Monolithic Power Systems Inc. MEZS7-1ALINEARCHARGER

Overview

MEZS7-1ALINEARCHARGER from Monolithic Power Systems is a pre-validated, standalone 1A linear Li-ion battery charging solution module built around the MP26029GQ-0000 IC. It delivers autonomous CC/CV charging (30–1000 mA configurable), 0.5% voltage accuracy at 4.2 V, thermal regulation, and fault-aware STAT pin indication for single-cell batteries powered by USB or 5 V AC adapters.

For engineers reviewing the MEZS7-1ALINEARCHARGER datasheet, MEZS7-1ALINEARCHARGER pinout, MEZS7-1ALINEARCHARGER application, or MEZS7-1ALINEARCHARGER equivalent, this module provides production-ready layout, BOM, thermal management, and jumper-configurable charge current - eliminating charger IC validation overhead in portable power subsystems.

Technical Context

This is a board-level reference design implementing the MP26029 - a fully integrated linear charger with internal PMOS pass device, battery temperature monitoring via NTC interface, safety timer, and auto-recharge logic. It operates without external blocking diodes and supports input up to 13 V with VIN range 4.35–5.50 V.

The module implements fixed 4.2 V CV regulation and uses four 0603 jumpers (JP1–JP4) to set discrete charge currents: 32 mA, 114 mA, 484 mA, and 1006 mA. The STAT pin provides real-time status via open-drain output with defined low/high/blinking states per charging phase.

Key Specifications

Availability

MEZS7-1ALINEARCHARGER is available at Aetrix Electronics and suitable for smart handheld devices, Bluetooth peripherals, digital cameras, and educational robotics requiring stable component supply and rapid prototyping of Li-ion charging subsystems.

Supply support for MEZS7-1ALINEARCHARGER 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

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management ICs, including DC/DC converters, battery chargers, LED drivers, and motor drivers for consumer, industrial, and automotive markets.

The MEZS7-1ALINEARCHARGER belongs to MPS's Solution Module product line - purpose-built evaluation and production boards that integrate their power ICs with validated layout, passive components, and firmware-free operation to accelerate time-to-prototype for battery-powered edge devices.

FAQ

What battery chemistries does the MEZS7-1ALINEARCHARGER support?

This module is configured for single-cell Li-ion and Li-polymer batteries only, with fixed 4.2 V CV regulation and JEITA-compliant charge termination. It does not support LiFePO₄, NiMH, or multi-cell stacks. Battery temperature sensing is implemented via an onboard NTC resistor interface compatible with standard 10 kΩ NTC thermistors.

How is charge current selected on the MEZS7-1ALINEARCHARGER?

Charge current is set using four 0603 solder-jumpers (JP1–JP4) located near U2. Each jumper position corresponds to a discrete current value: JP1=32 mA, JP2=114 mA, JP3=484 mA, JP4=1006 mA. Only one jumper should be installed at a time; no software or register programming is required.

Does the module include input overvoltage protection?

The MEZS7-1ALINEARCHARGER relies on the MP26029's internal 13 V absolute maximum input rating and thermal foldback for transient suppression. It does not include external TVS diodes or OVP circuitry - system-level input protection must be added upstream if operating beyond 5.5 V nominal input or in electrically noisy environments.

Can the STAT pin drive an external LED directly?

Yes - the STAT pin is an open-drain output rated for 20 mA sink current. A series current-limiting resistor (e.g., 1 kΩ) to 3.3 V or 5 V rail allows direct connection to an external LED for visual charging status, matching the onboard red LED behavior documented in Table 1 of the reference guide.

Is the MP26029 IC accessible for reprogramming or configuration?

No - the MP26029 on this module is factory-configured (MP26029GQ-0000) with fixed 4.2 V regulation and default safety timers. Register access is not exposed; all functionality is hardwired via passive components and jumpers. For programmable variants, refer to the standalone MP26029 datasheet and consider custom design.

What certifications or compliance documentation is provided with the module?

The MEZS7-1ALINEARCHARGER is RoHS-compliant, halogen-free, and lead-free per MPS quality assurance standards. No standalone safety certifications (UL, IEC 62368) are included - end-equipment certification remains the responsibility of the integrator. Full compliance data is available in the MPS Quality Assurance portal under document QAS-001.