Monolithic Power Systems Inc. MP2617BGL-P

Overview

MP2617BGL-P from Monolithic Power Systems is a monolithic 3A synchronous buck switching charger IC with integrated NVDC (Narrow Voltage DC) power path management for single-cell Li-ion batteries. It delivers regulated SYS output voltage (4.08–4.4V programmable), supports dual-input USB/DC adapter (4–10V), and implements five independent control loops including input current limit (up to 3A), constant charge current (up to 3.025A), and thermal fold-back. It enables immediate system operation with deeply discharged or absent batteries in portable tablets and smartphones.

For engineers reviewing the MP2617BGL-P datasheet, MP2617BGL-P pinout, MP2617BGL-P application, or MP2617BGL-P equivalent, key selection considerations include its 4.2V fixed battery full-charge voltage, QFN-20 (3mm×4mm) package with exposed thermal pad, smart power path priority logic (system load > battery charge), and integrated ideal diode function enabling battery-to-system supplemental power during input overload or removal.

Technical Context

The MP2617BGL-P integrates a 1.6MHz fixed-frequency synchronous buck converter with internal high-side (130mΩ) and low-side (100mΩ) NMOS switches, eliminating external MOSFETs, blocking diodes, and sense resistors. Its NVDC architecture decouples SYS rail regulation from battery charging via independent feedback paths: SYSFB sets system output voltage, while ISET programs charge current and ILIM configures input current limit.

Five closed-loop controls operate concurrently: input current limit (programmable via M0/M1 pins or ILIM resistor), input voltage clamp (via VLIM pin), constant-current/constant-voltage battery charge (with 4.2V termination), battery terminal voltage regulation, and on-die thermal fold-back at 120°C. The device uses fixed off-time control for high duty-cycle operation near VIN ≈ VSYS and includes built-in trickle charge, NTC monitoring, and programmable safety timer.

Key Specifications

Pinout & Package

MP2617BGL-P is housed in a thermally enhanced QFN-20 package (3mm × 4mm, 0.5mm pitch) with an exposed thermal pad on the bottom for PCB-level heat sinking. Pin numbering follows standard top-view orientation with Pin 1 at top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ25611DRTWR and IP2326, MP2617BGL-P offers superior integration for pin-strapped, thermally constrained portable devices-delivering programmable SYS voltage, input voltage clamping, and full five-loop regulation without MCU dependency or feature trade-offs.

Availability

MP2617BGL-P is available at Aetrix Electronics and suitable for tablet PC, smartphone, e-book reader, and portable media player designs requiring stable component supply, consistent thermal performance, and long-term lifecycle support in high-volume consumer electronics production.

Supply support for MP2617BGL-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 core expertise in DC-DC conversion, battery management, and motor control solutions.

The MP2617 series belongs to MPS's portable battery charger product line, designed specifically for space-constrained, dual-input (USB + adapter) consumer devices requiring robust NVDC power path management and high integration density.

FAQ

What is the difference between MP2617A and MP2617B?

The primary distinction lies in battery full-charge voltage: MP2617A terminates at 4.35V, while MP2617B uses 4.2V-making MP2617B compatible with standard Li-ion cells without overvoltage risk. Additionally, MP2617B's programmable SYS voltage range is 4.08V–4.4V versus MP2617A's 4.22V–4.63V, aligning with typical system rail requirements.

How does the NVDC power path manage system load priority?

When input current reaches its programmed limit, the MP2617BGL-P first satisfies the system load demand on the SYS rail. Only residual current is allocated to battery charging. If system load exceeds input capacity, the internal 40mΩ BATT-to-SYS MOSFET turns on, allowing battery to supplement power-ensuring uninterrupted SYS operation without brownout.

Can MP2617BGL-P operate without an external inductor?

No. The device requires an external 1.2µH power inductor connected between SW and the input/output filter capacitors. The internal synchronous buck controller relies on this inductor for energy storage and transfer; omission would prevent regulation and likely cause immediate fault or damage.

What happens if the NTC thermistor is disconnected?

If the NTC pin is left floating or open-circuited, the device interprets it as an out-of-range temperature condition and suspends charging. This is a safety lockout per JEITA guidelines-charging resumes only when a valid thermistor network (e.g., NCP18XH103F) is reconnected and reports temperature within 0°C–50°C.

Is the MP2617BGL-P RoHS and halogen-free compliant?

Yes. MP2617BGL-P is lead-free, halogen-free, and fully compliant with the EU RoHS directive. All packaging materials and die attach compounds meet MPS's green manufacturing standards, as verified and published on the Monolithic Power Systems quality assurance website.

How is input current limit set in USB mode?

In USB mode, the MP2617BGL-P ignores the ILIM resistor and instead uses internal logic: M0/M1 pin states determine fixed limits-Low/Low = 450mA (USB2.0), Low/High = 825mA (USB3.0). When both pins float (default), it operates at 2A, but this setting is invalid for USB compliance and intended for DC adapter use only.

Does MP2617BGL-P support reverse current blocking from SYS to IN?

Yes. When VIN = 0V and SYS = 4.5V, the device blocks reverse current with leakage <0.2µA-achieved via internal high-side NMOS gate control. This prevents battery or SYS rail discharge back into a disconnected or failed input source, protecting both power sources.