Microchip Technology MCP16415T-I/UN

Overview

MCP16415T-I/UN from Microchip Technology is a synchronous boost DC-DC converter with automatic input-to-output bypass mode, designed for battery-powered IoT and portable electronics. It operates from 0.8V to 5.25V input, delivers up to 450 mA at 5.0V output from 3.6V input, features 5 μA quiescent current in PFM mode, and achieves 96% peak efficiency-enabling extended runtime in single-cell Li-ion or two-cell alkaline/NiMH systems.

For engineers reviewing the MCP16415T-I/UN datasheet, MCP16415T-I/UN pinout, MCP16415T-I/UN application, or MCP16415T-I/UN equivalent, key selection criteria include its auto-bypass capability, programmable UVLO/LBO, 500 kHz PWM or automatic PFM/PWM operation, and support for MSOP-10 and TDFN 3×3 mm packages in industrial temperature range (–40°C to +85°C).

Technical Context

The MCP16415T-I/UN implements a synchronous rectified boost topology with integrated high- and low-side MOSFETs, enabling high efficiency across wide load and input voltage ranges. Its auto-bypass function engages when V_IN ≥ V_OUT – 100 mV, eliminating switching losses and reducing quiescent current to 2.3 μA in shutdown.

It supports automatic PFM/PWM mode transition based on load demand, maintains stable regulation during cold-start from 0.8V, and includes internal compensation-removing external loop components. The device integrates programmable undervoltage lockout and low-battery output signaling without requiring external resistors.

Key Specifications

Pinout & Package

Package: 10-lead MSOP (3.0 mm × 4.9 mm, 0.5 mm pitch) and 10-lead 3 mm × 3 mm TDFN (0.5 mm pitch), both rated for –40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar boost converter applications.

Compared with TPS610992DRCR and MAX17222ETA+, the MCP16415T-I/UN uniquely combines auto-bypass, programmable UVLO/LBO, and output discharge in a single 10-pin package-making it the only option supporting full battery-state awareness and safe power-down in compact Li-ion IoT endpoints.

Availability

MCP16415T-I/UN is available at Aetrix Electronics and suitable for personal healthcare devices, Bluetooth® headsets, and remote controllers requiring stable component supply, long-term lifecycle assurance, and industrial-grade temperature performance.

Supply support for MCP16415T-I/UN 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 devices, and power management ICs, with global manufacturing and quality certifications including ISO 9001 and AEC-Q200.

The MCP1641X family was engineered specifically for battery-constrained portable electronics, emphasizing ultra-low quiescent current, adaptive efficiency modes, and integrated battery monitoring to maximize usable energy per charge cycle.

FAQ

What is the minimum input voltage required for MCP16415T-I/UN to start switching?

The MCP16415T-I/UN starts switching at 0.8V after initial startup. It can initiate regulation from as low as 0.8V input, making it compatible with deeply discharged alkaline or NiMH cells. This low start-up voltage is enabled by its optimized low-voltage architecture and internal charge pump circuitry - a key differentiator from standard boost converters that require ≥1.8V to begin operation. The MCP16415T-I/UN maintains regulation across the full 0.8V–5.25V input range.

Does MCP16415T-I/UN support automatic transition between PFM and PWM modes?

Yes, the MCP16415T-I/UN operates in automatic PFM/PWM mode - it seamlessly switches between pulse-frequency modulation for light loads (to minimize quiescent current) and fixed 500 kHz pulse-width modulation under heavier loads (to reduce output ripple and improve transient response). This behavior is inherent to the MCP16415T-I/UN variant and does not require external configuration. The transition threshold is internally set and load-dependent, ensuring optimal efficiency across dynamic usage profiles.

How is the UVLO threshold programmed on MCP16415T-I/UN?

The UVLO threshold on MCP16415T-I/UN is set using a single external resistor connected between the UVLO pin and GND. The device uses an internal 1.2 μA current source to develop a voltage drop across this resistor; the resulting voltage determines the input voltage level at which the regulator disables. For example, a 200 kΩ resistor sets UVLO ≈ 2.4V. This same resistor also defines the LBO assertion point, enabling coordinated battery monitoring with one passive component - a feature confirmed in the official MCP1641X datasheet (DS20006444A).

Can MCP16415T-I/UN be used with single-cell Li-ion batteries?

Yes, the MCP16415T-I/UN is explicitly qualified for single-cell Li-ion and Li-Polymer batteries, supporting input voltages from 2.7V (fully discharged) to 4.2V (fully charged). Its auto-bypass mode activates when VIN approaches VOUT, minimizing losses during the upper 30% of battery discharge - a critical advantage over conventional boosters that waste energy as heat in this range. The MCP16415T-I/UN's 5 μA quiescent current further extends usable runtime in always-on Li-ion applications.

What is the purpose of the DIS pin on MCP16415T-I/UN?

The DIS (Discharge) pin on MCP16415T-I/UN enables active discharge of the output capacitor during shutdown. When driven high, it turns on an internal NMOS FET between VOUT and GND, rapidly bleeding stored charge. This function is essential for meeting safety standards in medical wearables and consumer electronics where residual output voltage could cause unintended behavior or user shock hazard. The DIS feature is implemented in the MCP16415T-I/UN variant and is documented in Microchip's MCP1641X family datasheet.