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Monolithic Power Systems Inc. MPQ8623GD-P
- Part No.:
- MPQ8623GD-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 14-VFQFN
- Datasheet:
-
MPQ8623GD-P.pdf
- Description:
- IC REG BUCK ADJ 6A 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:360
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Product details
Overview
MPQ8623GD-P from Monolithic Power Systems is a fully integrated, high-frequency synchronous step-down converter delivering up to 6A output current with adjustable current limit, 2.85–16V input range (with external 3.3V bias), and selectable 600/1100/2000kHz switching frequency. It employs adaptive constant-on-time (COT) control for ultrafast transient response and operates in QFN-14 (2mm×3mm) package for telecom PoL and server VR applications.
For engineers reviewing the MPQ8623GD-P datasheet, MPQ8623GD-P pinout, MPQ8623GD-P application, or MPQ8623GD-P equivalent, key selection criteria include programmable current limit via CS pin, PGOOD open-drain status signaling, TRK/REF tracking capability, pre-bias start-up support, and latch-off protection for OCP/OVP/UVP/OTP.
Technical Context
The MPQ8623GD-P uses an internally compensated adaptive COT architecture that maintains stable regulation across 0.9V–6V output range while enabling zero-ESR capacitor compatibility. Its valley-current sensing with cycle-by-cycle OCP operates via CS pin with 40µA/A mirroring ratio and supports ±8A peak inductor current handling.
Switching behavior is determined by MODE pin configuration: forced CCM or pulse-skip mode at 600/1100/2000kHz, with internal RAMP compensation ensuring stability over full VIN/VOUT operating range. The device integrates 22.6mΩ HS and 8.1mΩ LS MOSFETs, 3V VCC LDO, and analog TRK/REF input for voltage tracking or soft-start extension.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.85V–16V (with external 3.3V VCC bias); enables direct 3.3V/5V/12V rail operation without auxiliary supply |
| Output Current | 6A continuous; supports high-density point-of-load conversion in servers and networking equipment |
| Switching Frequency | Selectable 600/1100/2000kHz via MODE pin; allows EMI optimization and inductor size reduction |
| Feedback Reference | 0.9V ±0.5% (0°C–70°C); ensures tight output regulation for CPU/GPU core rails |
| Current Limit Accuracy | Programmable 4–8A via RCS resistor; provides precise overcurrent threshold setting with 1.2V OCP threshold |
| Thermal Shutdown | Latch-off at 160°C junction temperature; protects against sustained overload or poor PCB thermal design |
| PGOOD Threshold | 92.5%–95.5% VREF rising; delivers reliable power-sequencing signal for FPGA/CPU reset coordination |
| Soft-Start Time | 1.5ms minimum, extendable via TRK/REF capacitor; prevents inrush current in multi-rail systems |
Pinout & Package
MPQ8623GD-P is housed in a thermally enhanced QFN-14 (2mm × 3mm, 0.5mm pitch) package with exposed PGND pad for optimal heat dissipation in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,14 PGND | Power ground reference | Primary return path for output current; requires wide copper pour and multiple vias to minimize noise coupling |
| 2,11 SW | Switch node | Connects to inductor and BST capacitor; carries high di/dt; must be short and low-inductance |
| 3 VIN | Main input supply | Accepts 2.85–16V; requires local ceramic decoupling near pin to suppress high-frequency ripple |
| 4 CS | Current sense input | Sets OCP threshold via external resistor; enables accurate 4–8A current limiting with 40µA/A scaling |
| 5 EN | Enable control | Active-high logic input; supports automatic startup with pull-up or sequenced enable in multi-rail systems |
| 6 FB | Feedback input | Monitors output via resistor divider; senses remote voltage for improved load regulation |
| 7 AGND | Analog ground | Reference for error amplifier and internal circuits; must be isolated from noisy PGND paths |
| 8 TRK/REF | Tracking/reference input | Accepts 0.3–1.4V external voltage; enables output tracking or extended soft-start timing |
| 9 PGOOD | Power-good indicator | Open-drain output clamped to ~0.7V during input failure; signals valid output to downstream logic |
| 10 BST | Bootstrap supply | Forms floating gate drive for HS-FET; requires 0.1µF X7R ceramic between BST and SW |
| 12 MODE | Operation mode select | Determines CCM/pulse-skip and switching frequency via resistor to AGND or VCC |
| 13 VCC | Internal 3V LDO output | Powers control circuitry; requires ≥1µF X7R ceramic decoupling close to pin |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive COT control | Delivers <1µs load transient response without external compensation components |
| Programmable current limit | Enables precise 4–8A OCP setting via single RCS resistor, eliminating need for external sense resistors |
| Pre-bias start-up | Supports monotonic ramp into pre-charged outputs-critical for hot-swap and multi-phase sequencing |
| Output discharge FET | 80Ω internal switch discharges output when disabled, preventing backfeed in cascaded supplies |
| Stable with zero-ESR capacitors | Eliminates need for electrolytic or tantalum output caps-reduces board area and improves reliability |
| Integrated 3V VCC LDO | Self-powered control circuitry reduces BOM count and simplifies biasing in single-input systems |
Applications
| Telecom Point-of-Load | Server Core Voltage Regulation |
|---|---|
Use Scenario: Regulating 1.8V/3.3V rails for baseband processors and FPGAs in 5G small cells. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing dynamic load steps up to 4A/µs. Use Value: Adaptive COT ensures sub-100mV droop under 5A step load, meeting GR-474-CORE transient specs. | Use Scenario: Providing 0.9V–1.2V core voltage to dual-socket Xeon Scalable CPUs with AVS support. IC Role / Device Role / Timing Role: High-current PoL converter with TRK/REF tracking for coordinated voltage ramping across multiple rails. Use Value: Programmable soft-start and pre-bias start-up prevent brownout during cold boot and warm reset sequences. |
| Cloud Storage Power Management | High-End GPU Power Delivery |
Use Scenario: Generating 1.1V/1.8V supplies for NVMe SSD controllers and DRAM buffers in hyperscale storage arrays. IC Role / Device Role / Timing Role: Compact, high-efficiency buck regulator operating at 1100kHz to minimize filter size in dense 1U chassis. Use Value: 6A capability with 8.1mΩ LS-FET achieves >92% efficiency at 5A/1.1V, reducing thermal load on adjacent ASICs. | Use Scenario: Delivering 0.8–1.35V adaptive core voltage to discrete GPUs in gaming workstations and AI inference cards. IC Role / Device Role / Timing Role: Fast-transient buck converter with PGOOD sequencing and OSM for overshoot suppression during boost events. Use Value: Output sinking mode limits VOUT overshoot to <3% during 0→6A load steps, protecting sensitive GPU I/O interfaces. |
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 |
|---|---|---|---|
| MPQ8623GD-Z | Identical electrical specs; differs only in tape-and-reel packaging (no functional difference) | No impact on circuit design or layout; used exclusively for automated SMT assembly | Select MPQ8623GD-Z for volume production; MPQ8623GD-P is sample/reel variant |
| RTQ2132BGQW | 4A rated, 2.5–18V input, fixed 600kHz; lacks TRK/REF, PGOOD clamping, and negative current limit | Suitable for simpler PoL where tracking, precise OCP, or fault-safe PGOOD are not required | Choose RTQ2132BGQW only if 4A output suffices and advanced protection features are unnecessary |
Compared with MPQ8623GD-P, MPQ8623GD-Z offers identical performance in tape-and-reel format for manufacturing, while RTQ2132BGQW trades current capability and feature depth for lower cost and smaller footprint in less demanding applications.
Availability
MPQ8623GD-P is available at Aetrix Electronics and suitable for telecom infrastructure, cloud server power delivery, and high-end GPU voltage regulation requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MPQ8623GD-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.
The MPQ8623 product line targets high-density, high-efficiency DC/DC conversion in datacenter, networking, and computing applications where fast transient response and minimal external components are critical.
FAQ
What is the minimum recommended output capacitance for stable operation?
The MPQ8623GD-P is designed to be stable with zero-ESR ceramic capacitors. A minimum of 22µF X7R/X5R MLCC is recommended at the output, placed as close as possible to the FB and PGND pins. Total effective capacitance should exceed 47µF for 6A loads to maintain <1% output ripple under full load and transient conditions.
How does the TRK/REF pin affect soft-start and tracking modes?
When TRK/REF is left unconnected or tied to AGND, the internal 1.5ms soft-start timer activates. When an external voltage (0.3–1.4V) is applied, the output tracks that voltage directly-bypassing soft-start-and enables coordinated ramping with other regulators. A capacitor on TRK/REF extends soft-start time per Equation (3) in the datasheet.
Can MPQ8623GD-P operate without an external bootstrap capacitor?
No. A minimum 0.1µF X7R ceramic capacitor must be placed between BST and SW pins to provide gate drive voltage for the high-side MOSFET. Omitting this capacitor causes immediate failure of HS-FET turn-on and results in no output regulation or potential damage due to shoot-through.
What happens during input UVLO and how is PGOOD affected?
When VIN drops below 2.25V (rising threshold), the device shuts down and latches off. During this condition, PGOOD is actively clamped to ~0.7V regardless of external pull-up voltage-providing unambiguous fault indication even if upstream supply fails completely.
Is the current limit threshold affected by temperature or input voltage?
The current limit threshold (set via RCS) has ±10% variation over -40°C to +125°C junction temperature and is independent of VIN. The internal OCP comparator reference remains stable at 1.2V ±2%, and the 40µA/A current mirror ratio is trimmed to ±5% across temperature, ensuring consistent trip points in real-world operating conditions.
Does MPQ8623GD-P support parallel operation for higher current?
No. The MPQ8623GD-P does not include current-sharing or synchronization inputs. Parallel operation is not supported and may cause instability or unequal current distribution. For >6A requirements, use a single higher-current part such as MPQ8632 or implement multiphase controllers.
What is the maximum allowable voltage on the MODE pin?
The MODE pin accepts voltages up to 3.6V. When pulled to VCC (3.0V nominal), it selects pulse-skip mode at 1100kHz. Exceeding 3.6V risks damaging the internal ESD structure; a series resistor is recommended if interfacing with 5V logic.
MPQ8623GD-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 14-VFQFN
- 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):
- 4V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.9V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 6A
- Frequency - Switching:
- 660kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-QFN (2x3)
MPQ8623GD-P FAQ
1.How can I place an order for MPQ8623GD-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ8623GD-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 MPQ8623GD-P reliable?
The price and inventory of MPQ8623GD-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ8623GD-P is usually 5 days.
3.What payment methods are accepted for MPQ8623GD-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ8623GD-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ8623GD-P?
MPQ8623GD-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ8623GD-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 MPQ8623GD-P?
For technical support, including MPQ8623GD-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ8623GD-P requirements.
6.How does Aetrix verify that MPQ8623GD-P is sourced from the original manufacturer or authorized distributors?
All MPQ8623GD-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 MPQ8623GD-P meets industry standards.
7.What is the process for return or replacement of MPQ8623GD-P?
All MPQ8623GD-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ8623GD-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 MPQ8623GD-P part is unused and in its original packaging.
Return procedure for MPQ8623GD-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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