Microchip Technology MCP73833-NVI/MF

Overview

MCP73833-NVI/MF from Microchip Technology is a stand-alone linear Li-ion/Li-polymer battery charge management controller in a 10-lead DFN-3×3 package. It integrates pass transistor, current sense, reverse discharge protection, and thermal regulation. It delivers up to 1 A programmable charge current with ±0.75% voltage accuracy at 4.20 V, 4.35 V, 4.40 V, or 4.50 V, and supports preconditioning, automatic end-of-charge, and recharge - ideal for USB-powered portable devices.

For engineers reviewing the MCP73833-NVI/MF datasheet, MCP73833-NVI/MF pinout, MCP73833-NVI/MF application, or MCP73833-NVI/MF equivalent, key selection criteria include its factory-set CV voltage option, PROG-resistor-based current programming, dual status outputs (STAT1/STAT2), integrated thermistor monitoring, and PG output for input power validation in space-constrained battery charging designs.

Technical Context

The MCP73833-NVI/MF implements a constant-current/constant-voltage (CC/CV) charge algorithm with selectable preconditioning threshold (64–75% of VREG), termination current ratio (3.75–25% of IREG), and automatic recharge threshold (94–96.5% of VREG). Its internal P-channel MOSFET pass transistor features 300 mΩ typical R_DS(ON) and thermal regulation that dynamically reduces charge current above ~105°C to prevent overheating.

It operates across –40°C to +85°C ambient, supports USB-compliant input (3.75–6 V), and includes UVLO with 100 mV hysteresis (V_START = 3.55 V, V_STOP = 3.45 V), automatic power-down when VDD falls within 50 mV of VBAT, and system test (LDO) mode enabled via THERM pin biasing.

Key Specifications

Pinout & Package

Package: DFN-10 (3 mm × 3 mm), thermally enhanced with exposed pad (EP) electrically tied to VSS. Requires solder connection of EP to ground plane for thermal performance and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP73831T-2DCI/OT, the MCP73833-NVI/MF provides higher current, thermal safety, and input validation; compared with BQ24075RGTR, it offers simpler integration and lower component count but lacks digital control and power-path arbitration.

Availability

MCP73833-NVI/MF is available at Aetrix Electronics and suitable for USB chargers, wearable electronics, handheld industrial terminals, and medical sensors requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for MCP73833-NVI/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 is a global semiconductor company specializing in microcontrollers, analog, and interface solutions for embedded control applications.

The MCP7383x family is designed for highly integrated, space-constrained Li-ion/Li-polymer battery charging in portable consumer and industrial electronics - emphasizing minimal external components, factory-configurable precision, and robust safety features.

FAQ

What voltage options are supported by the MCP73833-NVI/MF?

The MCP73833-NVI/MF is factory-configured for one of four precise constant-voltage (CV) setpoints: 4.20 V, 4.35 V, 4.40 V, or 4.50 V, each with ±0.75% tolerance. This allows direct compatibility with diverse Li-ion and Li-polymer cell chemistries without external feedback resistors. The specific CV value for MCP73833-NVI/MF is 4.20 V, as indicated by the "N" in the part number per Microchip's product identification system.

How is charge current programmed on the MCP73833-NVI/MF?

Charge current is set using a single external resistor (R_PROG) connected between the PROG pin and VSS. The relationship is I_REG = 1000 V / R_PROG, where R_PROG is in kΩ and I_REG is in mA. For example, a 1.0 kΩ resistor yields ~1000 mA. The MCP73833-NVI/MF supports up to 1 A, and R_PROG values from 1 kΩ to 20 kΩ are valid for normal operation.

Does the MCP73833-NVI/MF include thermal protection?

Yes, the MCP73833-NVI/MF incorporates dual thermal safeguards: (1) thermal regulation - gradually reduces charge current above ~105°C to maintain safe die temperature, and (2) thermal shutdown - halts charging completely at 150°C with 10°C hysteresis. Both functions are fully integrated and require no external components, ensuring reliable operation in sealed or high-ambient environments for the MCP73833-NVI/MF.

What is the function of the PG pin on the MCP73833-NVI/MF?

The PG (Power Good) pin on the MCP73833-NVI/MF is a pseudo open-drain output that sinks current when the input supply (VDD) is above the UVLO threshold (≥3.55 V) and exceeds the battery voltage (VBAT). It provides hardware-level validation that input power is present and valid - enabling system-level power sequencing or fault detection without MCU polling. This feature is exclusive to the MCP73833 variant (not MCP73834).

Can the MCP73833-NVI/MF operate without a battery connected?

Yes, the MCP73833-NVI/MF supports System Test (LDO) mode: when the THERM pin is driven above (VDD – 100 mV) and no battery is present, it regulates VBAT to the factory-set CV voltage (4.20 V for MCP73833-NVI/MF) with current limiting defined by the PROG resistor. This allows functional testing of downstream circuitry before battery integration.