Monolithic Power Systems Inc. MPQ8636GVE-20-P

Overview

MPQ8636GVE-20-P from Monolithic Power Systems is a fully integrated, synchronous step-down DC/DC converter delivering up to 20A output current with 4.5V–18V input range, 0.611V–13V adjustable output, non-latch over-voltage protection, and Constant-On-Time (COT) control for ultrafast transient response in telecom base stations and server power rails.

For engineers reviewing the MPQ8636GVE-20-P datasheet, MPQ8636GVE-20-P pinout, MPQ8636GVE-20-P application, or MPQ8636GVE-20-P equivalent, this page delivers verified package mapping (QFN-5×4mm, 29-pin), confirmed thermal shutdown at 150°C, validated soft-start programmability via external capacitor, and real-world OVP threshold of 130% V_FB - all critical for high-current POL design validation.

Technical Context

The MPQ8636GVE-20-P implements adaptive COT control without an external oscillator, using the FREQ pin's resistor-to-IN connection for feed-forward stabilized switching frequency (200kHz–1MHz). Its dual-MOSFET power stage integrates 9.9mΩ high-side and 2.4mΩ low-side R_DS(ON) at 25°C to minimize conduction loss at 20A continuous load.

It features a dedicated analog ground (AGND) separate from PGND, open-drain power-good signaling with 2ms delay and 91%–94% rising threshold, and internal 5V VCC LDO decoupled via ≥1µF ceramic capacitor - all optimized for noise-sensitive, high-density server VRM layouts.

Key Specifications

Pinout & Package

MPQ8636GVE-20-P is housed in a thermally enhanced 29-pin QFN package measuring 5mm × 4mm with exposed thermal pad (EP). The layout separates AGND (pin 5) from PGND (pins 10–14, 19–23) and dedicates multiple parallel SW (pins 15–18, 25–29) and IN (pins 9, 24) terminals to minimize current density and PCB trace resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ8636HGLE-10, the MPQ8636GVE-20-P delivers double the current in a thermally superior 5×4mm package with non-latch OVP, while RTQ2132BGQW adds digital control at the cost of increased BOM count and layout complexity.

Availability

MPQ8636GVE-20-P is available at Aetrix Electronics and suitable for telecom base stations, AI accelerator servers, and distributed industrial power systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MPQ8636GVE-20-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 innovation in DC/DC conversion, motor drivers, and LED lighting controllers.

The MPQ8636 product line targets high-current, high-efficiency point-of-load regulation in space-constrained infrastructure equipment, emphasizing integration, thermal robustness, and transient performance without external loop compensation.

FAQ

What is the maximum recommended PCB copper weight for MPQ8636GVE-20-P IN and SW traces?

For reliable 20A operation, IN and SW traces should use ≥2oz (70µm) copper with minimum 3mm width and thermal vias to inner-layer ground planes. The datasheet specifies 3.3W power dissipation at 25°C ambient, requiring low-impedance paths to limit temperature rise below 40°C above ambient.

Does MPQ8636GVE-20-P support forced PWM mode or only CCM operation?

The MPQ8636GVE-20-P operates exclusively in continuous conduction mode (CCM) with adaptive Constant-On-Time control. It does not support forced PWM or discontinuous conduction mode (DCM); light-load efficiency is maintained via reduced switching frequency rather than pulse-skipping.

Can the soft-start time be adjusted independently of output voltage setting?

Yes - soft-start time is set solely by the capacitor value on the SS pin and is independent of the FB resistor divider. A 33nF capacitor yields ~5ms ramp time; doubling capacitance doubles ramp duration, enabling precise control of inrush current without affecting regulation accuracy.

What is the minimum output capacitor ESR required for stable operation with ceramic capacitors?

When using low-ESR ceramic output capacitors, an external ramp compensation network (R4/C4) is mandatory. The datasheet specifies that the V_FB descending slope must exceed 10mV/ns; stability is achieved by selecting R4 and C4 per Equation 7 to ensure sufficient artificial ripple slope.

Is the power-good signal asserted before or after the soft-start completion?

The PG signal asserts HIGH only after the output voltage reaches ≥91% of the target value and remains stable for ≥2ms - meaning it occurs after soft-start completion and confirms both regulation and transient settling, not just voltage ramp crossing.

How does the non-latch OVP behave during a sustained overvoltage event?

During sustained overvoltage, the MPQ8636GVE-20-P disables switching and holds the output in a high-impedance state until the fault clears. Once V_OUT drops below 117% V_FB, the device automatically resumes normal operation without requiring EN toggling or power cycle.

What is the thermal pad soldering requirement for the QFN-5×4mm package?

The exposed thermal pad must be soldered to a solid copper pour connected to PGND with ≥9 thermal vias (0.3mm diameter, 0.5mm pitch). Insufficient thermal via count increases θ_JA beyond the rated 38°C/W, risking thermal shutdown under full 20A load at elevated ambient temperatures.