Monolithic Power Systems Inc. MP2606DQ-LF-P

Overview

MP2606DQ-LF-P from Monolithic Power Systems is a single-cell linear Li-ion battery charger IC with integrated 28V input surge protection, programmable 85mA–1A constant-current charging, ±0.75% battery voltage regulation at 4.2V, thermal shutdown (105–135°C), and reverse current blocking (<1µA). It delivers charge status (CHG) and AC adapter power-good (ACOK) signals for portable electronics requiring compact, robust, and accurate battery management.

For engineers reviewing the MP2606DQ-LF-P datasheet, MP2606DQ-LF-P pinout, MP2606DQ-LF-P application, or MP2606DQ-LF-P equivalent, key selection criteria include its 3mm × 3mm QFN10 package, absence of trickle charge, programmable IBFL/IBFH thresholds for precise full-charge detection, soft-start timing control via external capacitor, and operation across –40°C to +85°C ambient.

Technical Context

The MP2606DQ-LF-P implements a two-stage CC/CV charging algorithm: constant-current mode up to 1A (set by R_CHG on ISET pin), transitioning to constant-voltage regulation at 4.2V ±0.75%. Battery full detection occurs when charge current falls to a user-programmed IBFL threshold (10–50% of ICHG), followed by auto-recharge when VBATT drops below 4.15V.

It integrates high-side NMOS pass transistor control with proprietary overvoltage protection (OVP) that forces 0µA charge current if VBATT exceeds 4.25V, and features dual open-drain indicators-CHG (low during active charge) and ACOK (low when VIN ∈ [2.5V, 7.0V])-for system-level power sequencing and status monitoring.

Key Specifications

Pinout & Package

MP2606DQ-LF-P is housed in a thermally enhanced 10-pin 3mm × 3mm QFN package with exposed thermal pad on underside. The package supports JEDEC MO-229 VEED-5 footprint and provides θ_JA = 50°C/W on 1"² 1oz copper.

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 TP4056 and BQ24075, MP2606DQ-LF-P offers superior input surge resilience (28V), tighter voltage regulation (±0.75%), and dedicated hysteresis control (IBFH) - critical for long-term battery health in consumer portables where adapter quality varies.

Availability

MP2606DQ-LF-P is available at Aetrix Electronics and suitable for smartphones, digital cameras, MP3 players, and PDAs requiring stable component supply, consistent parametric performance, and RoHS-compliant packaging.

Supply support for MP2606DQ-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 mixed-signal ICs for power management, motion control, and automotive applications.

The MP2606 product line targets compact, cost-effective linear Li-ion chargers for consumer electronics, emphasizing integration of surge protection, precision regulation, and system interface signals in minimal footprint.

FAQ

What is the maximum input voltage the MP2606DQ-LF-P can withstand without damage?

The MP2606DQ-LF-P has an absolute maximum IN-to-GND rating of +28V, meaning it can survive short-duration transients up to this level without external protection. Continuous operation is limited to 3.5V–6.5V, and the ACOK pin asserts valid input only between 2.5V and 7.0V.

Does MP2606DQ-LF-P support trickle charge for deeply discharged batteries?

No. The MP2606DQ-LF-P explicitly omits trickle charge functionality per its product description and datasheet title ("without Trickle Charge"). It initiates constant-current charging immediately upon enable if VBATT is below 4.2V, with no pre-conditioning stage.

How is the 4.2V battery regulation voltage trimmed and how stable is it over temperature?

The 4.2V reference is laser-trimmed during production and specified at ±0.75% (±31.5mV) over –5°C to +75°C. At full temperature range (–40°C to +85°C), regulation remains within ±0.85% (±35.7mV), ensuring compliance with standard Li-ion termination requirements.

Can MP2606DQ-LF-P operate without a battery connected to the BATT pin?

Yes. The datasheet confirms stable operation with no battery attached. In this condition, the IC regulates the BATT pin at 4.2V and draws only 90µA from VIN in standby, making it suitable for pre-charge testing or systems with hot-swap battery interfaces.

What is the purpose of the IBFH pin and how does it differ from IBFL?

IBFH sets the hysteresis threshold for auto-recharge: when VBATT falls below (4.2V – 50mV), the charger restarts CC mode. IBFL sets the CV-mode termination current (e.g., 10% of ICHG). IBFH uses a resistor divider (RBFL//RCHG), while IBFL uses a single resistor (RBFL) to GND - enabling independent tuning of cutoff and re-engage points.

Is thermal shutdown reversible, and how does the IC behave during thermal foldback?

Yes. Thermal shutdown is fully reversible: once die temperature falls below hysteresis (typically 10°C below trip point), normal CC/CV operation resumes. During thermal foldback, the charge current becomes a sawtooth waveform - reducing average current while preserving regulation - rather than halting entirely.

What package variant does MP2606DQ-LF-P correspond to, and what is its RoHS status?

MP2606DQ-LF-P denotes the QFN10 (3mm × 3mm) package with lead-free (LF) finish and tape-and-reel packaging (implied by "-P" suffix per MPS naming convention). It complies with RoHS Directive 2011/65/EU and JEDEC moisture sensitivity level MSL3.