Monolithic Power Systems Inc. MPQ4560DN-AEC1-LF-P

Overview

MPQ4560DN-AEC1-LF-P from Monolithic Power Systems is an AEC-Q100 qualified, asynchronous step-down DC/DC converter with integrated 250mΩ high-side MOSFET, delivering up to 2A output current across a 3.8V–55V input range and adjustable 0.8V–52V output. It operates at up to 2MHz switching frequency with current-mode control, 140μA quiescent current, and internal soft-start-designed for automotive power rails and industrial high-voltage point-of-load conversion.

For engineers reviewing the MPQ4560DN-AEC1-LF-P datasheet, MPQ4560DN-AEC1-LF-P pinout, MPQ4560DN-AEC1-LF-P application, or MPQ4560DN-AEC1-LF-P equivalent, key selection criteria include its AEC-Q100 qualification, 2MHz programmable frequency, 12µA shutdown current, thermal shutdown (150°C), and QFN10/SOIC8E package options-critical for automotive ECU, ADAS camera modules, and battery-backed industrial controllers.

Technical Context

The MPQ4560DN-AEC1-LF-P implements peak-current-mode PWM control with a dedicated COMP pin for loop compensation, enabling fast transient response and stable operation with ceramic output capacitors. Its internal 2.6V regulator powers all control circuitry across the full VIN range, while bootstrap charging relies on external BST–SW capacitance and diode placement for reliable high-side gate drive.

It features programmable frequency via FREQ pin resistor (RFREQ), frequency foldback during startup and short-circuit events, and precise 0.797V ±1.5% feedback reference (VFB) with 120µA/V error amplifier transconductance. The device enters pulse-skipping mode under light load to reduce switching losses, maintaining >90% efficiency down to 10mA load at 12V_IN/3.3V_OUT.

Key Specifications

Pinout & Package

MPQ4560DN-AEC1-LF-P is supplied in SOIC8E package (8-pin, 3.9mm × 4.9mm, 1.27mm pitch) with exposed pad for thermal enhancement. Pin functions are validated per Monolithic Power Systems Rev. 1.1 datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ4560DN-AEC1-LF-P, MPQ4572 offers higher current and ruggedness for future-proofing, while LM5164QPWPRQ1 trades current capacity for EMI mitigation-making MPQ4560 optimal for cost-sensitive, thermally constrained AEC-Q100 Grade 1 applications needing exactly 2A.

Availability

MPQ4560DN-AEC1-LF-P is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power supplies, and battery-backed telematics requiring stable component supply under AEC-Q100 compliance constraints.

Supply support for MPQ4560DN-AEC1-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 over two decades of leadership in DC/DC conversion and motor control solutions.

The MPQ4560 belongs to MPS's automotive-grade buck converter product line, engineered specifically for high-reliability, wide-input-voltage power conversion in engine compartments, ADAS subsystems, and industrial control cabinets.

FAQ

Is MPQ4560DN-AEC1-LF-P recommended for new designs?

No. Monolithic Power Systems explicitly states "NOT RECOMMENDED FOR NEW DESIGNS, REFER TO MPQ4572" in the datasheet. MPQ4572 is the designated successor with higher current capability, lower R_DS(ON), and extended input voltage rating-while maintaining pin and functional compatibility for seamless migration.

What is the maximum achievable output voltage with MPQ4560DN-AEC1-LF-P?

The device supports output voltages up to 52V, set by the FB resistive divider ratio. This is limited by the 55V absolute maximum input rating and internal 0.797V reference; for example, using R1 = 632kΩ and R2 = 10kΩ yields V_OUT = 0.797 × (1 + 632/10) ≈ 51.8V, verified in typical operating conditions.

Does MPQ4560DN-AEC1-LF-P require an external bootstrap diode?

An external bootstrap diode is optional but recommended when operating at 2MHz with high duty cycles (V_OUT/V_IN > 65%) or low input voltages (V_IN ≤ 5V). The internal bootstrap regulator may insufficiently charge the BST capacitor under these conditions, risking high-side gate drive failure.

How does frequency foldback improve startup reliability?

During startup, frequency foldback reduces switching frequency to prevent inductor current runaway before the output capacitor is fully charged. This limits peak switch current to ~50% of nominal ILIM, avoiding saturation and thermal stress-especially critical with large output capacitance or heavy pre-bias loads.

Can MPQ4560DN-AEC1-LF-P operate with ceramic output capacitors only?

Yes. Its current-mode architecture and internal compensation are optimized for ceramic capacitors. The datasheet confirms ceramic capacitor stability, and typical application circuits use 22µF X7R MLCCs without additional ESR components-reducing size, cost, and aging concerns versus tantalum or aluminum electrolytics.

What is the thermal resistance (θ_JA) for the SOIC8E package?

The SOIC8E package has θ_JA = 50°C/W on a standard 4-layer JEDEC board (JESD51-7). With 2.5W maximum power dissipation at T_A = 25°C, this yields a theoretical junction rise of 125°C-matching the +125°C max operating junction temperature. Layout with exposed pad grounding is essential to achieve this spec.

Is the 0.797V feedback reference trimmed at production?

Yes. The feedback voltage is trimmed to 0.797V ±1.5% over temperature (–40°C to +125°C), with typical value 0.797V at 25°C. This trimming ensures accurate output regulation across automotive temperature extremes without external calibration.