Monolithic Power Systems Inc. MP26058DQ-LF-P

Overview

MP26058DQ-LF-P from Monolithic Power Systems is a linear single-cell Li-ion/Li-polymer battery charger IC with integrated 28V surge tolerance, programmable 200mA–1A CC/CV charging, LDO mode for system power-up without battery, and thermal/NTC/timer safety protections. It operates from 2.8V–7V input and delivers ±0.75% battery voltage regulation at 4.2V.

For engineers reviewing the MP26058DQ-LF-P datasheet, MP26058DQ-LF-P pinout, MP26058DQ-LF-P application, or MP26058DQ-LF-P equivalent, key selection criteria include its 3mm × 3mm QFN10 package, 125µA VIN standby current, 1µA battery reverse leakage, soft-start inrush control, and dual-indicator open-drain CHG/ACOK pins for real-time status monitoring.

Technical Context

The MP26058 implements a two-stage linear charge algorithm: constant-current (CC) phase until VBATT reaches 4.2V, then transitions to LDO mode with current tapering to programmed IBF threshold (10–50% of ICHG). Charging terminates after 262,144 internal oscillator cycles if IBF is not met.

Its thermal protection uses die-temperature sensing with soft shutdown at 105–135°C and 10°C hysteresis, while NTC monitoring supports 0°C–50°C valid range via external 100kΩ thermistor. Input OVP clamps at 7V with 400mV hysteresis, and UVLO disables operation below 2.2V.

Key Specifications

Pinout & Package

MP26058DQ-LF-P is housed in a 10-pin 3mm × 3mm QFN package with exposed thermal pad (Pin 5), rated for –40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ24075RGTR and TP4056, MP26058DQ-LF-P provides unique 28V surge tolerance, programmable termination current, and true LDO-mode system power delivery-enabling safer, more flexible integration in cost-sensitive portable electronics without external protection circuitry.

Availability

MP26058DQ-LF-P is available at Aetrix Electronics and suitable for smartphones, digital cameras, PDAs, and MP3 players requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for MP26058DQ-LF-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 across Asia and North America.

The MP26058 belongs to MPS's battery management product line, engineered specifically for compact, cost-sensitive portable electronics requiring integrated safety, wide-input tolerance, and battery-less system operation.

FAQ

What is the maximum allowable input voltage for continuous operation?

The MP26058DQ-LF-P operates continuously within 2.8V–7.0V input range. Its absolute maximum rating is +28V, which applies only to transient surges-not steady-state conditions. Sustained input above 7.0V triggers overvoltage protection and disables charging, with ACOK pin floating to indicate fault.

How does the LDO mode function when no battery is connected?

In LDO mode with no battery, the MP26058DQ-LF-P regulates BATT pin to 4.2V using internal pass element, sourcing up to 1A to power downstream system loads directly from VIN. This enables "battery-less boot" functionality critical for field service or firmware recovery scenarios.

Can the timer be disabled, and how is it implemented?

Yes-the timer is disabled by shorting the TMR pin to GND. When active, it counts 262,144 internal oscillator cycles (≈13 hours at 5Hz) before terminating charge if battery full condition is unmet. Disabling it removes time-based termination but retains all other safety features.

What NTC thermistor values trigger charge inhibition?

Charge stops if the NTC resistance at Pin 9 falls outside 32.3kΩ (corresponding to 50°C) to 376.6kΩ (corresponding to 0°C) when using TH11-4H104F (100kΩ @ 25°C). This enforces a validated 0°C–50°C charging window without software or external ADC.

Is the MP26058DQ-LF-P compatible with USB Type-C power sources?

Yes-its 2.8V–7.0V input range and 7V OVP align with USB Type-C default 5V and programmable 9V/12V profiles. The 28V surge rating protects against hot-plug transients, and CHG/ACOK pins provide direct status feedback to USB controller firmware without additional logic.

What is the minimum recommended PCB copper area for thermal relief?

MPS specifies θJA = 50°C/W on a JEDEC 51-7 4-layer board. To maintain TJ ≤120°C at 1A charge into a 3.5V battery (≈1.5W dissipation), ≥250mm² of 2oz copper connected to the exposed pad is recommended-verified in typical application layout Figure 1 of Rev. 0.92 datasheet.

Does the device support battery presence detection?

No-MP26058DQ-LF-P lacks dedicated battery detect circuitry. Presence is inferred indirectly: if BATT pin voltage remains near 0V while VIN is valid and SHDN is asserted, no battery is connected. System-level detection requires external voltage comparator or MCU ADC monitoring.