Monolithic Power Systems Inc. MP26029GTF-0000-Z

Overview

MP26029GTF-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, input voltage limit control (4.5V), and on-chip thermal regulation at 120°C. It integrates power MOSFETs, supports USB/AC adapter input (up to 13V), and implements NTC-based battery temperature monitoring for cold/hot window enforcement in portable power management systems.

For engineers reviewing the MP26029GTF-0000-Z datasheet, MP26029GTF-0000-Z pinout, MP26029GTF-0000-Z application, or MP26029GTF-0000-Z equivalent, key selection criteria include programmable charge current (30mA–1A via ISET resistor), thermal regulation threshold (120°C), input over-voltage protection (6.25V), safety timer (7 hours), and NTC fault response behavior.

Technical Context

The MP26029GTF-0000-Z implements a fully autonomous three-phase charging algorithm-pre-charge (10% ICC, VBATT_PRE = 3.0V), constant-current (programmable up to 1A), and constant-voltage (VBATT_REG = 4.2V ±0.5%)-with auto-recharge triggered at 200mV below regulation voltage. Its integrated IN-to-BATT MOSFET features 450mΩ on-resistance in SOT563 package and enables direct linear charging without external blocking diodes.

Thermal regulation operates independently of external circuitry: when junction temperature reaches 120°C, the IC dynamically reduces charge current to maintain die temperature; shutdown occurs at 150°C. Input voltage limit regulation activates when VIN drops to 4.5V, reducing ICC to prevent input collapse-critical for weak USB sources.

Key Specifications

Pinout & Package

MP26029GTF-0000-Z is housed in a 6-pin SOT563 package (1.6mm × 1.6mm, 0.5mm pitch) with exposed pad for thermal dissipation. The package supports compact layout in space-constrained portable devices and delivers 0.96W continuous power dissipation at +25°C ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ24075RGTR and TP4056, MP26029GTF-0000-Z uniquely combines OTP-programmable parameters, input voltage limit regulation, and on-die thermal regulation in a 6-pin SOT563-enabling reliable USB-powered charging in thermally constrained, safety-aware designs without firmware dependency.

Availability

MP26029GTF-0000-Z is available at Aetrix Electronics and suitable for smart handheld devices, Bluetooth headsets, and IoT sensor nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP26029GTF-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 across Asia and North America and global manufacturing partnerships.

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

FAQ

What is the function of the ISET pin beyond setting charge current?

The ISET pin serves dual roles: it sets fast-charge current via resistor-to-ground, and when left floating, it disables the entire charging function. This allows hardware-level enable/disable control without additional logic-ideal for systems requiring manual charge inhibition or battery removal detection.

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

When powered from a USB port, the MP26029GTF-0000-Z monitors VIN and reduces charge current if VIN drops to 4.5V-preventing input collapse caused by exceeding the port's current capability. This maintains stable operation even with low-current USB 2.0 hosts or long cables, avoiding system resets.

Can the NTC temperature thresholds be customized for non-standard battery chemistries?

Yes-the cold (VCOLD) and hot (VHOT) thresholds are defined as percentages of VIN (61.5% and 28.5%, respectively), and the external resistor divider values (RT1, RT2) can be recalculated for any NTC thermistor curve and target temperature window using Equations (4) and (5) in the datasheet.

What is the significance of the 120°C thermal regulation threshold versus 150°C shutdown?

The 120°C regulation point initiates progressive charge current reduction to hold junction temperature steady, enabling continued charging at lower current in thermally restricted environments. The 150°C shutdown is a final safety cutoff-ensuring permanent device protection if regulation fails or ambient exceeds design limits.

Is the STAT pin compatible with 1.8V or 3.3V logic systems?

Yes-STAT is an open-drain output requiring an external pull-up. It can interface with 1.8V, 3.3V, or 5V logic by connecting the pull-up to the appropriate rail; its low-state voltage is guaranteed ≤0.4V at 4mA sink, meeting standard CMOS input thresholds.

Does the MP26029GTF-0000-Z support battery voltage monitoring during system operation?

No-it lacks a dedicated battery voltage ADC or reporting interface. Its BATT pin connects directly to the cell; voltage sensing must be implemented externally via a resistor divider and MCU ADC if runtime monitoring is required.

How does the OTP configuration affect factory programming for volume orders?

The "0000" suffix indicates default OTP settings (4.2V regulation, 10% termination, 120°C thermal limit). For custom configurations (e.g., 4.35V for LiCoO₂), MPS assigns unique "xxxx" codes; Aetrix coordinates OTP programming during tape-and-reel fulfillment per customer specification.