Monolithic Power Systems Inc. MP2604DQ-LF-Z

Overview

MP2604DQ-LF-Z from Monolithic Power Systems is a single-cell linear Li-ion battery charger IC with integrated 28V input surge tolerance, programmable 85mA–1A constant-current charging, ±0.75% battery voltage regulation at 4.2V, and thermal/overvoltage/NTC-based battery temperature protection. It delivers charge status (CHG) and AC adapter power-good (ACOK) signals for portable electronics requiring compact, safe, and system-integrated charging.

For engineers reviewing the MP2604DQ-LF-Z datasheet, MP2604DQ-LF-Z pinout, MP2604DQ-LF-Z application, or MP2604DQ-LF-Z equivalent, this page provides verified functional identity, validated QFN10 package mapping, confirmed 10-pin terminal roles, real-world CC/CV charging behavior, and direct alternative part comparisons grounded in published electrical specifications and thermal shutdown thresholds.

Technical Context

The MP2604DQ-LF-Z implements a two-stage CC/CV charging algorithm with programmable termination current (IBF = 10–50% of ICHG) and proprietary auto-recharge triggered when VBATT drops ≥50mV below 4.2V. Its internal high-side pass transistor enables reverse current blocking (<1µA) and supports operation without a battery connected.

Input surge protection operates up to 28V, while OVP triggers at 7.0V (±0.3V hysteresis); ACOK asserts low only within 2.5–6.0V VIN range. Thermal protection engages at 120°C (±15°C) with 10°C hysteresis and modulates charge current into a saw-tooth waveform to limit junction temperature.

Key Specifications

Pinout & Package

MP2604DQ-LF-Z is housed in a 10-pin 3mm × 3mm QFN package with exposed thermal pad on underside, rated for –40°C to +85°C ambient operation. The package supports efficient PCB heat dissipation via soldered exposed pad and complies with JEDEC MO-229 VEED-5.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ24075RGTR and TP4056, MP2604DQ-LF-Z uniquely combines 28V surge tolerance, programmable IBF-based termination, integrated NTC monitoring, and dual-status signaling-making it suitable for certified portable electronics where safety, flexibility, and robustness are non-negotiable.

Availability

MP2604DQ-LF-Z is available at Aetrix Electronics and suitable for smartphones, digital cameras, MP3 players, and PDAs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2604DQ-LF-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 mixed-signal ICs for power management, motor drive, and interface applications.

The MP2604 belongs to MPS's battery charger product line, engineered specifically for space-constrained portable electronics needing integrated safety features, programmable charging parameters, and robust input handling without external protection components.

FAQ

What input voltage range does MP2604DQ-LF-Z support?

The MP2604DQ-LF-Z operates from 3.5V to 6.5V nominal input, with absolute maximum rating of 28V on the IN pin. It automatically disables charging when VIN falls below 2.5V or rises above 7.0V, and the ACOK pin indicates valid input (2.5–6.0V) via open-drain low assertion.

How is charge current programmed on MP2604DQ-LF-Z?

Charge current (ICHG) is set by connecting a resistor (RCHG) from the ISET pin to GND. Values from 1.65kΩ to 15kΩ yield 1A to 100mA respectively; for example, 3.3kΩ programs 500mA. The relationship is monotonic and documented in Table 1 of the datasheet.

Does MP2604DQ-LF-Z support trickle charge?

No. The MP2604DQ-LF-Z explicitly omits trickle charge functionality, as stated in its product title and datasheet description. It transitions directly from constant-current to constant-voltage mode and terminates charging when current drops to the programmed IBF threshold.

What thermal protection mechanism does MP2604DQ-LF-Z use?

It employs a proprietary soft thermal shutdown that modulates charge current into a saw-tooth waveform above 120°C (typical), reducing average current to limit junction temperature. Recovery occurs after cooling by ≥10°C hysteresis, avoiding abrupt shutdown/restart cycles.

Can MP2604DQ-LF-Z operate without a battery connected?

Yes. The IC starts up and remains stable with no battery attached to the BATT pin. It will not attempt charging and draws only 90µA standby current from VIN when EN is low, making it suitable for pre-production testing and battery-less system validation.

Is the exposed thermal pad on the QFN package required to be soldered?

Yes. The exposed pad is electrically connected to GND and serves as the primary thermal path. Per JEDEC MO-229 VEED-5, it must be soldered to a PCB copper pour using recommended land pattern dimensions (2.90mm × 2.90mm) for proper thermal performance and reliability.

How does the NTC interface work on MP2604DQ-LF-Z?

The NTC pin forms a resistive divider with internal references. With a 500kΩ pull-up to IN and a 100kΩ NTC to GND, the IC compares resulting voltage to thresholds corresponding to RNTC = 32.3kΩ (≈0°C) and 376.6kΩ (≈50°C); charging halts outside this window.