Microchip Technology MCP73114-0NSI/MF

Overview

MCP73114-0NSI/MF from Microchip Technology is a single-cell Li-ion/Li-polymer linear battery charge management controller with integrated pass transistor, current sense, input overvoltage protection (5.8 V), and reverse discharge protection. It delivers 4.20 V regulated charge voltage with ±0.5% accuracy across –5°C to +55°C, supports 130–1100 mA resistor-programmable fast charge current, and operates from –40°C to +85°C in portable USB-powered devices.

For engineers reviewing the MCP73114-0NSI/MF datasheet, MCP73114-0NSI/MF pinout, MCP73114-0NSI/MF application, or MCP73114-0NSI/MF equivalent, this page provides verified technical context, validated pin functions, confirmed thermal regulation behavior, factory-set 4.20 V / 5.8 V OVP / 10% preconditioning / 6-hour elapsed timer / 10% end-of-charge threshold / 95% auto-recharge configuration, and real-world design implications for compact Li-ion charging systems.

Technical Context

The MCP73114-0NSI/MF implements a three-phase linear charge algorithm-preconditioning (10% of I_REG at V_BAT < 71.5% × V_REG), constant-current fast charge (programmed via R_PROG), and constant-voltage regulation (4.20 V)-with automatic transition logic and thermal regulation that reduces I_REG above ~105°C to maintain reliability.

Its dual safety architecture includes input overvoltage lockout at 5.8 V (hysteresis 150 mV), undervoltage lockout at 4.15 V (100 mV hysteresis), and battery short-circuit detection at 1.7 V (150 mV hysteresis), while the STAT pin provides open-drain status signaling with Type 1 fault output (high-Z on fault/complete).

Key Specifications

Pinout & Package

Package: DFN-10 (3 mm × 3 mm) with exposed thermal pad (EP); optimized for space-constrained PCB layouts and thermal dissipation via PCB copper area and vias.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar linear Li-ion charge management applications.

Compared with MCP73113-06S/MF, MCP73114-0NSI/MF provides superior spike immunity for USB ports due to its lower 5.8 V OVP threshold, while versus BQ24075RGTR it delivers simpler, lower-cost, and smaller-footprint charging without sacrificing core safety or regulation accuracy.

Availability

MCP73114-0NSI/MF is available at Aetrix Electronics and suitable for USB chargers, portable media players, and Bluetooth headsets requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for MCP73114-0NSI/MF 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, interface, and power management ICs, with a focus on embedded control and energy-efficient solutions.

The MCP73113/4 product line was designed specifically for cost-sensitive, space-constrained Li-ion charging in portable consumer electronics, integrating all essential analog control blocks into a single DFN package without requiring external FETs or configuration.

FAQ

What is the factory-set charge voltage and OVP threshold for MCP73114-0NSI/MF?

The MCP73114-0NSI/MF is factory-configured for 4.20 V battery regulation voltage and 5.8 V input overvoltage protection threshold. These values are laser-trimmed and non-adjustable; they are confirmed in Table 2 of DS20002183E and distinguish MCP73114-0NSI/MF from the MCP73113 series (6.5 V OVP). The 4.20 V setting aligns with standard single-cell Li-ion chemistry.

How does the PROG pin function in MCP73114-0NSI/MF beyond setting charge current?

In addition to programming fast charge current via R_PROG, the PROG pin serves as the charge enable input for MCP73114-0NSI/MF. When left floating or connected to an impedance >200 kΩ, the device enters shutdown mode with zero charge current and high-Z STAT output. This dual functionality eliminates the need for a separate enable signal in simple applications.

What is the preconditioning behavior of MCP73114-0NSI/MF, and how is it triggered?

MCP73114-0NSI/MF initiates preconditioning when V_BAT falls below 71.5% of its 4.20 V regulation voltage (i.e., ~3.00 V), supplying 10% of the programmed fast charge current. This mode lasts up to 32 minutes or until V_BAT exceeds the threshold. Preconditioning is factory-enabled and critical for safely recovering deeply discharged Li-ion cells without thermal stress.

Does MCP73114-0NSI/MF support automatic recharge, and at what threshold?

Yes, MCP73114-0NSI/MF supports automatic recharge at a factory-set threshold of 95% of its 4.20 V regulation voltage (~4.0 V). When battery voltage drops below this level after charge completion, the device automatically restarts the full charge cycle. This feature maintains battery readiness in always-on portable devices without host intervention.

What thermal protection mechanisms are implemented in MCP73114-0NSI/MF?

MCP73114-0NSI/MF features two-tier thermal protection: (1) continuous thermal regulation that progressively reduces charge current above ~105°C to sustain operation, and (2) hard thermal shutdown at 150°C (10°C hysteresis) as a fail-safe. Both are inherent to the silicon design and require no external components, ensuring reliability under sustained high-ambient or high-power conditions.