Monolithic Power Systems Inc. MP26029GQ-0000-Z

Overview

MP26029GQ-0000-Z from Monolithic Power Systems is a standalone, linear single-cell Li-ion/Li-polymer battery charger IC with integrated thermal regulation, ±0.5% battery voltage accuracy (4.20 V), programmable charge current up to 1 A via ISET resistor, and NTC-based battery temperature monitoring. It operates from 4.35 V to 5.5 V USB input and supports pre-charge, constant-current (CC), constant-voltage (CV), auto-recharge, and safety timer functions in portable consumer electronics.

For engineers reviewing the MP26029GQ-0000-Z datasheet, MP26029GQ-0000-Z pinout, MP26029GQ-0000-Z application, or MP26029GQ-0000-Z equivalent, key selection criteria include thermal regulation threshold (120°C), input voltage limit (4.5 V default), NTC cold/hot window programmability, OTP-configurable termination current (10% ICC), and QFN-10 (3 mm × 3 mm) package compatibility with high-power density PCB layouts.

Technical Context

The MP26029GQ-0000-Z implements a fully autonomous linear charging architecture with on-chip power MOSFET (RON_BATT = 530 mΩ typical in QFN-10), eliminating external blocking diodes. Its control loop integrates independent pre-charge (10% ICC), fast-charge (programmable 30 mA–1 A), and CV regulation stages, all governed by internal reference accuracy and OTP-programmable thresholds.

Thermal regulation is implemented via real-time junction temperature sensing (TJ_REG = 120°C default), dynamically reducing charge current before reaching thermal shutdown (150°C). The NTC interface uses ratiometric voltage comparison against internal dividers to detect out-of-range battery temperatures without external ADCs or microcontroller intervention.

Key Specifications

Pinout & Package

MP26029GQ-0000-Z is housed in a thermally enhanced 10-pin QFN package (3 mm × 3 mm, 0.5 mm pitch) with exposed thermal pad. The package supports 2.5 W continuous power dissipation (θJA = 50°C/W) and requires soldering the EP pad to PCB ground for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar single-cell Li-ion linear charger applications.

Compared with BQ24075RGTR and TP4056, MP26029GQ-0000-Z delivers superior thermal management (120°C regulation + 150°C shutdown), factory-configurable safety parameters via OTP, and true autonomous operation - critical for compact, thermally constrained, or certified medical/consumer devices.

Availability

MP26029GQ-0000-Z is available at Aetrix Electronics and suitable for wireless headphones, Bluetooth trackers, portable medical sensors, and smart toys requiring stable component supply, consistent OTP configuration (0000), and QFN-10 thermal performance.

Supply support for MP26029GQ-0000-Z 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 analog and power ICs, with over two decades of expertise in DC-DC conversion, battery management, and motor control solutions.

The MP26029 product line targets space-constrained, thermally sensitive portable electronics requiring fully autonomous, OTP-configurable Li-ion charging - emphasizing integration, safety, and minimal external component count.

FAQ

What is the default OTP configuration for MP26029GQ-0000-Z?

The "0000" suffix indicates factory-programmed OTP settings: 4.20 V battery regulation voltage, 10% charge termination current (ITERM), 4.5 V input voltage limit, 120°C thermal regulation threshold, 3.0 V pre-charge threshold, 200 mV auto-recharge delta, and 7-hour safety timer. These values are permanently stored and require no external configuration.

How does the NTC interface work without external biasing?

The MP26029GQ-0000-Z uses an internal ratiometric reference divider tied to the IN pin. The NTC thermistor forms an external divider between IN and GND. The IC compares the voltage ratio at the NTC pin against internal VHOT (26.5–30.5% of VIN) and VCOLD (59.5–63.5% of VIN) thresholds - eliminating need for external voltage references or op-amps.

Can MP26029GQ-0000-Z operate from a 9 V wall adapter?

No. The absolute maximum input voltage is 13 V, but recommended operating input is 4.35–5.5 V for USB compatibility. Using 9 V exceeds the input voltage limit (default 4.5 V) and triggers immediate current foldback - sustained operation risks thermal stress. A buck converter or LDO must precede the MP26029 for >6 V sources.

What is the minimum ISET resistor value for 1 A charge current?

Per Equation (1) and Table 2, a 3.01 kΩ ±1% resistor sets typical 1,006 mA charge current. The datasheet specifies ±10% tolerance, so 2.71 kΩ is the practical lower bound to guarantee ≥900 mA under worst-case conditions. Values below 2.7 kΩ risk exceeding 1 A and violating absolute maximum ratings.

Does the STAT pin require an external pull-up resistor?

Yes. STAT is an open-drain output that pulls low during charging and floats high-impedance when charging completes. An external pull-up (typically 10 kΩ to 3.3 V or 5 V) is mandatory to generate a logic-high signal for MCU detection or LED driving - no internal pull-up exists.

How does thermal regulation differ from thermal shutdown?

Thermal regulation (TJ_REG = 120°C default) continuously reduces charge current to hold junction temperature at or below 120°C, enabling continued (slower) charging. Thermal shutdown (TJ_SHDN = 150°C) forces immediate MOSFET turn-off and halts charging entirely until temperature falls below 130°C hysteresis - a last-resort safety mechanism.

Is the QFN-10 package RoHS and REACH compliant?

Yes. All MP26029 variants, including MP26029GQ-0000-Z, are lead-free, halogen-free, and fully compliant with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. MPS green status documentation is available on their official website under Quality Assurance.