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Monolithic Power Systems Inc. MPQ8633BGLE-P
- Part No.:
- MPQ8633BGLE-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 21-PowerVFQFN
- Datasheet:
-
MPQ8633BGLE-P.pdf
- Description:
- IC REG BUCK ADJ 20A 21QFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,152
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Product details
Overview
MPQ8633BGLE-P from Monolithic Power Systems is a fully integrated, high-frequency synchronous buck converter delivering up to 20A output current with adjustable current limit, programmable switching frequency (600/800/1000 kHz), and differential remote-sense voltage tracking. It operates from 4V–16V input, regulates output from 0.6V to 5.5V, and integrates low-RDS(ON) MOSFETs (8.6 mΩ HS / 2.5 mΩ LS) in a QFN-21 (3mm×4mm) package for telecom power supplies and server point-of-load applications.
For engineers reviewing the MPQ8633BGLE-P datasheet, MPQ8633BGLE-P pinout, MPQ8633BGLE-P application, or MPQ8633BGLE-P equivalent, key selection considerations include its adaptive constant-on-time (COT) control for ultrafast transient response, non-latch OCP with programmable threshold via external resistor, PGOOD open-drain output with clamped low-level behavior during input failure, and support for pre-bias start-up and output discharge functionality.
Technical Context
The MPQ8633BGLE-P employs an internally compensated adaptive COT control architecture that maintains stable regulation across wide VIN/VOUT ranges without external compensation components. Its valley-current sensing enables cycle-by-cycle over-current protection with programmable trip point set by a single RCS resistor tied to AGND.
It integrates dual MOSFET drivers with dead-time control to prevent shoot-through, supports both forced CCM and pulse-skip light-load operation via MODE pin configuration, and implements output sinking mode (OSM) to actively regulate overshoot by enabling controlled negative inductor current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 16V (internal bias) or 2.7V to 16V (with external 3.3V VCC bias) - enables direct 12V rail operation and compatibility with wide-input industrial systems. |
| Output Current | 20A continuous - sufficient for high-power FPGA, ASIC, or GPU core rails in servers and networking equipment. |
| Switching Frequency | Selectable 600/800/1000 kHz via MODE resistor - allows optimization of size vs. efficiency and EMI performance. |
| Feedback Reference | 600 mV ±0.5% (0°C to +70°C) - ensures tight output voltage accuracy critical for low-voltage digital loads. |
| Current Limit Accuracy | 1.2 V ±4.2% threshold at CS pin - enables precise, resistor-programmable OCP with 9–11 µA/A scaling ratio. |
| Thermal Shutdown | 160°C with 30°C hysteresis - provides robust thermal margin for sustained 20A operation in compact PCB layouts. |
| PGOOD Threshold | 92.5% to 95.5% VREF high, 77% to 83% VREF low - delivers reliable power sequencing signal with defined window tolerance. |
Pinout & Package
MPQ8633BGLE-P is housed in a thermally enhanced QFN-21 (3mm × 4mm) package with exposed PGND pad for efficient heat dissipation. Pin 1 is marked by a dot; top-side marking includes "MP" prefix, year/week code, part number suffix "8633B", lot code, and "E".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 BST | Bootstrap supply | Connects ceramic capacitor between SW and BST to generate floating gate drive voltage for high-side MOSFET. |
| 2 AGND | Analog ground reference | Provides clean reference for feedback, current sense, and internal control circuits; must be isolated from noisy PGND. |
| 3 CS | Current sense input | Accepts mirrored inductor current signal; sets OCP threshold via external RCS resistor to AGND. |
| 4 MODE | Operation mode select | Configures CCM/pulse-skip and switching frequency (600/800/1000 kHz) using resistor to AGND or VCC. |
| 5 TRK/REF | Tracking/reference input | Sets output voltage via external analog signal (0.3–1.4V); also controls soft-start time when capacitor added to RGND. |
| 6 RGND | Remote sense negative | Completes differential feedback path; short to GND if remote sensing is unused. |
| 7 FB | Feedback input | Monitors output voltage via resistor divider; enables precise regulation and tracking with minimal trace impedance. |
| 8 EN | Enable control | Active-high logic input; supports automatic start-up with pull-up to VIN and pre-bias monotonic start capability. |
| 9 PGOOD | Power good indicator | Open-drain output clamped to ~0.7V during input failure; requires external pull-up for system sequencing. |
| 10,21 VIN | Main input supply | Primary power source for internal MOSFETs and regulators; requires local bulk and high-frequency decoupling. |
| 11–18 PGND | Power ground | High-current return path for SW node and output inductor; must be connected to large copper pour under package. |
| 19 VCC | Internal LDO output | 3.0V ±4% regulated supply for gate drivers and control logic; requires ≥1µF X7R/X5R ceramic decoupling. |
| 20 SW | Switch node | Drives external inductor; swings from near 0V to VIN; requires short, wide traces and minimized loop area. |
Key Features
| Feature | Design Value |
|---|---|
| Differential remote sense | Separate RGND and FB pins enable accurate load regulation despite PCB IR drop, critical for <1V core rails. |
| Programmable current limit | OCP threshold set via single RCS resistor (e.g., 10kΩ → ~22A limit), supporting flexible fault margin design. |
| Output voltage discharge | Integrated discharge FET (RON ≈ 80 Ω) activates on EN deassertion, safely discharging output capacitors. |
| Stable with zero-ESR capacitors | Adaptive internal ramp compensation eliminates need for ESR-based output capacitor stabilization. |
| Pre-bias start-up | Enables monotonic startup into pre-charged outputs without reverse current flow or output collapse. |
Applications
| Telecom Power Supply | Server Point-of-Load |
|---|---|
|
Use Scenario: Regulating 12V intermediate bus to 0.85V/15A for baseband processor in 5G radio unit. IC Role / Device Role / Timing Role: Primary synchronous buck regulator with differential remote sense correcting for board-level voltage drop. Use Value: Maintains ±0.5% output accuracy under dynamic load steps up to 10A/µs while operating at 800kHz for optimal filter size. |
Use Scenario: Providing 1.8V/20A to DDR5 memory subsystem in cloud-computing server motherboard. IC Role / Device Role / Timing Role: High-current PoL converter with programmable soft-start and PGOOD sequencing for memory initialization. Use Value: Enables monotonic startup into pre-biased memory rails and supports voltage tracking during multi-rail power-up sequences. |
| Networking Switch ASIC Core | GPU Voltage Regulator Module |
|
Use Scenario: Delivering 0.75V/18A to 7nm switch ASIC with tight transient requirements in enterprise switch line card. IC Role / Device Role / Timing Role: Adaptive COT-controlled buck converter managing rapid load transients without external compensation. Use Value: Achieves <500ns recovery from 10A step load with <±20mV deviation, eliminating need for large bulk capacitance. |
Use Scenario: Generating 0.9V/20A for discrete graphics processing unit requiring fast dynamic voltage scaling (DVS). IC Role / Device Role / Timing Role: Programmable-frequency buck converter supporting voltage tracking and output discharge during GPU state transitions. Use Value: Tracks master rail during DVS events and discharges output within 1ms upon disable, meeting PCIe power management timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ8633DGLE-Z | Same die, but with different top marking and tape-and-reel packaging (–Z suffix); identical electrical specs and pinout. | No functional difference; used interchangeably where reel packaging is required for SMT production. | Select MPQ8633DGLE-Z only when automated pick-and-place requires tape-and-reel delivery. |
| RTQ2132BGQW | 20A buck with 3.1–18V input, but uses voltage-mode control (not COT); lacks TRK/REF pin and differential remote sense. | Requires external compensation network; less suitable for ultrafast transient loads or precision tracking applications. | Choose only if COT control and voltage tracking are not required, and voltage-mode stability analysis is preferred. |
Compared with MPQ8633BGLE-P, MPQ8633DGLE-Z offers identical performance in reel format, while RTQ2132BGQW trades adaptive COT and tracking capability for voltage-mode simplicity-making MPQ8633BGLE-P superior for high-dV/dt digital loads and multi-rail coordination.
Availability
MPQ8633BGLE-P is available at Aetrix Electronics and suitable for telecom infrastructure, server power delivery, and high-end GPU voltage regulation requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for MPQ8633BGLE-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MPQ8633B product line targets high-current, high-efficiency DC/DC conversion for datacenter, networking, and computing applications, emphasizing integration, thermal robustness, and fast transient response without external compensation.
FAQ
What is the minimum recommended output capacitance for MPQ8633BGLE-P?
The MPQ8633BGLE-P is stable with zero-ESR ceramic capacitors. Minimum recommended output capacitance is 220µF total, using multiple parallel X7R/X5R MLCCs (e.g., ten 22µF/6.3V units) placed close to the IC to minimize loop inductance and ensure stability across load and temperature.
How does the TRK/REF pin function during power-up and tracking modes?
During power-up, TRK/REF sets soft-start time via capacitor to RGND (e.g., 1nF = 1ms). Once operational, applying an external voltage (0.3–1.4V) to TRK/REF makes FB track it directly-bypassing the internal reference and enabling precise multi-rail sequencing or dynamic voltage scaling.
Can MPQ8633BGLE-P operate with only internal VCC bias, or is external 3.3V required?
MPQ8633BGLE-P supports both configurations: internal VCC bias enables operation from 4V–16V VIN, while external 3.3V VCC bias extends input range down to 2.7V. Internal bias is sufficient for most 12V systems; external bias is needed only for sub-4V inputs.
What happens to PGOOD when VIN drops below UVLO threshold?
When VIN falls below 2.15V (UVLO falling threshold), PGOOD is actively clamped to ~0.7V regardless of FB status. This low-level assertion remains until VIN recovers above 2.4V and the device re-enables-ensuring unambiguous power-failure signaling for system reset logic.
Is the MODE pin compatible with standard logic voltage levels?
No-the MODE pin is resistor-configured, not logic-driven. It accepts either grounded, pulled to AGND via precision resistor (e.g., 60.4kΩ for 800kHz CCM), or pulled to VCC. Direct logic-level connection will cause incorrect frequency or mode selection and is not supported.
Does MPQ8633BGLE-P support output current monitoring?
No-it provides cycle-by-cycle over-current protection via CS pin but does not offer proportional current monitor output. The CS pin voltage reflects sensed inductor current (10µA/A), but it is intended solely for OCP threshold comparison, not analog current readback.
What is the maximum allowable thermal resistance from junction to board (θJB) for full 20A operation?
The datasheet specifies θJB = 8°C/W for the QFN-21 package. To sustain 20A continuously at 12V input/1V output without exceeding 125°C junction temperature, PCB layout must achieve ≤8°C/W effective θJB-requiring ≥4-layer board with internal ground/power planes and ≥6 thermal vias under the exposed PGND pad.
MPQ8633BGLE-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 21-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):
- 2.7V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 20A
- Frequency - Switching:
- 600kHz ~ 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 21-QFN (3x4)
MPQ8633BGLE-P FAQ
1.How can I place an order for MPQ8633BGLE-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ8633BGLE-P 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 MPQ8633BGLE-P reliable?
The price and inventory of MPQ8633BGLE-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ8633BGLE-P is usually 5 days.
3.What payment methods are accepted for MPQ8633BGLE-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ8633BGLE-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ8633BGLE-P?
MPQ8633BGLE-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ8633BGLE-P 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 MPQ8633BGLE-P?
For technical support, including MPQ8633BGLE-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ8633BGLE-P requirements.
6.How does Aetrix verify that MPQ8633BGLE-P is sourced from the original manufacturer or authorized distributors?
All MPQ8633BGLE-P 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 MPQ8633BGLE-P meets industry standards.
7.What is the process for return or replacement of MPQ8633BGLE-P?
All MPQ8633BGLE-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ8633BGLE-P, 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 MPQ8633BGLE-P part is unused and in its original packaging.
Return procedure for MPQ8633BGLE-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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