Monolithic Power Systems Inc. MPQ8632GL-10-P

Overview

MPQ8632GL-10-P from Monolithic Power Systems is a fully integrated 10A synchronous step-down DC/DC converter with Constant-On-Time (COT) control, operating from 2.5V–18V input and delivering adjustable 0.611V–13V output. It features non-latch over-voltage protection, 19.6mΩ high-side R_DS(ON), 5.7mΩ low-side R_DS(ON), and 200kHz–1MHz programmable switching frequency. Used in telecom base stations for point-of-load regulation where fast transient response and compact footprint are critical.

For engineers reviewing the MPQ8632GL-10-P datasheet, MPQ8632GL-10-P pinout, MPQ8632GL-10-P application, or MPQ8632GL-10-P equivalent, key selection criteria include its QFN-16 (3mm×4mm) package compatibility with 4A–12A variants, COT-based light-load efficiency in skip mode, and integrated PG signal with 2.5ms delay for system power sequencing validation.

Technical Context

The MPQ8632GL-10-P implements adaptive COT control without an external oscillator, using feed-forward compensation via the FREQ pin to maintain stable switching frequency across input voltage variation. Its internal 4.8V VCC LDO powers gate drivers, while bootstrap circuitry enables high-side MOSFET operation with minimal external components.

It integrates dual MOSFETs with matched on-resistance (19.6mΩ HS / 5.7mΩ LS at 25°C), supports pre-bias startup, and employs zero-current detection to enter discontinuous conduction mode (DCM) at light loads-reducing switching losses and improving efficiency below 10% load.

Key Specifications

Pinout & Package

MPQ8632GL-10-P uses a thermally enhanced 16-pin QFN package (3mm × 4mm, 0.5mm pitch) with exposed thermal pad. Pin 1 is EN; pins 9 and 14 are VIN; pins 10–13 are PGND; pins 15–16 are SW; pin 7 is VCC; pin 8 is BST; pin 3 is FB; pin 4 is SS; pin 5 is AGND; pin 6 is PG; pin 2 is FREQ.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ8632GLE-10, the -P suffix denotes production-grade packaging with enhanced traceability, while MPQ8632HGLE-10 introduces a safety-critical latch-OVP mode-making it unsuitable for applications requiring automatic recovery after transient overvoltage events.

Availability

MPQ8632GL-10-P is available at Aetrix Electronics and suitable for telecom base stations, server VRMs, and flat-panel display power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for MPQ8632GL-10-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 MPQ8632 family targets high-current, high-efficiency POL conversion in space-constrained applications such as networking infrastructure and computing platforms, emphasizing integration, thermal robustness, and transient performance.

FAQ

What is the maximum allowable input voltage for MPQ8632GL-10-P?

The absolute maximum input voltage is 21V, but the recommended operating range is 4.5V to 18V with internal bias or 2.5V to 18V when externally biased with 5V applied to VCC. Exceeding 21V risks permanent damage to the internal high-side MOSFET and gate driver circuitry.

Does MPQ8632GL-10-P support forced continuous conduction mode (FCCM)?

No-MPQ8632GL-10-P operates exclusively in automatic CCM/DCM transition mode. It lacks a MODE pin or external control to force CCM at light loads; instead, it enters skip mode below ~1A to maximize light-load efficiency, with no user-configurable FCCM option.

How is the switching frequency set, and what resistor value yields 500kHz?

Frequency is set by connecting a resistor (R_FREQ) between FREQ and VIN. For 500kHz at VIN = 12V, use R_FREQ ≈ 249kΩ per the formula F_SW(kHz) = 6.1 × 10⁶ / [R_FREQ(kΩ) × (V_IN – 0.4)]. The actual frequency remains stable across VIN variation due to feed-forward compensation.

Can MPQ8632GL-10-P be used with ceramic output capacitors only?

Yes-its COT control loop is inherently stable with low-ESR ceramic capacitors. Unlike voltage-mode controllers, it does not require ESR-based damping; typical designs use 22μF–100μF X7R/X5R ceramics per phase, eliminating electrolytic or POSCAP dependencies.

What is the purpose of the AGND and PGND separation in the pinout?

AGND provides a quiet reference for sensitive analog circuits (error amplifier, reference, comparators), while PGND handles high di/dt return currents from the power switches. Separating them prevents switching noise from modulating the feedback loop-critical for maintaining regulation accuracy and stability.

Is the thermal pad on the QFN package electrically connected?

Yes-the exposed thermal pad is internally connected to PGND and must be soldered to a dedicated PGND copper pour on the PCB. This connection provides both thermal dissipation (θ_JA = 46°C/W) and low-inductance grounding for high-frequency switch node currents.

Does MPQ8632GL-10-P support output voltage tracking?

No-MPQ8632GL-10-P lacks a dedicated TRACK pin or internal circuitry for voltage sequencing or tracking. Output voltage is set solely by the FB resistor divider; external tracking solutions (e.g., dedicated supervisor ICs) are required for multi-rail synchronization.