Monolithic Power Systems Inc. MPQ8632GVE-15-P

Overview

MPQ8632GVE-15-P from Monolithic Power Systems is a fully integrated 15A synchronous step-down DC/DC converter with 2.5V–18V input range, Constant-On-Time (COT) control, non-latch over-voltage protection, and 0.611V–13V adjustable output voltage. It delivers high efficiency in telecom base stations and server power rails where compact size, fast transient response, and thermal robustness are critical.

For engineers reviewing the MPQ8632GVE-15-P datasheet, MPQ8632GVE-15-P pinout, MPQ8632GVE-15-P application, or MPQ8632GVE-15-P equivalent, key selection factors include its 9.9 mΩ high-side R_DS(ON), 3 mΩ low-side R_DS(ON), 29-pin QFN 5mm×4mm package, programmable 200kHz–1MHz switching frequency, and adaptive COT architecture enabling ultrafast load-step response without external compensation.

Technical Context

The MPQ8632GVE-15-P implements adaptive Constant-On-Time (COT) control using an internal one-shot timer whose on-time is set by an external resistor on the FREQ pin and modulated by VIN feed-forward-ensuring stable switching frequency across input voltage variation. Its dual-MOSFET power stage integrates optimized 9.9 mΩ/3 mΩ R_DS(ON) devices for minimal conduction loss at 15A continuous output.

Operation spans continuous-conduction mode (CCM) under heavy load and discontinuous-conduction mode (DCM) with tri-state low-side gate drive and current modulation at light load-enabling high efficiency down to milliamp loads. Protection includes non-latch OCP (15–25A peak), OVP (130% V_FB latch threshold), UVP, and thermal shutdown at 150°C with 25°C hysteresis.

Key Specifications

Pinout & Package

MPQ8632GVE-15-P uses a thermally enhanced 29-pin QFN package (5mm × 4mm, 0.5mm pitch) with exposed thermal pad. The layout features multiple IN, PGND, and SW pins to reduce current density and parasitic inductance-critical for stable 15A operation and EMI control.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ8632GVE-20, the MPQ8632GVE-15-P offers tighter thermal budget control and lower gate-drive power at 15A, while RTQ2132BGQW trades flexibility and efficiency for compactness and simplified layout-making MPQ8632GVE-15-P optimal for performance-driven 15A POL applications.

Availability

MPQ8632GVE-15-P is available at Aetrix Electronics and suitable for telecom base stations, server power supplies, and distributed industrial power systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MPQ8632GVE-15-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 expertise in DC/DC conversion, motor drivers, and LED lighting controllers.

The MPQ8632 family targets high-current, high-efficiency point-of-load applications in networking, computing, and industrial equipment-designed to replace multi-component solutions with single-chip integration and adaptive control.

FAQ

What is the minimum recommended input voltage for MPQ8632GVE-15-P?

The MPQ8632GVE-15-P supports 2.5V minimum input only when a 5V external bias is applied to the VCC pin; otherwise, the internal 4.8V LDO requires ≥4.5V on VIN to operate. This dual-bias capability enables use in low-voltage intermediate bus architectures while maintaining gate drive integrity.

How does the FREQ pin set switching frequency?

The FREQ pin connects to VIN through an external resistor (RFREQ) to program the one-shot on-time per cycle. With VIN feed-forward, the resulting frequency remains nearly constant across input voltage variation-e.g., RFREQ = 453kΩ yields ~500kHz at 12V input and maintains ±3% stability from 4.5V to 18V.

Can MPQ8632GVE-15-P start into a pre-biased output?

Yes-the device supports pre-bias start-up by disabling low-side MOSFET turn-on until the high-side switch begins regulating. This prevents reverse current flow into a charged output capacitor, protecting downstream components and ensuring clean power-up in hot-swap or redundant supply configurations.

What thermal performance can be expected in a standard 4-layer PCB?

On a JEDEC-standard 4-layer board (2 oz Cu, 1-in² thermal pad), the MPQ8632GVE-15-P achieves θ_JA = 38°C/W and θ_JC = 6°C/W. At 15A/12V input/1.0V output, typical power dissipation is ~2.1W, resulting in ~80°C junction rise above ambient-well below the 150°C shutdown threshold.

Is the power-good (PG) signal compatible with 3.3V logic systems?

Yes-the open-drain PG pin is rated for 6V max and sinks ≥12mA at 600mV, allowing direct interface with 3.3V microcontrollers using a 100kΩ pull-up. A 10nF capacitor to PGND is recommended when pull-up resistance is <100kΩ to suppress noise-induced false triggers.

Does MPQ8632GVE-15-P require external bootstrap diode?

No-the device integrates a bootstrap diode and relies solely on the BST-to-SW ceramic capacitor (typically 0.1µF X7R). This eliminates discrete diode placement and associated parasitics, simplifying layout and improving reliability in high-frequency, high-current operation.

How is over-voltage protection implemented?

OVP uses the FB pin to monitor output voltage via the same resistor divider. When V_FB exceeds 130% of the reference (797mV at 0.611V setpoint), the device latches off the high-side MOSFET and asserts PG low-non-latch recovery occurs after fault removal and EN re-assertion or input cycle.