Monolithic Power Systems Inc. MPQ8632HGL-10-Z

Overview

MPQ8632HGL-10-Z from Monolithic Power Systems is a fully integrated 10A synchronous step-down 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 power supplies, server VRMs, and flat-panel display bias rails using internal 19.6mΩ/5.7mΩ MOSFETs and a 3mm×4mm QFN package.

For engineers reviewing the MPQ8632HGL-10-Z datasheet, MPQ8632HGL-10-Z pinout, MPQ8632HGL-10-Z application, or MPQ8632HGL-10-Z equivalent, key selection criteria include its 10A continuous output rating, non-latch OVP mode, programmable 200kHz–1MHz switching frequency via external resistor, and compatibility with pre-bias startup and soft-start timing control.

Technical Context

The MPQ8632HGL-10-Z implements adaptive COT control with feed-forward compensation, enabling ultrafast transient response without external loop compensation. Its one-shot on-time timer sets minimum on-time at 30ns and minimum off-time at 100ns, supporting stable operation across wide VIN and VOUT ranges.

It integrates dual MOSFETs (19.6mΩ high-side, 5.7mΩ low-side at TJ = 25°C), a 4.8V internal LDO for gate drive, bootstrap circuitry, and open-drain power-good signaling with 91% rising threshold and 2.5ms delay. Thermal shutdown activates at 150°C with 25°C hysteresis.

Key Specifications

Pinout & Package

MPQ8632HGL-10-Z 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; and pin 7 is VCC (4.8V LDO output).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ8632GLE-10-Z, the HGL-10-Z offers superior fault resilience in dynamic loads; versus RTQ2132BGQW-Z, it delivers faster transient response and simpler layout but trades off current rating and maximum switching frequency.

Availability

MPQ8632HGL-10-Z is available at Aetrix Electronics and suitable for telecom infrastructure, server power delivery, flat-panel display biasing, and distributed power systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MPQ8632HGL-10-Z 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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MPQ8632 family targets high-current, high-efficiency DC/DC conversion in space-constrained applications such as networking equipment, computing platforms, and consumer displays-emphasizing integration, thermal robustness, and ease of use.

FAQ

What is the difference between MPQ8632HGL-10-Z and MPQ8632GLE-10-Z?

The MPQ8632HGL-10-Z features non-latch over-voltage protection, allowing automatic recovery after fault clearance, whereas MPQ8632GLE-10-Z uses latch-off OVP requiring manual reset. Both share identical 10A rating, 3×4mm QFN package, pinout, and electrical specifications except OVP behavior.

Can MPQ8632HGL-10-Z operate with a 2.5V input supply?

Yes, but only when an external 5V bias is applied to the VCC pin to disable the internal LDO. With internal bias active, the minimum input is 4.5V. The 2.5V–18V range requires external 5V bias per the datasheet's "Low Input Voltage Range" specification.

What is the recommended layout practice for the SW and PGND pins?

SW and PGND pins require wide copper pours, multiple thermal vias to inner ground planes, and minimal trace length to reduce parasitic inductance. SW traces must avoid sharp corners and adjacent sensitive nodes (e.g., FB, SS) to prevent coupling-induced instability or false OVP triggering.

Does MPQ8632HGL-10-Z support parallel operation for higher current?

No, the MPQ8632HGL-10-Z does not include current-sharing or synchronization features. Parallel operation is not supported or characterized. For >10A, select the MPQ8632GVE-15-Z or MPQ8632GVE-20-Z variants with larger 5×4mm packages and higher current capability.

How is the soft-start time calculated for MPQ8632HGL-10-Z?

Soft-start time is determined by the external capacitor on the SS pin and the internal 20μA charging current: tSS ≈ CSS × 0.611V / 20μA. For example, a 100nF capacitor yields ~3.06ms ramp time. This linear ramp prevents output overshoot and limits inrush into downstream capacitors.

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

Yes, the open-drain PG output can be pulled up to any DC voltage ≤6V, including 3.3V. Its sink capability is 12mA at 600mV drop, ensuring reliable logic-level assertion. The 2.5ms delay from FB ≥91% to PG high allows sufficient settling before system enable.

What thermal derating applies to MPQ8632HGL-10-Z at 85°C ambient?

With θJA = 46°C/W (QFN 3×4mm), maximum allowable power dissipation at TA = 85°C is PD(MAX) = (150°C – 85°C) / 46°C/W ≈ 1.41W. At 12V→1.2V/10A operation, typical losses are ~1.1W, so full 10A output remains viable with adequate PCB copper area and airflow.