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Monolithic Power Systems Inc. MPM3683GQN-7
- Part No.:
- MPM3683GQN-7
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Converters
- Package:
- 28-PowerBQFN Module
- Datasheet:
-
MPM3683GQN-7.pdf
- Description:
- DC DC CONVERTER 0.6-5.5V
- Quantity:
- Payment:
- Shipping:
Inventory:2,940
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Product details
Overview
MPM3683GQN-7 from Monolithic Power Systems is a fully integrated 8A step-down power module with integrated inductor, MOSFETs, and passive components in a QFN-28 (7×7×4 mm) package. It operates from 2.7V–16V input, delivers adjustable 0.6V–5.5V output, uses adaptive constant-on-time (COT) control for ultrafast transient response, and supports selectable 600/800/1000 kHz switching frequency - deployed in FPGA/ASIC power rails and telecom base station intermediate bus converters.
For engineers reviewing the MPM3683GQN-7 datasheet, MPM3683GQN-7 pinout, MPM3683GQN-7 application, or MPM3683GQN-7 equivalent, key selection criteria include its integrated inductor architecture, differential remote sense capability, non-latched OCP/OVP/OTP protection, pre-bias start-up support, and programmable soft-start via TRK/REF capacitor - all critical for high-density industrial and networking power designs.
Technical Context
The MPM3683GQN-7 implements adaptive COT control with internal ramp compensation to ensure stability across full input (4V–16V) and output (0.6V–5.5V) ranges using zero-ESR MLCCs. Its dual-mode operation - forced CCM or pulse-skip - is selected via MODE pin resistor configuration, enabling efficiency optimization across 0–10A load range.
It integrates a 0.68 µH power inductor, low-RDS(ON) MOSFETs, 3.3V VCC LDO, and analog-tracked feedback via Vo Sense+/– pins. The TRK/REF pin enables voltage tracking or external reference injection, while PG provides open-drain power-good signaling with 1 ms delay and 92.5% VREF threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V–16V (internal bias) or 2.7V–16V (external 3.3V bias): Enables direct use from 5V/12V intermediate buses without auxiliary bias supply. |
| Output Current | 8A continuous / 10A peak: Sustains full-rated load under 75°C ambient with proper PCB copper area and airflow. |
| Output Voltage Range | 0.6V–5.5V, adjustable via RFB1/RFB2: Supports core logic (0.85V), I/O (1.2V/1.8V/3.3V), and analog subsystems (5V). |
| Switching Frequency | 600/800/1000 kHz (MODE-selectable): Higher frequencies reduce external filter size; lower frequencies improve light-load efficiency in pulse-skip mode. |
| Feedback Accuracy | ±0.5% at 0°C–70°C junction: Ensures tight regulation for sensitive FPGA/ASIC VCCINT rails without external trimming. |
| Thermal Shutdown | 160°C with 30°C hysteresis: Prevents thermal runaway during sustained overload or poor heatsinking; automatic recovery after cooldown. |
| Soft-Start Time | 1.6ms (internal) + programmable via TRK/REF capacitor: Controls inrush current into large output capacitance banks (e.g., 10×22 µF). |
Pinout & Package
MPM3683GQN-7 is housed in a thermally enhanced QFN-28 package (7 mm × 7 mm × 4 mm) with exposed thermal pad (PGND-connected) and 28 terminals. Pin numbering follows standard top-view layout with functional grouping: multiple VIN/VOUT/SW/PGND pads for low-impedance power routing, dedicated AGND for analog reference, and isolated sensing pins (Vo Sense+, Vo Sense−) for remote voltage regulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2,6,7 | VOUT | Main output power node - connect directly to output capacitors and load; multiple pins reduce IR drop and improve current sharing. |
| 3 | EN | Digital enable input with 1.22V threshold and 200 mV hysteresis - pull high to VIN or use resistive divider for sequenced startup. |
| 4 | PG | Open-drain power-good signal - requires external pull-up; asserts high when Vo Sense+ ≥ 92.5% VREF, with 1 ms delay. |
| 5,8,9,27 | VIN | Main input power node - tie together with wide copper pour; decouple locally with ≥10 µF ceramic per pin. |
| 10,11,12 | PGND | Power ground return for output stage - must be solidly connected to thermal pad and output capacitors' ground planes. |
| 13 | VCC | Internal 3.3V LDO output - powers control circuitry; no external capacitor required due to integrated 1 µF capacitance. |
| 14–16,19,20,28 | SW | Switch node - connect to integrated inductor; requires large copper pour for thermal dissipation and EMI reduction. |
| 22 | CS | Current limit set point - connect resistor to AGND to program overcurrent threshold (1.2 V typical at CS pin). |
| 23 | MODE | Mode/frequency selection - resistor value determines CCM/pulse-skip behavior and 600/800/1000 kHz switching frequency. |
| 24 | TRK/REF | Tracking/reference input - accepts 0.3–1.4 V external signal; sets soft-start time via external capacitor and enables output voltage tracking. |
| 25 | Vo Sense− | Negative remote sense input - connect directly to load ground; short to AGND if remote sense not used. |
| 26 | Vo Sense+ | Positive remote sense input - connect to load VOUT via dedicated trace; enables precise regulation at point-of-load. |
Key Features
| Feature | Design Value |
|---|---|
| Differential remote sensing | Vo Sense+/– inputs eliminate IR drop error in high-current PCB traces, maintaining ±0.5% regulation at load point. |
| Adaptive COT control | Internal ramp compensation ensures stability with zero-ESR MLCCs across full VIN/VOUT range - no external compensation required. |
| Pre-bias start-up | Monotonic startup into pre-charged outputs prevents reverse current flow and avoids system reset during hot-swap or rail sequencing. |
| Programmable soft-start | TRK/REF capacitor sets soft-start time (e.g., 100 nF = 1.6 ms); eliminates need for external timers or RC networks. |
| Non-latched fault protection | OCP, OVP, UVP, OTP, and UVLO auto-recover after fault clears - avoids latch-up during transient overloads or brownouts. |
Applications
| Telecom Base Station RF Power Supply | FPGA Core Voltage Rail |
|---|---|
Use Scenario: Provides clean, tightly regulated 1.2 V @ 8 A to Xilinx Versal or Intel Stratix 10 FPGA core logic under dynamic load transients up to 5 A/µs. IC Role / Device Role / Timing Role: Primary point-of-load regulator with differential remote sense and adaptive COT control ensuring sub-10 mV droop during 10 A load steps. Use Value: Eliminates need for external inductor and compensation network, reducing BOM count by 12 components and saving 220 mm² PCB area. |
Use Scenario: Powers ASIC SoC in 5G small-cell radio unit requiring monotonic startup into pre-biased 0.85 V rail during hot-plug insertion. IC Role / Device Role / Timing Role: Pre-bias start-up enabled buck module delivering 0.85 V @ 7 A with <1.6 ms soft-start and 160°C thermal shutdown. Use Value: Prevents reverse current injection into powered-backplane, avoiding data corruption and meeting GR-63-CORE reliability requirements. |
| Industrial PLC CPU Power | Server DDR5 Memory VDDQ Converter |
Use Scenario: Supplies 3.3 V @ 6 A to ARM Cortex-A72-based controller in harsh industrial environment with 40–85°C ambient and 12 V input bus. IC Role / Device Role / Timing Role: High-efficiency step-down module operating in forced CCM at 800 kHz with integrated inductor and 30°C thermal hysteresis. Use Value: Achieves >92% efficiency at full load, reducing thermal design complexity and eliminating discrete MOSFET thermal derating calculations. |
Use Scenario: Generates 1.1 V @ 5 A for DDR5 memory VDDQ rail in edge server, supporting JEDEC JESD209-5A fast-slew load transients. IC Role / Device Role / Timing Role: Ultrafast transient response buck module with 1000 kHz switching and 50 ns minimum on-time for precise voltage positioning. Use Value: Maintains <±15 mV regulation window during 3 A load steps, satisfying DDR5 VDDQ ripple specification without additional LC filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down power module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPM3683GQN-10 | Higher 10 A continuous rating, same package, updated thermal design and improved efficiency above 6 A. | Direct replacement for new designs requiring higher current headroom or extended lifetime under sustained 8–10 A loads. | Select for new designs - MPM3683GQN-7 is Not Recommended for New Designs per MPS documentation. |
| TPSM84824IRVCR | TI 8 A module with 4.5–17 V input, fixed 1.2 V output, no TRK/REF or MODE pin; requires external soft-start. | Suitable only for fixed-output, non-tracking applications where remote sense and programmable frequency are unnecessary. | Choose only if design mandates TI ecosystem compatibility and sacrifices flexibility in output adjustability and sequencing. |
Compared with MPM3683GQN-7, the MPM3683GQN-10 offers higher current capability and updated reliability specs, while the TPSM84824IRVCR trades configurability for simplified fixed-output integration - making the -7 viable only for legacy redesigns with strict footprint constraints.
Availability
MPM3683GQN-7 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and FPGA-based embedded systems requiring stable component supply amid ongoing obsolescence management.
Supply support for MPM3683GQN-7 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 power management ICs and modules, headquartered in Kirkland, WA, with global design and support centers.
The MPM3683 series targets high-density, high-reliability DC/DC conversion in space-constrained applications such as 5G infrastructure, enterprise servers, and industrial automation - emphasizing integration, thermal robustness, and ease of use.
FAQ
Is MPM3683GQN-7 recommended for new designs?
No - MPS explicitly labels MPM3683GQN-7 as "NOT RECOMMENDED FOR NEW DESIGNS" in its official documentation and directs users to the MPM3683GQN-10 for all new projects. The -10 variant features improved thermal performance, higher current rating, and updated qualification testing, while maintaining pin and footprint compatibility.
What is the function of the TRK/REF pin beyond soft-start timing?
The TRK/REF pin serves dual roles: it sets soft-start time via an external capacitor (e.g., 100 nF = 1.6 ms), and acts as an analog tracking input accepting 0.3–1.4 V signals to force the output voltage to follow an external reference - enabling coordinated power sequencing with other rails or precision analog bias generation.
How does the MODE pin configure both switching frequency and light-load mode?
The MODE pin selects one of six configurations via resistor-to-AGND or resistor-to-VCC: three values (GND, 34.8 kΩ, 80.6 kΩ) set 600/800/1000 kHz frequency, and two connections (VCC or float) select pulse-skip mode, while GND forces CCM - allowing independent optimization of efficiency (pulse-skip) versus ripple/noise (CCM) across load conditions.
Can MPM3683GQN-7 operate with no external output capacitors?
No - although stable with zero-ESR MLCCs, the device requires ≥132 µF total output capacitance (e.g., six 22 µF X5R/X7R ceramics) as specified in the EVM design. Omitting output caps causes instability, excessive ripple (>100 mV), and potential PG false triggering due to Vo Sense+ undershoot during load steps.
What is the maximum allowable ambient temperature for 8 A continuous operation?
At 8 A continuous load with 2-layer 2 oz copper PCB and 200 LFM airflow, the maximum ambient temperature is 65°C per thermal derating curves (Figure 9). Above this, output current must be reduced linearly to maintain ≤125°C junction temperature - e.g., 7 A at 85°C ambient.
Does the PG signal indicate regulation status of Vo Sense+ or VOUT directly?
PG reflects regulation status of the Vo Sense+ pin, not the VOUT pad - meaning it validates feedback loop integrity at the remote sense point. If Vo Sense+ is disconnected or misrouted, PG may assert prematurely or fail to assert even with correct VOUT, making proper Vo Sense+ layout essential for reliable system monitoring.
How is current limit programmed using the CS pin?
A resistor from CS to AGND sets the overcurrent threshold: RCS = 1.2 V / ILIM. For example, a 120 kΩ resistor yields 10 µA × 120 kΩ = 1.2 V → 10 A current limit. The device uses valley-current limiting with non-latched shutdown and automatic restart after fault clearance.
MPM3683GQN-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 28-PowerBQFN Module
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- Non-Isolated PoL Module
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 16V
- Voltage - Output 1:
- 0.6 ~ 5.5V
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 8A
- Power (Watts):
- -
- Voltage - Isolation:
- -
- Applications:
- ITE (Commercial)
- Features:
- OCP, OTP, OVP, UVLO
- Operating Temperature:
- -40°C ~ 125°C
- Efficiency:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-QFN (7x7)
- Control Features:
- -
- Approval Agency:
- -
- Standard Number:
- -
MPM3683GQN-7 FAQ
1.How can I place an order for MPM3683GQN-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPM3683GQN-7 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 MPM3683GQN-7 reliable?
The price and inventory of MPM3683GQN-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPM3683GQN-7 is usually 5 days.
3.What payment methods are accepted for MPM3683GQN-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPM3683GQN-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPM3683GQN-7?
MPM3683GQN-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPM3683GQN-7 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 MPM3683GQN-7?
For technical support, including MPM3683GQN-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPM3683GQN-7 requirements.
6.How does Aetrix verify that MPM3683GQN-7 is sourced from the original manufacturer or authorized distributors?
All MPM3683GQN-7 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 MPM3683GQN-7 meets industry standards.
7.What is the process for return or replacement of MPM3683GQN-7?
All MPM3683GQN-7 units undergo pre-shipment inspection (PSI). If there is an issue with MPM3683GQN-7, 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 MPM3683GQN-7 part is unused and in its original packaging.
Return procedure for MPM3683GQN-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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