Monolithic Power Systems Inc. MP2212DQ-LF-P

Overview

MP2212DQ-LF-P from Monolithic Power Systems is a 600kHz fixed-frequency synchronous step-down DC/DC converter delivering up to 3A output current with input voltage range 3V–16V and adjustable output from 0.8V to 0.9×VIN. It integrates dual 80mΩ MOSFETs, supports ceramic output capacitors, and includes hiccup short-circuit protection, thermal shutdown, and frequency synchronization capability-used in FPGA core supplies and point-of-load regulation.

For engineers reviewing the MP2212DQ-LF-P datasheet, MP2212DQ-LF-P pinout, MP2212DQ-LF-P application, or MP2212DQ-LF-P equivalent, key selection criteria include its 3mm×3mm QFN-10 package, internal soft-start (120µs), peak-current-mode control architecture, and compatibility with 500kHz–2MHz external clock synchronization for EMI reduction.

Technical Context

The MP2212DQ-LF-P employs peak-current-mode PWM control with integrated Type II compensation, eliminating need for external compensation components. Its transconductance gain of 11.25A/V from COMP to output current simplifies loop stability across load and line variations.

It features dual UVLO thresholds (2.85V on IN, 2.8V on VCC) with hysteresis, cycle-by-cycle current limiting (6A high-side, 3A low-side), and bootstrap-driven high-side gate drive requiring external BST capacitor between BS and SW pins.

Key Specifications

Pinout & Package

MP2212DQ-LF-P uses a 3mm × 3mm, 10-lead QFN package with exposed thermal pad (connected to GND). Pin numbering follows JEDEC MO-229 VEED-5 standard; top marking "Z7" identifies the device.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP2212DN-LF-Z, the MP2212DQ-LF-P offers superior thermal performance in half the area; versus RT7272BGJ6F, it delivers plug-and-play stability and EMI mitigation via integrated sync and compensation - critical for high-density digital systems.

Availability

MP2212DQ-LF-P is available at Aetrix Electronics and suitable for FPGA core supplies, ASIC I/O rails, and network router point-of-load applications requiring stable component supply, RoHS-compliant packaging, and guaranteed long-term sourcing.

Supply support for MP2212DQ-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, headquartered in Kirkland, WA, with global design and support operations.

The MP2212 belongs to MPS's high-efficiency synchronous buck converter product line, designed specifically for space-constrained, thermally demanding embedded and communications applications requiring minimal external components and robust fault protection.

FAQ

What is the maximum allowable input voltage for MP2212DQ-LF-P?

The absolute maximum input voltage (IN to GND) is +18V, but the recommended operating range is 3V to 16V. Exceeding 16V may trigger internal UVLO hysteresis or cause premature thermal shutdown due to increased power dissipation in the 80mΩ MOSFETs. Operation above 16V voids parametric guarantees per datasheet Rev. 1.01.

Can MP2212DQ-LF-P operate with a pre-biased output?

Yes - the IC disables switching during startup if the FB pin senses a pre-biased output voltage higher than the internal soft-start ramp. It waits until the soft-start capacitor voltage exceeds the FB voltage before enabling regulation, preventing reverse current flow and ensuring safe hot-plug operation.

Is an external Schottky diode required for MP2212DQ-LF-P?

No external Schottky diode is required for ≤2A loads due to integrated synchronous rectification. However, the datasheet recommends adding one (e.g., B0530) close to SW/GND for >2A applications to reduce switching-node voltage spikes and improve efficiency by ~1–2% under heavy load.

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

When a 500kHz–2MHz square wave is applied to EN/SYNC, the internal oscillator locks to that frequency within one cycle. If any ON or OFF period exceeds 4µs, the signal is interpreted as an enable command instead - so clean, duty-cycle-stable clocks are essential for reliable sync operation.

What is the purpose of the BS pin and its required capacitor?

The BS pin supplies the floating gate drive voltage for the high-side N-channel MOSFET. A 100nF ceramic capacitor between BS and SW provides charge storage during low-side conduction, enabling full enhancement of the high-side switch. Incorrect BST capacitor value or placement causes erratic switching or failure to regulate.

Does MP2212DQ-LF-P support output voltages below 0.8V?

No - the internal feedback reference is fixed at 0.800V ±2%, and the minimum regulated output is 0.8V. The datasheet specifies output range as 0.8V to 0.9×VIN; attempting sub-0.8V regulation results in loss of feedback control and unregulated behavior.

What thermal derating applies at 85°C ambient temperature?

At TA = +85°C, maximum continuous power dissipation is PD(MAX) = (TJ(MAX) − TA)/θJA = (125°C − 85°C)/50°C/W = 0.8W. For 3A output at 5V, this limits usable VIN to ≤8.5V to stay within thermal limits - consult Figure 1's efficiency curves and thermal layout guidelines for full-load operation.