Monolithic Power Systems Inc. MP26029GQ-0000-P

Overview

MP26029GQ-0000-P from Monolithic Power Systems is a standalone linear Li-ion/Li-polymer battery charger IC with integrated power MOSFET, thermal regulation (120°C junction limit), ±0.5% battery voltage accuracy (4.2V), and programmable 30mA–1A charge current via ISET resistor. It supports USB/AC input up to 13V, includes NTC-based temperature monitoring, input voltage limit regulation, and auto-recharge-used in compact portable devices requiring autonomous single-cell charging.

For engineers reviewing the MP26029GQ-0000-P datasheet, MP26029GQ-0000-P pinout, MP26029GQ-0000-P application, or MP26029GQ-0000-P equivalent, key selection criteria include thermal regulation behavior under load, NTC window programming method, ISET resistor tolerance impact on CC accuracy, and QFN-10 package thermal resistance (θJA = 50°C/W) for PCB layout validation.

Technical Context

The MP26029GQ-0000-P implements a fully autonomous three-phase charge profile: pre-charge (10% ICC, VBATT_PRE = 3.0V), constant-current (programmable 30mA–1A), and constant-voltage (4.2V ±0.5% over 0°C–50°C). Its internal linear pass transistor (RON_BATT = 530 mΩ in QFN-10) enables direct IN-to-BATT regulation without external diodes.

Thermal regulation operates via on-die temperature sensing: charge current reduces when junction temperature reaches 120°C (TJ_REG), and charging halts at 150°C (TJ_SHDN). Input voltage limit regulation activates when VIN drops to 4.5V (factory OTP default), preventing source collapse during high-current draw.

Key Specifications

Pinout & Package

MP26029GQ-0000-P is housed in a 10-pin QFN package (3mm × 3mm, 0.5mm pitch) with exposed thermal pad (EP) connected to GND for optimal heat dissipation. The package supports reflow soldering per JEDEC J-STD-020 and requires controlled thermal relief for EP pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ24075RGTR and TP4056, MP26029GQ-0000-P provides superior thermal management (120°C regulation + 50°C/W θJA), OTP-configurable parameters for design reuse, and input voltage limit regulation-making it optimal for compact, thermally constrained, and safety-aware portable systems.

Availability

MP26029GQ-0000-P is available at Aetrix Electronics and suitable for portable medical sensors, Bluetooth headsets, smart remote controls, and IoT asset trackers requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for MP26029GQ-0000-P 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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP26029 belongs to MPS's battery management IC product line, engineered specifically for space-constrained, thermally sensitive portable electronics needing autonomous, robust, and field-programmable single-cell Li-ion charging.

FAQ

What is the function of the STAT pin, and how should it be interfaced?

The STAT pin is an open-drain status indicator: pulled low during active charging, high-impedance (open) at completion, and blinking at 1Hz during faults (NTC, timer timeout, OVP). It requires an external pull-up resistor (typically 10kΩ to 3.3V or 5V) to generate logic-high signals. No current-limiting series resistor is needed, as the pin sinks up to 5mA when active.

How does input voltage limit regulation interact with the ISET-programmed charge current?

Input voltage limit regulation is independent of ISET setting: when VIN drops to the OTP-configured threshold (default 4.5V), the IC reduces charge current to prevent further VIN sag-even if ISET requests 1A. This preserves input source stability and avoids brownout in shared USB ports or weak AC adapters, while maintaining safe battery charging.

Can the MP26029GQ-0000-P charge batteries at voltages other than 4.2V?

Yes-the factory-default 4.2V battery regulation voltage is OTP-programmable to 3.6V, 3.8V, 4.1V, 4.3V, 4.35V, or 4.4V. This enables compatibility with LiFePO₄ (3.6V), high-voltage Li-ion (4.35V), or legacy chemistries. Programming requires MPS FAE support and OTP map configuration (bit 7–5 in OTP register).

What is the recommended PCB layout practice for the QFN-10 thermal pad?

The exposed thermal pad (Pin 10) must be soldered to a solid GND copper pour with ≥4 thermal vias (0.3mm diameter, spaced evenly) connecting to inner/ground planes. The pad area should match the package footprint (3mm × 3mm), and solder mask should be opened fully. Avoid splitting the pad or routing traces underneath it to ensure optimal thermal conduction and mechanical reliability.

Does the MP26029GQ-0000-P support charging from a 9V or 12V wall adapter?

Yes-it accepts input up to 13V, but thermal dissipation must be managed: at 12V input and 1A charge current, power dissipation exceeds 7W (P = (VIN – VBATT) × ICC ≈ (12 – 4.2) × 1 = 7.8W), far exceeding the QFN-10's 2.5W rating. Use only with reduced charge current (e.g., 300mA) or active cooling; for >6V inputs, consider switching chargers instead.

How is the NTC cold/hot window calibrated, and what thermistor values are supported?

The NTC window is calibrated using two external resistors (RT1, RT2) forming a voltage divider with the NTC thermistor. Equations (4) and (5) in the datasheet calculate RT1/RT2 based on RNTC_HOT and RNTC_COLD at target temperatures. The MP26029 supports standard NTCs (e.g., 10kΩ, 103AT) across -20°C to +60°C ranges; VCOLD/VHOT thresholds are fixed ratios of VIN (61.5%/28.5%), not absolute voltages.

Is the MP26029GQ-0000-P RoHS and REACH compliant?

Yes-MP26029GQ-0000-P is lead-free, halogen-free, and fully compliant with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. MPS confirms green status on its website under Quality Assurance, and the device carries the "Pb-Free" and "Halogen-Free" markings per J-STD-609.