Monolithic Power Systems Inc. MP26023DQ-LF-Z

Overview

MP26023DQ-LF-Z from Monolithic Power Systems is a linear single-cell Li-ion battery charger IC with integrated 28V input surge tolerance, programmable 85mA–1A constant-current charging, 0.75% battery voltage regulation accuracy, and full-featured thermal/NTC/battery protection. It operates in trickle → CC → CV charge sequencing and delivers charge status (CHG) and AC adapter power-good (ACOK) signals for portable electronics power management.

For engineers reviewing the MP26023DQ-LF-Z datasheet, MP26023DQ-LF-Z pinout, MP26023DQ-LF-Z application, or MP26023DQ-LF-Z equivalent, key selection criteria include its 28V input surge rating, programmable IBF termination threshold, soft-start timing via external capacitor, NTC-based temperature monitoring range (0°C to 50°C), and QFN10 (3mm × 3mm) thermal performance with θJA = 50°C/W.

Technical Context

The MP26023 implements a linear charging architecture with proprietary auto-recharge CV loop control that maintains battery voltage at 4.20V ±15mV and reinitiates charging when VBATT drops below 4.15V. Its internal OVP triggers at VIN > 6.2V with 400mV hysteresis, and EN pin logic enables low-power disable (500µA standby).

Charge sequencing is fully autonomous: trickle mode activates below 3.0V (10% ICHG), transitions to CC mode at 3.0V, enters CV mode at 4.2V, and terminates when IBATT falls to user-programmed IBF (10–50% of ICHG). Thermal protection modulates current as a saw-tooth waveform above 120°C, with recovery hysteresis of 10°C.

Key Specifications

Pinout & Package

MP26023DQ-LF-Z uses a 10-pin QFN package (3mm × 3mm, 0.5mm pitch) with exposed thermal pad on underside for enhanced heat dissipation. Package thermal resistance is θJA = 50°C/W and θJC = 12°C/W on JEDEC-standard 4-layer PCB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ24040DRCT and TP4056, MP26023DQ-LF-Z provides superior system integration via programmable termination, built-in 28V surge immunity, dual open-drain status pins, and factory-trimmed 0.75% voltage accuracy-enabling robust, drop-in replacement in safety-compliant portable designs.

Availability

MP26023DQ-LF-Z is available at Aetrix Electronics and suitable for smartphones, digital cameras, MP3 players, and PDAs requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for MP26023DQ-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 power ICs, with design centers in the US, China, and Taiwan.

The MP260xx series targets portable electronics battery management, emphasizing integration, thermal resilience, and programmability to reduce external component count in space- and reliability-constrained applications.

FAQ

What is the maximum input voltage the MP26023DQ-LF-Z can withstand without damage?

The MP26023DQ-LF-Z features integrated input surge protection rated to 28V absolute maximum. This allows it to survive transient overvoltages common in automotive-accessory USB adapters or unregulated wall adapters without requiring external TVS diodes or regulators.

How is charge termination current (IBF) programmed on this IC?

IBF is set using a resistor (RBF) from the IBF pin to GND, where IBF = 1.7kΩ / RBF. Valid RBF values range from 2×RCHG to 10×RCHG, enabling termination thresholds from 10% to 50% of the programmed ICHG-critical for optimizing charge time versus battery longevity.

Does the MP26023DQ-LF-Z support battery temperature monitoring?

Yes-it includes a dedicated NTC pin (Pin 5) with an internal window comparator. When paired with a 100kΩ NTC thermistor, it disables charging if resistance falls outside 32.3kΩ–376.6kΩ, corresponding to a validated 0°C–50°C operating range per TH11-4H104F specification.

What is the purpose of the SS (Soft-Start) pin?

The SS pin connects to an external capacitor (e.g., 0.1µF) to control the ramp rate from trickle to full charge current. This limits inrush into depleted batteries, preventing voltage droop on shared input rails and reducing mechanical stress on battery electrodes during initial conditioning.

Can the MP26023DQ-LF-Z operate from a USB port without additional regulation?

Yes-it accepts 3.5V–5.5V directly, making it compatible with standard USB 2.0/3.0 ports. Its ACOK pin asserts low when VIN is within 2.5V–6.0V, allowing host systems to verify valid USB power presence before enabling charging.

What thermal protection mechanism does the MP26023DQ-LF-Z use?

It employs proprietary soft thermal shutdown: above 120°C, the charge current modulates as a saw-tooth waveform instead of cutting off entirely. This maintains partial charging while reducing average power dissipation, enabling graceful degradation rather than abrupt stoppage.

Is the MP26023DQ-LF-Z RoHS compliant and lead-free?

Yes-the "-LF" suffix confirms lead-free, RoHS-compliant packaging. The device meets JEDEC MSL3 moisture sensitivity level and is qualified for reflow soldering per IPC/JEDEC J-STD-020 standards.