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Monolithic Power Systems Inc. MPM3690GBF-50B-T
- Part No.:
- MPM3690GBF-50B-T
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Converters
- Package:
- 144-BBGA Module
- Datasheet:
-
MPM3690GBF-50B-T.pdf
- Description:
- DC DC CONVERTER 1.8V
- Quantity:
- Payment:
- Shipping:
Inventory:113
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Product details
Overview
MPM3690GBF-50B-T from Monolithic Power Systems is a single-output 50A DC/DC power module with integrated inductors and MOSFETs, operating from 4V–16V input to deliver 0.6V–1.8V output. It uses multi-phase constant-on-time (MCOT) control for ultra-fast transient response, supports differential remote sensing, and delivers up to 95% peak efficiency at 12VIN/1.2VOUT. It targets high-current FPGA core rails in telecom infrastructure.
For engineers reviewing the MPM3690GBF-50B-T datasheet, MPM3690GBF-50B-T pinout, MPM3690GBF-50B-T application, or MPM3690GBF-50B-T equivalent, this page provides verified electrical parameters, BGA package layout, MCOT control behavior, thermal derating curves, and validated alternatives for high-density 50A point-of-load designs.
Technical Context
The MPM3690GBF-50B-T implements interleaved dual-phase MCOT control with master-slave synchronization, enabling 50ns minimum inter-phase on-pulse spacing for sub-microsecond load step recovery. Its internal RAMP compensation adjusts loop stability for ceramic/POSCAP output capacitor combinations.
It integrates two monolithic buck controllers, power inductors, gate drivers, and protection circuitry into a single BGA package. The device operates exclusively in forced continuous conduction mode (FCCM), configured via MODE pin high, and supports programmable soft-start (via SS1/SS2 capacitors) and switching frequency (via FSET1/FSET2 resistors).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 50A continuous single-channel output - enables replacement of discrete multi-phase controllers + external inductors in space-constrained systems. |
| Input Voltage Range | 4V to 16V - compatible with 5V, 12V intermediate bus architectures and supports 3.2V operation with external 3.3V VCC bias. |
| Output Voltage Range | 0.6V to 1.8V - covers core voltage requirements for modern FPGAs (e.g., Xilinx Versal, Intel Agilex) and ASICs. |
| Switching Frequency | 400kHz to 1MHz - adjustable via external resistor; higher frequencies reduce output capacitor size but increase switching loss. |
| Feedback Accuracy | ±1% (594–606mV) - ensures tight regulation under dynamic load conditions critical for logic core stability. |
| Thermal Shutdown Threshold | 160°C junction temperature - triggers hiccup or latch-off based on PMODE pin state, preventing permanent silicon damage. |
| Efficiency (Typ.) | 95% at 12VIN/1.2VOUT/50A - reduces thermal load and simplifies heatsink design in sealed telecom chassis. |
Pinout & Package
BGA package: 16mm × 16mm × 5.18mm, 144-pin grid (12×12), MSL Level 3, lead-free/halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (M2–M11, L2–L11, J2–J4, J9–J11, K2–K4, K9–K11) | Primary input power supply | Distributed high-current input pads minimize IR drop and improve EMI performance across wide input range. |
| VOUT2 (A8–A12, B8–B12, C9–C12) | Single 50A output power rail | Parallelized output pins reduce current density per bond wire and PCB trace, supporting >50A DC delivery. |
| GND (A1–A5, B1–B5, C1–C4, A6–A7, B6–B7, D1–D4, D9–D12, E1–E4, E10–E12, F1–F3, F6–F7, F10–F12, G1, G3, G7, G10, G12, H1–H7, H9–H12, J1, J5, J8, J12, K1, K5–K8, K12, L1, L12, M1, M12) | Power ground reference | Extensive GND array provides low-inductance return path essential for fast transient suppression and noise immunity. |
| FB2 (D7) | Output voltage feedback node | Connects to VS2N via resistor divider to set 0.6–1.8V output; 600mV internal reference enables precise core rail regulation. |
| EN2 (F9) | Channel enable control | Active-high logic input; must be driven (not floated); enables synchronized startup/shutdown with external sequencer. |
| PG2 (G8) | Power-good status indicator | Open-drain output asserting high when FB2 reaches 92.5%–96.5% of VREF - used for system-level power sequencing validation. |
| FSET2 (E7) | Switching frequency configuration | Resistor-to-GND sets fSW; matched FSET1/FSET2 required for MPM3690GBF-50B-T to ensure phase synchronization. |
| VS2P / VS2N (C8 / C7) | Differential remote sense inputs | Enable Kelvin sensing at load point to compensate for PCB IR drop - critical for <±1% output accuracy at 50A. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-phase COT control | Enables 50ns minimum inter-phase on-time spacing for <1µs load transient recovery without external compensation. |
| Differential remote sensing | VS2P/VS2N pair eliminates PCB trace resistance error, maintaining ±0.5% output regulation at full 50A load. |
| Programmable soft-start | SS2 capacitor sets tSS = 30 × CSS(µF) ms - prevents inrush current damage to downstream capacitors and ICs. |
| Configurable protection mode | PMODE pin selects hiccup (pull-up) or latch-off (pull-down) response to OCP/OVP/OTP - matches system fault-handling policy. |
| Integrated power train | Monolithic buck ICs + 0.22µH inductors + MOSFETs in one BGA - eliminates 24+ external components vs. discrete solutions. |
Applications
| Telecom Baseband Processing | FPGA Core Power Delivery |
|---|---|
|
Use Scenario: High-density 5G baseband units requiring stable 1.2V/50A for Xilinx Versal AI Core processors under burst traffic loads. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering FPGA core voltage with <100ns transient response to logic switching events. Use Value: Eliminates need for external phase-interleaving controllers and discrete inductors, reducing board area by 45% vs. dual-MPM3690-20B solution. |
Use Scenario: AI accelerator card with dual Intel Agilex F-Series FPGAs demanding tightly regulated 0.8V/45A per die. IC Role / Device Role / Timing Role: Single-rail 50A power module supplying combined core voltage with differential remote sense for <±0.5% accuracy. Use Value: Achieves 94.2% efficiency at 0.8V/50A, cutting thermal dissipation by 3.1W compared to MPM3690-30B-based designs. |
| Industrial Edge AI Server | Optical Line Terminal (OLT) Line Cards |
|
Use Scenario: Fanless edge inference server operating at 65°C ambient, powering NVIDIA Jetson Orin NX modules. IC Role / Device Role / Timing Role: High-current POL converter with thermal derating support down to 40A at 70°C ambient (1m/s airflow). Use Value: Built-in OTP with 30°C hysteresis prevents thermal runaway during sustained AI workloads without external monitoring. |
Use Scenario: Carrier-grade OLT line card with PON transceivers requiring clean 1.5V/50A supply immune to upstream RF noise. IC Role / Device Role / Timing Role: Low-noise, FCCM-mode power module with integrated EMI filtering and spread-spectrum capability (via FSET). Use Value: Meets GR-1089 Class B emissions without additional shielding, accelerating NEBS compliance testing cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current DC/DC power module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPM3690GBF-30B | Single 36A output, 0.6–3.3V output range, same 16mm×16mm BGA footprint | Lower current capacity limits use in 50A FPGA core rails; suitable for 36A ASIC I/O banks | Select when output voltage >1.8V is required or thermal margin allows derated 36A operation. |
| MPM3690GBF-50A | Dual 25A outputs, identical electrical specs except independent FB1/FB2 and EN1/EN2 control | Supports split-rail architectures (e.g., 1.2V + 0.85V) but requires separate sequencing and sense networks | Choose for applications needing isolated 25A rails with independent voltage programming and fault management. |
Compared with MPM3690GBF-30B and MPM3690GBF-50A, the MPM3690GBF-50B-T delivers highest single-rail current density in the family, eliminates inter-rail coupling concerns, and simplifies layout by consolidating all 50A current paths into one optimized VOUT2 net.
Availability
MPM3690GBF-50B-T is available at Aetrix Electronics and suitable for telecom baseband processing, FPGA core power delivery, industrial edge AI servers, and optical line terminal line cards requiring stable component supply across extended product lifecycles.
Supply support for MPM3690GBF-50B-T 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 MPM3690 series was designed specifically for high-current, low-voltage point-of-load applications in datacenter, networking, and AI hardware - emphasizing integration, thermal robustness, and transient performance over discrete alternatives.
FAQ
What is the maximum allowable input voltage for MPM3690GBF-50B-T?
The absolute maximum VIN rating is 18V, but the recommended operating range is 4V to 16V. Operation above 16V risks permanent damage even for short durations. With external 3.3V VCC bias, the functional input range extends down to 3.2V while maintaining regulation and protection functionality.
How does the MCOT control architecture improve transient response?
MCOT enables master-slave phase synchronization with 50ns minimum inter-phase on-pulse spacing. When a load step occurs, the FB voltage dip triggers immediate SET signal generation in both phases, achieving <1µs recovery time - significantly faster than traditional current-mode controllers limited by loop bandwidth and compensation delays.
Can MPM3690GBF-50B-T operate without remote sensing?
Yes. Connect VS2N directly to local GND and leave VS2P unconnected (or tie to VOUT2) to disable remote sensing. This configures the device for local feedback only, reducing component count but accepting ~15mV regulation error due to PCB trace IR drop at 50A.
What is the purpose of the RAMP2 pin, and how should it be configured?
RAMP2 selects internal slope compensation magnitude: floating enables high ramp (improved stability with ceramic output caps), grounding enables low ramp (faster transient response with POSCAP/low-ESR polymer caps). Selection depends on output capacitor ESR and target trade-off between jitter and load-step speed.
Does MPM3690GBF-50B-T support power sequencing with other rails?
Yes. EN2 and PG2 provide dedicated enable and power-good signals for coordination with upstream/downstream converters. PG2 asserts high after FB2 reaches 92.5% of VREF and deasserts if VOUT drops below 74% VREF, enabling reliable daisy-chained sequencing in multi-rail systems.
What thermal derating applies at 70°C ambient with 1m/s airflow?
At 70°C ambient and 1m/s airflow, the MPM3690GBF-50B-T delivers 40A continuously (Figure 13). Derating is linear from 50A at 25°C to 40A at 70°C, then follows the 160°C thermal shutdown threshold with 30°C hysteresis for safe recovery.
Is external VCC bias required for normal operation?
No. VCC is internally generated from VIN and powers internal circuitry. However, connecting an external 3.3V supply to VCC improves light-load efficiency by ~1.2% and extends minimum input voltage to 3.2V - optional but recommended for 5V-input systems with tight efficiency targets.
MPM3690GBF-50B-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MPM
- Package/Case:
- 144-BBGA Module
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- Non-Isolated PoL Module
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 16V
- Voltage - Output 1:
- 0.6 ~ 1.8V
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 50A
- Power (Watts):
- -
- Voltage - Isolation:
- -
- Applications:
- ITE (Commercial)
- Features:
- Adjustable Output, Remote Sense
- Operating Temperature:
- -40°C ~ 125°C (With Derating)
- Efficiency:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 144-BGA (16x16)
- Control Features:
- Enable, Active High
- Approval Agency:
- -
- Standard Number:
- -
MPM3690GBF-50B-T FAQ
1.How can I place an order for MPM3690GBF-50B-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MPM3690GBF-50B-T 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 MPM3690GBF-50B-T reliable?
The price and inventory of MPM3690GBF-50B-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPM3690GBF-50B-T is usually 5 days.
3.What payment methods are accepted for MPM3690GBF-50B-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPM3690GBF-50B-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPM3690GBF-50B-T?
MPM3690GBF-50B-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPM3690GBF-50B-T 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 MPM3690GBF-50B-T?
For technical support, including MPM3690GBF-50B-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPM3690GBF-50B-T requirements.
6.How does Aetrix verify that MPM3690GBF-50B-T is sourced from the original manufacturer or authorized distributors?
All MPM3690GBF-50B-T 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 MPM3690GBF-50B-T meets industry standards.
7.What is the process for return or replacement of MPM3690GBF-50B-T?
All MPM3690GBF-50B-T units undergo pre-shipment inspection (PSI). If there is an issue with MPM3690GBF-50B-T, 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 MPM3690GBF-50B-T part is unused and in its original packaging.
Return procedure for MPM3690GBF-50B-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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