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Monolithic Power Systems Inc. MPQ8632GLE-4-Z
- Part No.:
- MPQ8632GLE-4-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 16-PowerVFQFN
- Datasheet:
-
MPQ8632GLE-4-Z.pdf
- Description:
- IC REG BUCK ADJ 4A 16QFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MPQ8632GLE-4-Z from Monolithic Power Systems is a 4A synchronous step-down DC/DC converter with 2.5V–18V input range, non-latch over-voltage protection, and Constant-On-Time (COT) control for ultrafast transient response. It integrates high- and low-side MOSFETs (28 mΩ / 16.4 mΩ), supports programmable 200kHz–1MHz switching frequency via external resistor, and delivers 0.611V–13V adjustable output voltage in telecom power rails and server point-of-load applications.
For engineers reviewing the MPQ8632GLE-4-Z datasheet, MPQ8632GLE-4-Z pinout, MPQ8632GLE-4-Z application, or MPQ8632GLE-4-Z equivalent, key selection considerations include its QFN-3×4mm footprint compatibility across 4A–12A variants, internal 4.8V VCC LDO biasing capability, soft-start timing control via external capacitor, and open-drain power-good signaling with 2.5ms delay and 90%–120% FB threshold window.
Technical Context
The MPQ8632GLE-4-Z implements adaptive COT control without an external compensation network, using input voltage feed-forward through the FREQ pin to maintain stable switching frequency across input variations. Its internal gate drivers support bootstrap-based high-side drive and integrated shoot-through prevention with programmable dead time.
It operates in continuous-conduction mode (CCM) up to full 4A load and transitions to discontinuous-conduction mode (DCM) at light loads, enabling skip-mode operation for improved light-load efficiency. Protection includes non-latch OCP (valley current limit of 4–6A), thermal shutdown at 150°C with 25°C hysteresis, and OVP with 130% nominal FB threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 4A continuous - supports compact 12V-to-1V/1.2V PoL conversion in space-constrained server modules. |
| Input Voltage Range | 2.5V–18V - enables direct operation from 3.3V, 5V, or 12V rails when externally biased, or 4.5V–18V with internal VCC LDO. |
| Switching Frequency | 200kHz–1MHz - set by resistor on FREQ pin; higher frequencies reduce inductor size but increase switching loss. |
| RDS(ON) (HS/Low-Side) | 28 mΩ / 16.4 mΩ - minimizes conduction loss at 4A, enabling >92% peak efficiency at 12VIN/1.2VOUT. |
| Reference Voltage | 611 mV ±3 mV (–40°C to +125°C) - ensures tight output regulation accuracy across industrial temperature range. |
| OVP Mode | Non-latch - recovers automatically after fault removal, suitable for systems requiring self-recovery without host intervention. |
| Power Good Threshold | 90%–120% of VFB - provides robust output monitoring with 2.5ms delay, compatible with FPGA/CPU reset sequencing. |
Pinout & Package
MPQ8632GLE-4-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 IN; pins 10–13 are PGND; pins 15–16 are SW; pin 7 is VCC; pin 8 is BST; pin 5 is AGND; pin 6 is PG; pin 4 is SS; pin 3 is FB; pin 2 is FREQ.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Digital logic-level input; pull-up to IN enables automatic startup; must not be left floating. |
| FREQ (Pin 2) | Frequency programming node | Resistor-connected to IN sets ON-time and stabilizes frequency against VIN variation via feed-forward. |
| FB (Pin 3) | Output voltage feedback sense | Monitors resistive divider output; sets VOUT = 0.611V × (1 + R1/R2); also triggers OVP at 130% VFB. |
| SS (Pin 4) | Soft-start timing control | External capacitor value determines output ramp rate; prevents inrush current during power-up. |
| AGND (Pin 5) | Analog ground reference | Separate ground for control circuitry; must be star-connected to PGND near IC to minimize noise coupling. |
| PG (Pin 6) | Open-drain power-good indicator | Sinks ≥12mA when VFB ≥ 90%; requires external 100kΩ pull-up; delays 2.5ms after valid regulation. |
| VCC (Pin 7) | Internal 4.8V LDO output | Powers gate drivers and control logic; bypassed with ≥1µF X7R ceramic; disabled if 5V external bias applied. |
| BST (Pin 8) | Bootstrap supply for high-side driver | Requires 0.1µF ceramic capacitor between BST and SW to sustain gate drive above VIN during HS-FET conduction. |
| IN (Pins 9, 14) | Main power input | Supplies internal MOSFETs and bias circuits; requires low-ESR bulk and high-frequency ceramic decoupling. |
| PGND (Pins 10–13) | Power ground return path | High-current return for SW node and internal FETs; must use wide copper pours and multiple vias to thermal pad. |
| SW (Pins 15, 16) | Switch node connection | Drives external inductor; experiences fast dV/dt edges; layout critical to minimize EMI and ringing. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive COT control | Eliminates external loop compensation while delivering <10µs load transient response at 4A step change. |
| Integrated MOSFETs | 28 mΩ HS + 16.4 mΩ LS enable single-chip 4A solution with minimal BOM count and PCB area. |
| Programmable soft start | Capacitor-controlled ramp prevents output overshoot and limits input inrush into bulk capacitance. |
| Pre-bias start-up | Allows safe turn-on into pre-charged output rail without reverse current or instability. |
| Non-latch OVP/OCP | Enables autonomous recovery after overvoltage or overcurrent events without system-level reset assertion. |
Applications
| Telecom Point-of-Load | Server Baseboard Management |
|---|---|
Use Scenario: Powering 1.2V FPGA I/O banks or 1.8V memory interfaces in 48V-powered telecom line cards. IC Role / Device Role / Timing Role: Primary buck regulator delivering tightly regulated, low-noise 4A output with fast transient response to dynamic logic switching. Use Value: Maintains <±1% output regulation under 4A/10µs load steps, reducing need for large output capacitance and lowering system cost. |
Use Scenario: Supplying 3.3V standby power to BMC (Baseboard Management Controller) and CPLD in enterprise servers. IC Role / Device Role / Timing Role: Always-on PoL converter with pre-bias start-up and PG signaling for safe firmware initialization sequencing. Use Value: Enables reliable cold-boot into pre-charged rails and provides deterministic power-good assertion for BMC reset coordination. |
| Industrial PLC I/O Modules | Network Switch ASIC Core Rails |
Use Scenario: Generating isolated 5V or 3.3V supplies for analog sensor front-ends and digital I/O in harsh industrial environments. IC Role / Device Role / Timing Role: Robust DC/DC stage with thermal shutdown and non-latch protection, operating across –40°C to +125°C junction range. Use Value: Sustains operation under sustained overload or ambient temperature spikes without latch-up, improving field reliability. |
Use Scenario: Delivering 0.85V/6A core voltage to multi-gigabit Ethernet switch ASICs with strict ripple and transient requirements. IC Role / Device Role / Timing Role: High-efficiency, low-noise buck converter supporting CCM/DCM auto-transition to optimize efficiency across idle-to-full load. Use Value: Achieves >89% efficiency at 100mA load and >93% at 4A, reducing thermal load on densely packed switch PCBs. |
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 |
|---|---|---|---|
| MPQ8632GLE-6-Z | 6A rated; lower RDS(ON) (19.6 mΩ HS / 15.8 mΩ LS); identical 3×4mm QFN footprint and pinout. | Supports higher current loads without redesign; same PCB layout usable with minor inductor/capacitor derating. | Select when future-proofing for 5–6A peak loads or when margin is required for thermal derating at elevated ambient. |
| RTQ2132BGQW-Z | 4A, 2.7–18V input; fixed 500kHz frequency; no FREQ pin; 12-pin WQFN (2×2mm); different pin assignment and smaller package. | Higher integration density but incompatible footprint; lacks programmable soft-start and pre-bias start-up. | Choose only for space-constrained designs where board re-spin is acceptable and simplified frequency setting is preferred. |
Compared with MPQ8632GLE-6-Z, the -4-Z offers tighter thermal margin at 4A and lower gate charge drive demand; versus RTQ2132BGQW-Z, it provides superior design flexibility via frequency tuning, soft-start control, and proven layout compatibility across the MPQ8632 family.
Availability
MPQ8632GLE-4-Z is available at Aetrix Electronics and suitable for telecom power distribution, server point-of-load regulation, and industrial PLC I/O modules requiring stable component supply with long-term production continuity.
Supply support for MPQ8632GLE-4-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 leadership in DC/DC conversion technology.
The MPQ8632 family targets high-density, high-efficiency intermediate bus converters and point-of-load regulators for networking, computing, and industrial infrastructure, emphasizing footprint scalability and robust protection.
FAQ
What is the minimum input voltage supported by MPQ8632GLE-4-Z?
The MPQ8632GLE-4-Z supports 2.5V minimum input when externally biased with 5V on the VCC pin, enabling operation from 3.3V rails. With internal VCC LDO active, the minimum input rises to 4.5V due to internal bias generation requirements.
Can MPQ8632GLE-4-Z operate with pre-biased output capacitors?
Yes - the device supports pre-bias start-up. During turn-on, the low-side MOSFET remains off until the output voltage falls below the target, preventing reverse current flow and ensuring controlled ramp-up even when VOUT is initially charged.
How is switching frequency set and stabilized across input voltage changes?
Frequency is set by a resistor between FREQ and IN pins. The IC uses input voltage feed-forward to the one-shot timer, maintaining nearly constant frequency from 200kHz to 1MHz as VIN varies - a key advantage of its adaptive COT architecture.
What thermal performance can be expected in a standard 4-layer PCB layout?
With JEDEC-standard 4-layer board (2 oz copper, 1"² thermal pad), θJA is 46°C/W. At 4A/12VIN/1.2VOUT, typical power dissipation is ~0.6W, resulting in ~28°C rise above ambient - well within the 125°C max junction rating.
Does MPQ8632GLE-4-Z require external compensation components?
No - the adaptive Constant-On-Time control architecture eliminates the need for external Type-II or Type-III compensation networks. Loop stability is inherent, simplifying design and reducing bill-of-materials count.
What protection features are implemented, and are they latch-off or auto-recover?
It includes non-latch over-current protection (valley current limit), non-latch over-voltage protection (130% VFB threshold), and thermal shutdown with 25°C hysteresis. All protections auto-recover once fault conditions clear, enabling unattended system resilience.
Is the MPQ8632GLE-4-Z footprint compatible with other variants in the family?
Yes - MPQ8632GLE-4-Z shares identical 16-pin QFN (3mm × 4mm) footprint and pinout with MPQ8632GLE-6-Z, -8-Z, -10-Z, -12-Z, and MPQ8632HGLE-10-Z, allowing scalable current design without PCB revision.
MPQ8632GLE-4-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 16-PowerVFQFN
- 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:
- 4A
- 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)
MPQ8632GLE-4-Z FAQ
1.How can I place an order for MPQ8632GLE-4-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ8632GLE-4-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 MPQ8632GLE-4-Z reliable?
The price and inventory of MPQ8632GLE-4-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ8632GLE-4-Z is usually 5 days.
3.What payment methods are accepted for MPQ8632GLE-4-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ8632GLE-4-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ8632GLE-4-Z?
MPQ8632GLE-4-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ8632GLE-4-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 MPQ8632GLE-4-Z?
For technical support, including MPQ8632GLE-4-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ8632GLE-4-Z requirements.
6.How does Aetrix verify that MPQ8632GLE-4-Z is sourced from the original manufacturer or authorized distributors?
All MPQ8632GLE-4-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 MPQ8632GLE-4-Z meets industry standards.
7.What is the process for return or replacement of MPQ8632GLE-4-Z?
All MPQ8632GLE-4-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ8632GLE-4-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 MPQ8632GLE-4-Z part is unused and in its original packaging.
Return procedure for MPQ8632GLE-4-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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