Monolithic Power Systems Inc. MP2607DL-LF-P

Overview

MP2607DL-LF-P from Monolithic Power Systems is a fully autonomous linear Li-ion/Li-polymer battery charger IC with integrated system power path management. It supports dual-input selection (AC adapter or USB port), delivers up to 1.5 A programmable charge current, maintains ±0.75% CV voltage accuracy at 4.2 V, and features a 50 mΩ battery-to-system switch for instantaneous system power-up from deeply discharged batteries - used in portable handheld devices requiring simultaneous system operation and battery charging.

For engineers reviewing the MP2607DL-LF-P datasheet, MP2607DL-LF-P pinout, MP2607DL-LF-P application, or MP2607DL-LF-P equivalent, key selection criteria include input source selection logic (MODE pin), thermal fold-back threshold (105–135°C), programmable ICHG via external resistor (RCHG), end-of-charge current threshold (7–13% of ICHG), and power path behavior during system load surges exceeding input current limits.

Technical Context

The MP2607DL-LF-P implements a dual-path power architecture: an internal LDO regulates SYS from IN in AC mode (4.65–5.05 V), while a current-limited switch connects IN to SYS in USB mode (410–490 mA limit). Charging occurs via a P-channel FET (RON_BATT ≤ 400 mΩ) between IN and BATT, decoupling charge current from system load.

Power path control uses real-time arbitration: when ISYS + ICHG exceeds the input current limit, ICHG is reduced first; if SYS voltage drops below VBATT, a 50 mΩ N-channel switch (RON_BSW = 50–80 mΩ) engages to supplement system load from battery - enabling uninterrupted operation even with weak or current-limited sources.

Key Specifications

Pinout & Package

MP2607DL-LF-P is housed in a thermally enhanced QFN-14 package (3 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad. The package supports high-power dissipation (θJA = 40°C/W on 4-layer board) and enables compact layout in space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ24075RGTR and TP4056, MP2607DL-LF-P uniquely combines programmable charge current, hardware-enforced USB current limiting, and true power path arbitration - enabling smaller form factors, higher reliability under thermal load, and elimination of external current-sense or system power sequencing components.

Availability

MP2607DL-LF-P is available at Aetrix Electronics and suitable for smartphone power management, digital camera battery systems, handheld test equipment, and portable medical monitors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2607DL-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, motor drive, and automotive applications - with over 20 years of expertise in monolithic DC-DC conversion and battery solutions.

The MP2607 product line targets portable electronics requiring autonomous, space-efficient battery charging with zero-intervention power path control - designed specifically for applications where system uptime, battery health, and USB compliance must be guaranteed in a single chip.

FAQ

What is the maximum allowable input voltage for MP2607DL-LF-P, and how does overvoltage protection behave?

The absolute maximum input voltage is 13 V, but the device triggers overvoltage protection at 5.9 V in AC adapter mode and 6.27 V in USB mode. Recovery is automatic after input drops 260–310 mV below threshold. This allows use of unregulated 9 V or 12 V adapters while protecting internal circuitry from transient spikes without external TVS diodes.

How does MP2607DL-LF-P handle system load exceeding the USB current limit?

When ISYS exceeds 450 mA in USB mode, MP2607DL-LF-P first reduces or halts charging current. If SYS voltage then falls below VBATT, the 50 mΩ BATT-to-SYS switch activates to supplement load - maintaining SYS rail stability. This battery-supplement mode operates with constant-VDS control at low currents and transitions to constant-RDS at higher loads, preventing system reset.

Can MP2607DL-LF-P charge a battery while the system is powered off?

Yes - when CEB is pulled high (>2 V), the IN path and charger are disabled, but the BATT-to-SYS switch remains fully on, allowing battery to power SYS. However, charging is suspended. To charge while SYS is inactive, CEB must be low (<0.3 V) and a valid input source applied to IN; SYS can be left unconnected or lightly loaded.

What is the role of the TMR pin, and how is charge timeout calculated?

The TMR pin accepts an external capacitor (CTMR) to set a safety timeout - e.g., 1 µF yields 1.1 hours at 1 A ICHG. Timeout scales inversely with actual charging current, including reductions due to thermal fold-back or power path arbitration. The timer pauses when charging stops (e.g., during battery-supplement mode) and resets upon full charge, ensuring energy-based rather than time-based termination.

Does MP2607DL-LF-P support battery temperature monitoring, and how is it implemented?

Yes - the NTC pin interfaces with a resistor divider formed by the battery pack's NTC thermistor and two external resistors (RT1, RT2). MP2607DL-LF-P compares the resulting voltage against internal thresholds corresponding to user-defined high/low temperature limits. If out-of-range, charging halts immediately and STAT pins indicate "charge suspended", resuming automatically when temperature returns to safe bounds.

How accurate is the 4.2 V constant-voltage regulation, and over what conditions is it specified?

CV regulation accuracy is ±0.75% (4.179–4.221 V) at +25°C with zero battery load. Over –5°C to +75°C ambient and full load range, it degrades to ±0.83% (4.158–4.242 V). This specification includes process variation and temperature drift - critical for maximizing Li-ion cycle life and preventing overvoltage stress during field operation.

What happens to the SYS rail when the input source is removed during active charging?

Upon IN removal, MP2607DL-LF-P seamlessly transfers SYS supply from IN to BATT via the 50 mΩ switch - with no detectable dropout or glitch. The transition is hardware-controlled and occurs within microseconds, ensuring uninterrupted operation of connected processors, sensors, or displays. Battery voltage must exceed 2.3 V for this function to engage reliably.