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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Monolithic Power Systems Inc. MPQ8632DGLE-6-Z

Name: MPQ8632DGLE-6-Z
Brand: Monolithic Power Systems Inc.
SKU: MPQ8632DGLE-6-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ8632DGLE-6-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 16-PowerVFQFN

Datasheet:: MPQ8632DGLE-6-Z.pdf

Description:: IC REG BUCK ADJ 6A 16QFN

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Product details

Overview

MPQ8632DGLE-6-Z from Monolithic Power Systems is a high-efficiency, 6A synchronous step-down DC/DC converter in a 3mm×4mm QFN package, operating from 4.5V–18V input and delivering adjustable output from 0.611V to 13V. It uses adaptive Constant-On-Time (COT) control for ultrafast transient response, integrates low-R_DS(ON) MOSFETs (28 mΩ HS / 15.8 mΩ LS), and features programmable soft start/shut-down, pre-bias startup, and open-drain power-good signaling - deployed in telecom base stations and server VRMs.

For engineers reviewing the MPQ8632DGLE-6-Z datasheet, MPQ8632DGLE-6-Z pinout, MPQ8632DGLE-6-Z application, or MPQ8632DGLE-6-Z equivalent, key selection criteria include its 6A continuous output rating, 200kHz–1MHz programmable switching frequency, 0.611V reference accuracy (±0.5% over 0°C–70°C), thermal shutdown at 150°C, and compatibility with ceramic or POSCAP output capacitors under CCM/DCM operation.

Technical Context

The MPQ8632DGLE-6-Z implements adaptive COT control without an external oscillator, using the FREQ pin and input feed-forward to maintain stable switching frequency across input voltage variation. Its internal architecture includes dual current-limit protection (valley limit at 6.5–8.5A, negative limit at –4A to –1A), integrated 4.8V VCC LDO, and bootstrap gate drive for the high-side MOSFET.

It supports both internal bias (4.5V–18V IN range) and external 5V VCC bias (enabling 2.5V–18V operation), employs tri-state LS-FET driver in DCM to minimize light-load losses, and uses a dedicated SS pin with 20μA charge / 10μA discharge current to precisely control ramp-up/ramp-down timing independent of output capacitance.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	6A continuous - supports single-rail CPU core or FPGA I/O supply without external current sharing.
Input Voltage Range	4.5V–18V (internal bias) - compatible with 5V, 12V, and 15V intermediate bus architectures.
Output Voltage Range	0.611V–13V - set via external resistor divider on FB pin; enables DDR, GPU, and ASIC core rails.
Switching Frequency	200kHz–1MHz - programmable via FREQ-to-IN resistor; higher frequencies reduce inductor/capacitor footprint.
R_DS(ON) (HS/LS)	28 mΩ / 15.8 mΩ @ 25°C - minimizes conduction loss at full load; enables >92% peak efficiency at 12V→3.3V/6A.
Reference Voltage Accuracy	±0.5% over 0°C–70°C junction - ensures tight output regulation for sensitive digital loads.
Thermal Shutdown	150°C with 25°C hysteresis - protects against sustained overload or poor PCB thermal design.
Power Good Delay	2.5ms after FB ≥ 90% V_REF - provides deterministic sequencing for downstream logic or PMICs.

Pinout & Package

MPQ8632DGLE-6-Z is housed in a thermally enhanced 16-pin QFN package (3mm × 4mm, 0.5mm pitch) with exposed thermal pad (PGND-connected) for efficient heat dissipation in high-power density layouts.

Pin/Terminal	Circuit Role	Design Meaning
1 EN	Enable control input	Digital logic-level input; pull high to enable regulator; requires external pull-up or voltage divider for automatic startup.
2 FREQ	Frequency programming node	Resistor-to-IN sets ON-time and stabilizes switching frequency via line feed-forward compensation.
3 FB	Feedback sensing input	Monitors output voltage via resistor divider; also triggers non-latch OVP when V_OUT exceeds 120% nominal.
4 SS	Soft start/shut-down timing	Capacitor-connected pin controls ramp time; 20μA charge / 10μA discharge current enables precise timing calibration.
5 AGND	Analog ground reference	Separate ground for control circuitry; must be routed separately from PGND to avoid noise coupling into feedback path.
6 PG	Open-drain power-good signal	Indicates regulated output status; requires external 100kΩ pull-up; asserts high after 2.5ms delay when V_FB ≥ 90% V_REF.
7 VCC	Internal 4.8V LDO output	Supplies gate drivers and bias circuits; disabled when external 5V applied, enabling lower VIN operation down to 2.5V.
8 BST	Bootstrap supply node	Connects to SW via capacitor to generate floating gate drive voltage for high-side MOSFET.
9,14 IN	Main power input	High-current input rail; requires low-ESR bulk and ceramic decoupling close to pins with wide copper pours and multiple vias.
10,11,12,13 PGND	Power ground return	Primary current return path for HS/LS switches and inductor; must be solidly connected to thermal pad for thermal and EMI performance.
15,16 SW	Switch node output	Drives external inductor; experiences fast dV/dt transitions; requires short, low-inductance routing to minimize ringing and EMI.

Key Features

Feature	Design Value
Adaptive COT control	Eliminates external compensation network; achieves <10μs load transient recovery with ±1% output deviation.
Programmable soft start	SS capacitor value directly sets ramp time (e.g., 47nF → ~2.35ms); prevents inrush current into large output capacitors.
Pre-bias startup support	Disables switching until SS voltage exceeds pre-charged FB voltage - avoids reverse current into powered-up downstream rails.
Non-latch OCP/OVP/TSD	Auto-recovery after fault clears; valley current limit (6.5–8.5A) protects against overload; negative limit (–4A to –1A) prevents reverse inductor current damage.
Integrated bootstrap diode	Enables self-powered high-side gate drive without external diode; reduces BOM count and layout complexity.
Low quiescent current	1μA shutdown current and 700–1000μA quiescent current - suitable for always-on system management rails.

Applications

Telecom Base Stations

Servers & Data Centers

Use Scenario: Point-of-load conversion for RF transceiver bias rails and FPGA configuration supplies in macrocell BTS units.

IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering stable 1.2V/6A to FPGA fabric with <50ns transient response to burst-mode traffic loads.

Use Value: Adaptive COT control maintains regulation during rapid 0–6A load steps; integrated OCP prevents latch-up during antenna VSWR faults.

Use Scenario: Core voltage regulation for dual-socket Xeon servers requiring tight tolerance and high efficiency at partial load.

IC Role / Device Role / Timing Role: Secondary-side VRM supplying 0.85V/6A to CPU cores with programmable soft start synchronized to PCH reset sequence.

Use Value: DCM skip mode achieves >85% efficiency at 100mA load; PG signal sequences memory controller initialization after rail stabilization.

Flat Panel Displays

Distributed Power Systems

Use Scenario: Backlight LED driver power rail in 4K UHD monitors with dynamic dimming and HDMI hot-plug detection.

IC Role / Device Role / Timing Role: Intermediate bus converter stepping 12V down to 5V for LED driver ICs, with pre-bias startup avoiding flash during hot-swap events.

Use Value: Pre-bias capability prevents reverse current into powered display panel; SS timing eliminates backlight flicker during power-on.

Use Scenario: Modular power supply unit (PSU) in industrial PLCs where field-replaceable DC/DC modules require plug-and-play compatibility.

IC Role / Device Role / Timing Role: Standalone POL module delivering 3.3V/6A to isolated communication interfaces (RS-485, CAN FD) with thermal derating up to 85°C ambient.

Use Value: 125°C max junction temperature and robust thermal shutdown allow operation in sealed enclosures; QFN package enables compact 1"×1" board area.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MPQ8632-6	Active production version; identical electrical specs but updated process and EOL status removed.	No functional change; supports same PCB layout and BOM - direct replacement for new designs.	Select MPQ8632-6 for new designs requiring long-term availability and full manufacturer support.
MP2315GJ-Z	3A rated, smaller 2mm×2mm QFN, fixed 500kHz frequency, no FREQ pin or programmable soft start.	Limited to lower-current applications; lacks frequency tuning and precise ramp control needed for high-performance SoCs.	Choose only for space-constrained, cost-sensitive 3A applications where adaptive COT and soft-start precision are not required.

Compared with MPQ8632DGLE-6-Z, MPQ8632-6 offers identical performance with assured supply continuity, while MP2315GJ-Z trades current capacity and configurability for size and cost - making MPQ8632-6 the recommended drop-in upgrade path.

Availability

MPQ8632DGLE-6-Z is available at Aetrix Electronics and suitable for telecom infrastructure, server power delivery, and industrial distributed power systems requiring stable component supply and known end-of-life transition paths.

Supply support for MPQ8632DGLE-6-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 series belongs to MPS's high-current synchronous buck converter product line, engineered specifically for high-density, high-efficiency point-of-load regulation in networking, computing, and industrial equipment.

FAQ

What is the recommended minimum output capacitance for stable operation?

MPQ8632DGLE-6-Z requires ≥22μF total output capacitance with ≤5mΩ ESR for stable CCM operation. For ceramic capacitors, use ≥47μF X7R/X5R with 10mΩ ESR or add external ramp compensation per Equation 5 in the datasheet to prevent subharmonic oscillation.

Can the device operate with an external 5V VCC bias?

Yes - applying 5V to the VCC pin disables the internal 4.8V LDO, allowing input voltage operation down to 2.5V. This configuration bypasses the internal regulator and reduces power loss, but requires careful decoupling of the external 5V source near the VCC pin.

How does the soft-start time relate to the SS capacitor value?

Soft-start time (T_SS) is calculated as T_SS = (C_SS × V_REF) / 20μA. For example, a 47nF capacitor yields ~1.45ms ramp time. Soft-shutdown time is double the soft-start time due to 10μA discharge current.

Is pre-bias startup guaranteed across the full temperature range?

Yes - pre-bias startup functionality is characterized from –40°C to +125°C. The IC monitors FB voltage versus SS voltage continuously during enable assertion and suppresses switching until SS exceeds the pre-biased output level, preventing reverse current regardless of junction temperature.

What is the maximum allowable input voltage during transient conditions?

The absolute maximum input voltage is 21V, but only for ≤100ns pulses. Sustained operation above 18V violates recommended operating conditions and may trigger overvoltage protection or cause permanent damage to internal MOSFETs.

Does the PG pin require an external pull-up resistor?

Yes - PG is an open-drain output and must be pulled up to a voltage ≤5.5V (e.g., VCC or 3.3V) via a 100kΩ resistor. A 10nF capacitor from PG to GND is recommended if the pull-up resistor is <100kΩ to filter noise-induced false trips.

How is the switching frequency affected by input voltage variation?

With FREQ pin connected to IN via resistor, the MPQ8632DGLE-6-Z uses feed-forward compensation to maintain nearly constant frequency across input voltage changes - typical variation is <±3% from 4.5V to 18V input at fixed load and temperature.

MPQ8632DGLE-6-Z Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 16-PowerVFQFN

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Output Type:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 4.5V

Voltage - Input (Max):: 18V

Voltage - Output (Min/Fixed):: 0.611V

Voltage - Output (Max):: 13V

Current - Output:: 6A

Frequency - Switching:: 200kHz ~ 1MHz

Synchronous Rectifier:: Yes

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-QFN (3x4)

MPQ8632DGLE-6-Z FAQ

1.How can I place an order for MPQ8632DGLE-6-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ8632DGLE-6-Z on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MPQ8632DGLE-6-Z reliable?

The price and inventory of MPQ8632DGLE-6-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ8632DGLE-6-Z is usually 5 days.

3.What payment methods are accepted for MPQ8632DGLE-6-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ8632DGLE-6-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ8632DGLE-6-Z?

MPQ8632DGLE-6-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ8632DGLE-6-Z order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MPQ8632DGLE-6-Z?

For technical support, including MPQ8632DGLE-6-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ8632DGLE-6-Z requirements.

6.How does Aetrix verify that MPQ8632DGLE-6-Z is sourced from the original manufacturer or authorized distributors?

All MPQ8632DGLE-6-Z products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MPQ8632DGLE-6-Z meets industry standards.

7.What is the process for return or replacement of MPQ8632DGLE-6-Z?

All MPQ8632DGLE-6-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ8632DGLE-6-Z, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MPQ8632DGLE-6-Z part is unused and in its original packaging.

Return procedure for MPQ8632DGLE-6-Z:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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