Monolithic Power Systems Inc. MP2107DQ-LF-P

Overview

MP2107DQ-LF-P from Monolithic Power Systems is a 4A, 1.5MHz fixed-frequency synchronous step-down DC/DC regulator in a 3mm × 3mm QFN-10 package. It operates from 2.7V–6V input, delivers adjustable output down to 0.8V, integrates 80mΩ high-side and 60mΩ low-side MOSFETs, and supports frequency synchronization - used in FPGA core supplies and point-of-load regulation for telecom equipment.

For engineers reviewing the MP2107DQ-LF-P datasheet, MP2107DQ-LF-P pinout, MP2107DQ-LF-P application, or MP2107DQ-LF-P equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with functional differences, and supply support for industrial and embedded power designs.

Technical Context

The MP2107DQ-LF-P implements peak current-mode PWM control with internal Type II compensation, eliminating external loop components while enabling stable operation with all-ceramic output capacitors. Its transconductance gain of 11.25A/V links COMP voltage directly to inductor peak current, simplifying transient response tuning.

It features dual-function EN/SYNC pin supporting both enable logic (1.6V high threshold, 0.4V low) and external clock synchronization (1–2MHz), plus open-drain POK output with ±10% output window detection and 30μs deglitch timing - critical for system power sequencing and fault reporting.

Key Specifications

Pinout & Package

MP2107DQ-LF-P uses a thermally enhanced 3mm × 3mm QFN-10 package with exposed pad (connected to GND). The package supports ≤2.5W continuous power dissipation at +25°C ambient and has θ_JA = 50°C/W on 4-layer PCB.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous step-down regulator applications.

Compared with MP2107DQ-LF-P, MP2107ADN-LF-Z trades thermal performance and footprint for assembly flexibility, while RT7272BGJ6F sacrifices current rating and monitoring capability for higher frequency and lower BOM count - making MP2107DQ-LF-P optimal for compact, high-reliability 4A PoL designs requiring POK and sync.

Availability

MP2107DQ-LF-P is available at Aetrix Electronics and suitable for FPGA core supplies, telecom point-of-load regulation, and industrial embedded power management requiring stable component supply, RoHS compliance, and long-term lifecycle continuity.

Supply support for MP2107DQ-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 power ICs, with design centers across Asia and North America.

The MP2107 series belongs to MPS's high-density synchronous buck regulator product line, engineered for space-constrained, high-efficiency DC/DC conversion in computing, networking, and consumer electronics.

FAQ

What is the maximum recommended output current for MP2107DQ-LF-P under continuous operation?

The MP2107DQ-LF-P is rated for 4A continuous output current at TA = +25°C with proper PCB thermal design (4-layer board, exposed pad soldered to GND plane). Derating is required above +25°C ambient - at +85°C, max continuous current drops to ~2.8A due to thermal limits and junction temperature constraints (TJ ≤ 125°C).

Does MP2107DQ-LF-P require an external Schottky diode?

No - MP2107DQ-LF-P integrates synchronous rectification with 60mΩ low-side MOSFET, eliminating need for external Schottky diode. However, an external Schottky (e.g., B0530) is recommended near SW/GND for >2A loads to reduce voltage spikes and improve efficiency by ~0.5–1%.

How does the EN/SYNC pin function in synchronization mode?

In sync mode, EN/SYNC accepts 1–2MHz external clock signals. The internal oscillator locks to the rising edge of the applied clock; if any ON/OFF period exceeds 4μs, the IC interprets it as enable logic instead. Synchronization begins after detecting first few valid cycles, regardless of duty cycle.

What is the purpose of the BS (Bootstrap) pin, and what capacitor value is required?

The BS pin supplies gate drive voltage for the high-side MOSFET via a bootstrap capacitor tied between BS and SW. A 100nF X7R ceramic capacitor is required - placed as close as possible to BS/SW pins - to maintain sufficient gate voltage during high-duty-cycle operation and prevent shoot-through.

Can MP2107DQ-LF-P regulate output voltages below 0.8V?

No - the internal reference is fixed at 0.800V ±24mV, and the feedback architecture only supports outputs ≥0.8V. Attempting sub-0.8V regulation violates the error amplifier operating range and results in loss of regulation; minimum output is strictly 0.8V per datasheet specification.

Is thermal shutdown latched or auto-recovering?

Thermal shutdown is auto-recovering: when junction temperature exceeds 150°C, the IC disables switching and cools passively; once TJ falls below 130°C (20°C hysteresis), normal operation resumes automatically without requiring EN pin toggling or power cycle.

What is the minimum inductor value recommended for 4A operation?

A 0.47µH to 1.0µH shielded power inductor is recommended. For 4A load, peak inductor current reaches ~4.6A (30% ripple), so inductor saturation current must exceed 5.5A. DCR should be <10mΩ to maintain >93% efficiency at full load.