-electrolytic), and the device integrates short-circuit protection without external components. The SOT-89 package provides θ_JA = 52°C/W on 1 in² copper, supporting higher continuous current than the SOT-23A variant.

Key Specifications

Pinout & Package

Package: 3-pin SOT-89 (JEDEC TO-243), with tab connected to GND for thermal conduction and EMI reduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1701T-3302I/MB, the MCP1700T-3302E/MB trades 15°C operating margin for lower quiescent current, while the TPS78033QDRVRQ1 adds AEC-Q100 compliance and nanoamp IQ at the cost of ceramic capacitor dependency and higher BOM complexity.

Availability

MCP1701T-3302I/MB is available at Aetrix Electronics and suitable for battery-powered alarm circuits, smoke detectors, and smart battery packs requiring stable component supply with long-term lifecycle assurance.

Supply support for MCP1701T-3302I/MB 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 is a U.S.-based semiconductor company specializing in microcontrollers, analog, and interface products, with global manufacturing and quality certifications including ISO/TS-16949:2002.

The MCP1701 family was designed specifically for ultra-low-power, battery-critical applications such as portable safety devices and energy-harvesting systems - prioritizing micropower operation, wide input range, and minimal external component count.

FAQ

What is the maximum continuous output current for MCP1701T-3302I/MB at +85°C ambient?

The MCP1701T-3302I/MB delivers up to 160 mA continuously at +85°C ambient when mounted on 1 in² copper, based on its SOT-89 thermal resistance (θ_JA = 52°C/W) and 500 mW power dissipation limit. This is confirmed in the Electrical Characteristics table for V_OUT = 3.3V and is lower than the 250 mA rating at +25°C due to thermal derating.

Can MCP1701T-3302I/MB operate stably with a 1 µF ceramic output capacitor?

Yes, MCP1701T-3302I/MB is stable with 1 µF ceramic capacitors, though the datasheet specifies minimum 1 µF tantalum or aluminum-electrolytic types. Ceramic capacitors improve PSRR and transient response; ensure ESR remains >0.1Ω and resonant frequency >1 MHz per Section 4.1.

Does MCP1701T-3302I/MB require an input capacitor, and what value is recommended?

A 1 µF input capacitor is recommended for most applications, especially when source impedance exceeds 10Ω or when the input source is a battery or long trace. The capacitor must be placed within 5 mm of the VIN pin; ceramic, tantalum, or aluminum-electrolytic types are acceptable per Section 4.2.

How does the dropout voltage of MCP1701T-3302I/MB vary with load current?

Dropout voltage increases with load: 400–700 mV at 160 mA (per Electrical Characteristics table), rising to ~630 mV at 200 mA for 5.0V variants. For MCP1701T-3302I/MB specifically, Figure 2-14 shows dropout remains ≤650 mV up to 160 mA across –40°C to +85°C.

Is MCP1701T-3302I/MB pin-compatible with other SOT-89 LDOs like MIC5205-3.3YM5?

No - MCP1701T-3302I/MB uses PIN 1 = GND (tab), PIN 2 = VIN, PIN 3 = VOUT, whereas MIC5205-3.3YM5 uses PIN 1 = VIN, PIN 2 = GND, PIN 3 = VOUT. Direct replacement requires PCB layout revision; verify pinout in Table 3-1 before substitution.