Microchip Technology MCP73833T-GPI/MF

Overview

MCP73833T-GPI/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 a P-channel MOSFET pass transistor, current sense, reverse discharge protection, and thermal regulation. It delivers up to 1 A programmable charge current with ±0.75% accuracy on 4.20 V, 4.35 V, 4.40 V, or 4.50 V fixed voltage regulation - optimized for USB-powered portable devices including Bluetooth headsets and digital cameras.

For engineers reviewing the MCP73833T-GPI/MF datasheet, MCP73833T-GPI/MF pinout, MCP73833T-GPI/MF application, or MCP73833T-GPI/MF equivalent, key selection criteria include its integrated thermal regulation, factory-programmed voltage option (4.20 V), DFN-10 thermal performance (θJA = 41 °C/W), dual status outputs (STAT1/STAT2), and PG output for input power validation - all critical for space-constrained, thermally sensitive battery charging designs.

Technical Context

The MCP73833T-GPI/MF implements a constant-current/constant-voltage (CC/CV) charge algorithm with preconditioning, automatic end-of-charge termination, and automatic recharge. Its internal P-channel MOSFET pass transistor features 300 mΩ typical R_DS(ON), enabling efficient linear regulation while supporting thermal foldback down to zero current at 150 °C junction temperature.

It uses a single external resistor (PROG-to-VSS) to set fast charge current (90–1100 mA range), with preconditioning and termination currents defined as ratiometric percentages (e.g., 5% I_REG for termination). The THERM pin integrates a 50 µA bias current source and dual comparators (1.23 V / 0.25 V thresholds) for NTC thermistor-based temperature monitoring.

Key Specifications

Pinout & Package

Package: DFN-10 (3 mm × 3 mm) with exposed thermal pad (EP) electrically connected to VSS. Requires soldering EP to PCB ground plane for thermal 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 BQ24075RGTR and TP4056, the MCP73833T-GPI/MF uniquely combines factory-trimmed 4.20 V accuracy, integrated PG output for input validation, and autonomous thermal foldback - making it optimal for USB-compliant, thermally constrained, and safety-aware portable electronics.

Availability

MCP73833T-GPI/MF is available at Aetrix Electronics and suitable for USB-powered portable devices, wearable health monitors, and Bluetooth audio accessories requiring stable component supply, long-term lifecycle support, and consistent thermal performance across production volumes.

Supply support for MCP73833T-GPI/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 devices, and battery management solutions for embedded and industrial applications.

The MCP73833/4 product line was designed specifically for space-constrained, cost-sensitive Li-ion/Li-polymer charging in portable electronics - emphasizing integration, thermal resilience, and USB compliance without external components.

FAQ

What is the factory-programmed voltage regulation setting for the MCP73833T-GPI/MF?

The MCP73833T-GPI/MF is factory-programmed for 4.20 V ±0.75% constant-voltage regulation - matching standard single-cell Li-ion chemistry. This value is laser-trimmed and cannot be adjusted externally; other variants (e.g., MCP73833T-FCI/MF) offer 4.35 V, 4.40 V, or 4.50 V options.

How does the MCP73833T-GPI/MF handle thermal management during high-current charging?

The MCP73833T-GPI/MF implements active thermal regulation: as junction temperature rises above ~105 °C, it automatically reduces charge current to maintain safe operating temperature. This foldback behavior - documented in Figure 4-2 of DS22005B - avoids hard thermal shutdown and preserves charge progress under sustained load.

Can the MCP73833T-GPI/MF be used without a battery connected?

Yes - the MCP73833T-GPI/MF supports System Test (LDO) mode. By driving the THERM pin above (VDD − 100 mV) with no battery attached, it regulates VBAT to the factory-set 4.20 V output, delivering up to the programmed current limit - enabling board-level functional testing without battery dependency.

What is the function of the PG pin on the MCP73833T-GPI/MF?

The PG (Power Good) pin on the MCP73833T-GPI/MF is a pseudo open-drain output that sinks current only when VDD exceeds the UVLO threshold (≥3.55 V) and remains above the battery voltage (VDD > VBAT). It provides hardware-level confirmation that input power is valid and sufficient to sustain charging - critical for system power sequencing.

Does the MCP73833T-GPI/MF support automatic recharge, and what triggers it?

Yes, the MCP73833T-GPI/MF supports automatic recharge. After reaching charge completion, it continuously monitors VBAT and initiates a new charge cycle when battery voltage drops to 94.0% of VREG (i.e., 3.95 V for the 4.20 V variant). This threshold is factory-fixed and ensures optimal Li-ion cell longevity by preventing deep discharge between cycles.