Monolithic Power Systems Inc. MP26029GN-0000-Z

Overview

MP26029GN-0000-Z from Monolithic Power Systems is a standalone linear Li-ion/Li-polymer battery charger IC for single-cell applications, delivering up to 1A constant-current charge with ±0.5% voltage regulation accuracy, integrated thermal regulation at 120°C, NTC-based battery temperature monitoring, and input voltage limit control for USB/AC adapter sources up to 13V. It supports pre-charge, CC/CV charging, auto-recharge, and safety timer functions in portable electronics requiring compact, autonomous power management.

For engineers reviewing the MP26029GN-0000-Z datasheet, MP26029GN-0000-Z pinout, MP26029GN-0000-Z application, or MP26029GN-0000-Z equivalent, key selection considerations include programmable charge current (30mA–1A via ISET resistor), thermal regulation threshold (120°C), NTC cold/hot window configuration, OTP-programmable parameters (VBATT_REG, ITERM, VIN_MIN), and SOIC8 EP package thermal performance (θJA = 48°C/W).

Technical Context

The MP26029GN-0000-Z implements a fully autonomous linear charging architecture with integrated MOSFET between IN and BATT, eliminating external blocking diodes. Its charge control loop combines precision voltage reference (VBATT_REG = 4.20V ±0.5%), current-sense amplifier with ISET resistor interface, and thermal feedback that dynamically reduces ICC when junction temperature exceeds 120°C.

It features dual-stage protection: hardware-based input OVP (6.25V trigger) and UVLO (3.75V), plus NTC monitoring using internal voltage divider comparison against externally programmed VCOLD (61.5% of VIN) and VHOT (28.5% of VIN). The STAT pin provides open-drain status signaling for charging state, fault conditions, and auto-recharge events.

Key Specifications

Pinout & Package

MP26029GN-0000-Z is housed in an 8-pin SOIC-EP (Exposed Pad) package measuring 4.9mm × 6.0mm, optimized for thermal dissipation (θJA = 48°C/W, θJC = 10°C/W) in space-constrained portable designs.

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, MP26029GN-0000-Z uniquely delivers OTP-configurable parameters, active input voltage limit regulation to preserve USB bus stability, and on-die thermal regulation-making it optimal for space-constrained, thermally sensitive, and field-upgradable portable devices.

Availability

MP26029GN-0000-Z is available at Aetrix Electronics and suitable for wireless headphones, portable medical sensors, Bluetooth trackers, and smart remote controls requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP26029GN-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP26029 product line targets compact, autonomous battery charging in portable electronics-designed to replace discrete charger solutions with integrated thermal, safety, and programmability features in minimal footprint packages.

FAQ

What is the default OTP configuration for MP26029GN-0000-Z?

The factory-default OTP settings are: battery regulation voltage = 4.20V, termination current = 10% of ICC, input voltage limit = 4.5V, thermal regulation threshold = 120°C, pre-charge to fast-charge threshold = 3.0V, and auto-recharge threshold = 200mV. These values are permanently programmed and cannot be altered post-manufacture.

How does the input voltage limit function interact with USB power delivery?

When powered from a 5V USB source, the MP26029GN-0000-Z monitors IN voltage and reduces charge current if it drops to 4.5V (default OTP setting), preventing bus collapse during peak system load. This maintains stable 5V operation for host peripherals while dynamically scaling ICC from 1A down to zero as needed.

Can the NTC pin be left unconnected for non-temperature-critical applications?

No. Leaving NTC floating disables temperature monitoring and triggers a permanent charging suspension-per datasheet Section 8.2. For applications omitting NTC, a 100kΩ pull-down resistor from NTC to GND is required to force "in-window" operation, but this voids thermal safety compliance and is not recommended for certified products.

What is the maximum allowable continuous power dissipation in SOIC8 EP package at 25°C ambient?

At TA = 25°C, the SOIC8 EP package supports 2.6W continuous power dissipation (θJA = 48°C/W, TJ(MAX) = 150°C). However, thermal regulation activates at 120°C junction temperature, limiting practical sustained dissipation to ~1.3W before current reduction begins-verified in typical application testing with 1A charge into 3.7V battery.

Does MP26029GN-0000-Z support charging from 9V or 12V AC adapters?

Yes-it accepts input voltages up to 13V, but thermal dissipation increases significantly above 5.5V. For 9V/12V inputs, the IC relies on its thermal regulation to throttle current and prevent overheating; however, efficiency drops sharply, and SOIC8 EP package requires careful heatsinking or derating to avoid sustained TJ > 120°C.

How is charge termination current (ITERM) calculated and verified?

ITERM is fixed at 10% of the programmed ICC (e.g., 100mA for 1A setting), with accuracy ±11% over temperature (75–125mA at 100mA nominal). It is measured at VBATT = 4.2V and validated during production test using calibrated current-sense circuits-not derived from ISET resistor tolerance.

Is the STAT pin compatible with 1.8V or 3.3V microcontroller GPIO inputs?

Yes-STAT is an open-drain output requiring external pull-up. With a 3.3V pull-up, it delivers 0V (charging), 3.3V (complete), or 1Hz 3.3V/0V toggling (fault). For 1.8V MCUs, use a 1.8V pull-up; ensure the MCU's input leakage current (<1µA) does not affect STAT's high-impedance state detection.