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Monolithic Power Systems Inc. MPQ8632GVE-20-Z
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- Part No.:
- MPQ8632GVE-20-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 29-VFQFN Exposed Pad
- Datasheet:
-
MPQ8632GVE-20-Z.pdf
- Description:
- IC REG BUCK ADJ 20A 29QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,808
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Product details
Overview
MPQ8632GVE-20-Z from Monolithic Power Systems is a 20A synchronous step-down DC/DC converter with 2.5V–18V input range, 0.611V–13V adjustable output, Constant-On-Time (COT) control, and non-latch over-voltage protection. It delivers high efficiency in telecom base stations and server power rails where compact 5mm×4mm QFN packaging and fast transient response are critical.
For engineers reviewing the MPQ8632GVE-20-Z datasheet, MPQ8632GVE-20-Z pinout, MPQ8632GVE-20-Z application, or MPQ8632GVE-20-Z equivalent, key selection criteria include its 20A continuous output rating, 9.9mΩ high-side RDS(ON), programmable 200kHz–1MHz switching frequency, thermal shutdown at 150°C, and compatibility with pre-bias startup in distributed power systems.
Technical Context
The MPQ8632GVE-20-Z implements adaptive COT control with feed-forward compensation via the FREQ pin, enabling stable operation across wide input voltage variations while maintaining near-constant switching frequency. Its internal 4.8V VCC LDO powers gate drivers, and bootstrap circuitry supports high-side MOSFET drive without external charge pumps.
It operates in PWM mode under continuous conduction (CCM) and transitions to skip-mode DCM at light loads, improving light-load efficiency. Protection includes non-latch OCP with 20A–25A valley current limit, OVP at 130% VFB, UVP at 50% VFB, and thermal shutdown with 25°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 20A continuous - supports high-power CPU/GPU core rails and FPGA auxiliary supplies without external current sharing. |
| Input Voltage Range | 2.5V–18V - enables operation from 3.3V bias rail or direct 12V/15V intermediate bus with internal LDO disabled. |
| Output Voltage Range | 0.611V–13V - covers sub-1V core voltages and 12V system rails using standard resistor divider feedback. |
| Switching Frequency | 200kHz–1MHz - adjustable via FREQ-to-IN resistor; higher frequencies reduce inductor size but increase switching loss. |
| High-Side RDS(ON) | 9.9mΩ @ 25°C - minimizes conduction loss at full load, enabling >92% peak efficiency at 12VIN/1VOUT. |
| Reference Voltage | 611mV ±0.5% over –40°C to +125°C - ensures tight output regulation across industrial temperature range. |
| Thermal Shutdown | 150°C with 25°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
MPQ8632GVE-20-Z uses a 29-pin QFN package (5mm × 4mm, 0.4mm pitch) with exposed thermal pad. Pin layout optimizes high-current path routing: multiple IN, PGND, and SW pins reduce trace resistance and improve thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 24 | IN | Primary power input for internal MOSFETs; requires low-ESR bulk capacitance and wide copper pours. |
| 2 | FREQ | Resistor-programmed frequency set point; connects to IN to enable line feed-forward for stable fSW vs. VIN. |
| 3 | FB | Feedback node for output voltage regulation; sensitive analog input requiring short, via-free routing. |
| 4 | SS | Soft-start timing control; external capacitor sets ramp rate to prevent inrush current on power-up. |
| 5 | AGND | Analog ground reference for control circuitry; must be isolated from high-current PGND until single-point connection. |
| 6 | PG | Open-drain power-good signal; asserts high when VOUT is within ±10% of target, with 2.5ms delay. |
| 7 | VCC | Internal 4.8V LDO output; powers gate drivers; can be bypassed with external 5V bias to extend low-VIN capability. |
| 8 | BST | Bootstrap supply for high-side driver; requires ceramic capacitor between BST and SW to sustain gate drive. |
| 9, 25–29 | SW | Switch node connecting to inductor and BST capacitor; multiple pins reduce current density and EMI. |
| 10–14, 19–23 | PGND | Power ground return for output inductor and low-side MOSFET; ties to thermal pad for optimal heat transfer. |
| 15–18 | SW | Additional switch node connections - all SW pins must be routed in parallel with equal-length traces. |
| EN | Enable | Digital input controlling startup/shutdown; 1.3V threshold with 250mV hysteresis for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive COT Control | Enables <10μs load transient recovery without external compensation components, simplifying loop design. |
| Pre-bias Startup | Allows safe turn-on into pre-charged output capacitors without reverse current flow or output overshoot. |
| Proprietary Switching Loss Reduction | Optimizes dead-time and gate drive slew rates to minimize shoot-through and switching losses simultaneously. |
| Non-latch OVP/OCP/Thermal Protection | Auto-recovery after fault clearance eliminates need for manual reset or system-level watchdog intervention. |
| Programmable Soft Start | External capacitor sets monotonic VOUT ramp time, preventing undershoot during startup into heavy loads. |
Applications
| Telecom Base Station RF Power Supply | AI Accelerator Board Core Rail |
|---|---|
|
Use Scenario: Powers 5G massive MIMO transceiver ICs requiring stable 0.85V @ 18A with <±1% regulation under dynamic RF transmit bursts. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering regulated core voltage; COT control maintains tight VOUT during 10A/μs load steps. Use Value: 20A rating and 9.9mΩ RDS(ON) eliminate need for paralleling converters, reducing BOM count and PCB area by 35% vs. dual 10A solutions. |
Use Scenario: Supplies GPU and tensor cores on PCIe-based AI inference cards with rapid load transients up to 15A/μs. IC Role / Device Role / Timing Role: High-current buck converter operating in CCM; adaptive COT ensures <50mV droop during 12A step load. Use Value: Programmable soft start prevents inrush into large bulk capacitance, avoiding PCIe link training failures during hot-plug events. |
| Industrial Server Management Controller (BMC) | High-Density Storage Array Power Shelf |
|
Use Scenario: Generates 3.3V @ 5A for BMC SoC and PHY interfaces in 1U rack servers with strict thermal envelope limits. IC Role / Device Role / Timing Role: Secondary POL regulator; thermal shutdown with 25°C hysteresis prevents latch-up during airflow blockage. Use Value: 5mm×4mm QFN footprint allows placement directly beneath BMC SoC, minimizing trace inductance and improving PSRR above 1MHz. |
Use Scenario: Provides 12V @ 20A to backplane interconnects in NVMe storage enclosures with shared cooling across 24 drives. IC Role / Device Role / Timing Role: Intermediate bus converter feeding downstream point-of-load stages; non-latch OCP avoids cascading shutdown during single-drive short. Use Value: 2.5V–18V input range accepts both 3.3V standby and 12V main rails, enabling unified power architecture across sleep/wake states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RTQ2132BGQW | 18A rated, 2.7V–18V input, fixed 600kHz fSW, no FREQ pin adjustment | Lacks programmable frequency and soft-start; requires external OVP circuitry | Choose when fixed-frequency EMI profile is prioritized over design flexibility. |
| TPS546D24RSAR | 25A rated, 3.0V–18V input, PMBus interface, digital loop compensation | Supports telemetry and dynamic voltage scaling but adds firmware complexity | Choose when system-level power sequencing, margining, or real-time monitoring is required. |
Compared with RTQ2132BGQW and TPS546D24RSAR, MPQ8632GVE-20-Z offers superior analog simplicity-no I²C/PMBus overhead, no external compensation, and direct resistor-based frequency tuning-making it ideal for cost-sensitive, high-volume industrial power designs where deterministic analog behavior is preferred.
Availability
MPQ8632GVE-20-Z is available at Aetrix Electronics and suitable for telecom infrastructure, AI accelerator boards, industrial servers, and high-density storage arrays requiring stable component supply and long-term production continuity.
Supply support for MPQ8632GVE-20-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 over two decades of expertise in DC/DC conversion and motor control.
The MPQ8632 family targets high-current, space-constrained POL applications in networking, computing, and industrial systems, emphasizing integration, thermal robustness, and ease of use without sacrificing efficiency.
FAQ
What is the minimum recommended input voltage for MPQ8632GVE-20-Z with internal bias enabled?
The minimum input voltage is 4.5V when using the internal 4.8V VCC LDO. If an external 5V bias is supplied to the VCC pin, the input voltage can be reduced to 2.5V, enabling compatibility with low-voltage intermediate buses such as 3.3V or hybrid power architectures.
How does the MPQ8632GVE-20-Z handle short-circuit conditions?
Under short-circuit, the device enters hiccup mode: it limits peak current to ~30A (valley limit), shuts down for ~30ms, then attempts restart. This cycle repeats until the fault clears, preventing thermal runaway while allowing automatic recovery without host intervention.
Can MPQ8632GVE-20-Z operate with ceramic output capacitors only?
Yes. The COT control architecture is inherently stable with low-ESR ceramic capacitors. The datasheet specifies typical designs using 22μF–100μF X7R/X5R ceramics per phase, eliminating the need for electrolytic or polymer bulk capacitors.
What is the purpose of the AGND and PGND separation in the MPQ8632GVE-20-Z layout?
AGND serves as the quiet reference for feedback, soft-start, and enable circuits; PGND carries high di/dt return currents from the power stage. Separating them prevents noise coupling into control loops, ensuring stable regulation and accurate power-good assertion.
Is the MPQ8632GVE-20-Z RoHS-compliant and lead-free?
Yes. All MPQ8632 devices are lead-free and fully compliant with the EU RoHS directive. The QFN package uses matte tin finish, and MPS provides full material declarations and green status documentation on its official website.
How is the switching frequency affected by input voltage variation?
Frequency remains nearly constant due to feed-forward compensation: the FREQ pin connects to IN through a resistor, causing the one-shot on-time timer to scale inversely with VIN. This maintains stable fSW across the full 2.5V–18V input range.
Does MPQ8632GVE-20-Z support forced PWM mode to avoid audible noise at light loads?
No. It operates exclusively in auto-skip mode-transitioning between CCM and DCM based on load. Forced PWM is not supported; however, the skip-mode frequency remains above 25kHz under typical conditions, avoiding audible coil whine.
MPQ8632GVE-20-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 29-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 20A
- Frequency - Switching:
- 200kHz ~ 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 29-QFN (5x4)
MPQ8632GVE-20-Z FAQ
1.How can I place an order for MPQ8632GVE-20-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ8632GVE-20-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 MPQ8632GVE-20-Z reliable?
The price and inventory of MPQ8632GVE-20-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ8632GVE-20-Z is usually 5 days.
3.What payment methods are accepted for MPQ8632GVE-20-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ8632GVE-20-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ8632GVE-20-Z?
MPQ8632GVE-20-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ8632GVE-20-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 MPQ8632GVE-20-Z?
For technical support, including MPQ8632GVE-20-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ8632GVE-20-Z requirements.
6.How does Aetrix verify that MPQ8632GVE-20-Z is sourced from the original manufacturer or authorized distributors?
All MPQ8632GVE-20-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 MPQ8632GVE-20-Z meets industry standards.
7.What is the process for return or replacement of MPQ8632GVE-20-Z?
All MPQ8632GVE-20-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ8632GVE-20-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 MPQ8632GVE-20-Z part is unused and in its original packaging.
Return procedure for MPQ8632GVE-20-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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