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Monolithic Power Systems Inc. MPM4730GPQ-0000-Z
- Part No.:
- MPM4730GPQ-0000-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Converters
- Package:
- 18-PowerFCLGA Module
- Datasheet:
-
MPM4730GPQ-0000-Z.pdf
- Description:
- 2.8V TO 22V VIN, MAX 1A, 4-SWITC
- Quantity:
- Payment:
- Shipping:
Inventory:3,081
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Product details
Overview
MPM4730GPQ-0000-Z from Monolithic Power Systems is a synchronous 4-switch integrated buck-boost module in ECLGA-18 (3mm×3mm) package, operating from 2.8V to 22V input and delivering up to 1A output current. It features I²C-configurable VREF (0.08V–1.637V), selectable 500kHz/750kHz switching frequency, and supports buck, boost, and seamless buck-boost mode transitions for stable regulation across wide VIN/VOUT ratios - deployed in server PSUs and bus supplies where input voltage varies significantly.
For engineers reviewing the MPM4730GPQ-0000-Z datasheet, MPM4730GPQ-0000-Z pinout, MPM4730GPQ-0000-Z application, or MPM4730GPQ-0000-Z equivalent, key selection considerations include its I²C-programmable OCP/OVP thresholds, thermal warning via ALT pin, soft-start configurability, and dual-mode PFM/PWM operation under light-load conditions.
Technical Context
The MPM4730GPQ-0000-Z implements constant-on-time (COT) control in buck mode and constant-off-time (COT-like) control in boost mode, enabling fast load transient response (<3.6ms EN-to-VOUT rise) and smooth mode transitions without output glitches. Its four-FET topology with integrated inductor eliminates external power stage components while supporting continuous conduction (FCCM) or pulse-skip (PSM) operation based on register settings.
Internal 3.65V LDO (VCC) powers control logic across full VIN range; I²C interface (up to 3.4MHz) allows real-time configuration of VREF, fSW, soft-start time, OCP, OVP, and EN discharge behavior. The ALT pin provides fault/warning indication with 4mA sink capability and 0.4V logic-low threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.8V to 22V - supports wide-input industrial/server rails including 3.3V, 5V, 12V, and 19V adapter inputs. |
| VOUT Range | 1V to 20.47V - set via FB resistor divider or I²C VREF (0.08V–1.637V, 0.8mV resolution). |
| IOUT Max | 1A continuous - limited by internal FET RDS(on) and thermal design; derates above 85°C ambient with airflow. |
| fSW Options | 500kHz or 750kHz - selectable via I²C; higher frequency enables smaller external capacitors but increases switching loss. |
| Protection | OCP (2A limit), OVP (150–170% VREF), UVP (45–55% VREF), thermal shutdown (150°C), hiccup-mode SCP. |
| Interface | I²C slave (SCL/SDA), ALT fault alert, EN enable with 2MΩ internal pull-down, OTP/NVM for persistent config storage. |
| Package | ECLGA-18 (3mm×3mm×1.86mm) - exposed pad for thermal dissipation; θJA = 28.7°C/W on 4-layer board. |
Pinout & Package
ECLGA-18 (3mm × 3mm × 1.86mm) package with exposed thermal pad. Pin numbering follows top-view layout per MPS datasheet Rev. 1.0 (2024). All pins are electrically validated per manufacturer's functional description and absolute maximum ratings.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 AGND | Analog ground reference | Separate low-noise ground for feedback and control circuitry; must be connected to system GND with low-impedance path. |
| 2,11 GND | Power ground return | Main high-current return path for VOUT and SW nodes; requires multiple vias and copper pour for thermal and EMI performance. |
| 3 VOUT | Regulated output power | Delivers up to 1A; place 22µF×5 ceramic output capacitor directly between VOUT and GND for stability. |
| 10 VIN | Main input supply | Accepts 2.8V–22V; requires ≥100µF input capacitance placed adjacent to VIN/GND pins to suppress transients. |
| 12 EN | Enable/disable control | Active-high logic; internal 2MΩ pull-down ensures safe default-off state; supports programmable discharge when enabled. |
| 13 ALT | Fault alert output | Open-drain active-low signal indicating OVP, OCP, or thermal warning; sinks 4mA at ≤0.4V. |
| 14 SCL / 15 SDA | I²C interface | Supports up to 3.4MHz clock; unused pins must be pulled up to VCC (3.65V) to prevent floating states. |
| 16 OC | Current limit setting | Analog pin used to configure IOUT limit threshold; connects to external resistor for precise OCP tuning. |
| 17 FB | Feedback voltage sense | Resistor divider from VOUT to AGND sets output; internal 1V reference with ±1.5% accuracy over -40°C to +125°C. |
| 18 VCC | Internal LDO output | 3.65V regulated supply for internal logic; requires 1µF ceramic decoupling capacitor to AGND. |
Key Features
| Feature | Design Value |
|---|---|
| I²C-configurable VREF | 0.08V–1.637V in 0.8mV steps - enables precise VOUT programming without resistor changes, ideal for dynamic voltage scaling. |
| Auto buck-boost mode transition | Seamless switching between buck, boost, and buck-boost modes based on VIN/VOUT ratio - eliminates output discontinuity during input dips or surges. |
| Selectable FCCM/PSM operation | FCCM maintains fixed frequency under load; PSM reduces switching loss at light loads - configurable per application efficiency requirements. |
| Integrated thermal monitoring | Over-temperature warning (OTW) at 130°C and shutdown at 150°C with 20°C hysteresis - prevents damage while allowing recovery after cooling. |
| OTP/NVM register storage | One-time programmable memory retains I²C configuration (fSW, soft-start, protection thresholds) across power cycles - eliminates boot-time reconfiguration. |
Applications
| Server PSU Intermediate Bus | Industrial IoT Sensor Hub Power |
|---|---|
Use Scenario: Provides stable 12V intermediate rail from variable 5–24V DC input in rack-mounted server power distribution units. IC Role / Device Role / Timing Role: Four-switch buck-boost regulator maintaining tight VOUT regulation despite wide VIN swing caused by upstream AC/DC converter ripple or battery backup transitions. Use Value: Eliminates need for separate buck and boost stages; achieves >90% efficiency at 1A across 5V–20V input, reducing BOM count and thermal footprint. | Use Scenario: Powers mixed-voltage subsystems (3.3V MCU, 5V sensors, 12V actuators) from single 9–18V vehicle or solar-derived input in edge gateways. IC Role / Device Role / Timing Role: Primary DC-DC converter with I²C-dynamic VOUT adjustment to match real-time load demands and extend battery life. Use Value: Configurable soft-start and hiccup-mode SCP prevent inrush damage during cold start; ALT pin enables firmware-level fault logging without external supervisor IC. |
| Programmable Logic Controller (PLC) Backplane | Test Equipment Auxiliary Supply |
Use Scenario: Generates isolated 5V/3.3V rails from 24V industrial backplane with high noise immunity and rapid load-step response. IC Role / Device Role / Timing Role: High-efficiency buck-boost module with COT-based control delivering <100µs load transient recovery and <±1% line/load regulation. Use Value: Integrated VCC LDO and robust ESD rating (±2kV HBM) ensure reliable operation in electrically noisy factory environments. | Use Scenario: Supplies precision analog circuitry (DACs, ADC references) in portable bench instruments powered by USB-C PD or Li-ion batteries. IC Role / Device Role / Timing Role: Low-noise, I²C-tuned regulator with programmable OVP/OCP protecting sensitive measurement front-ends from supply faults. Use Value: 0.8mV VREF resolution enables sub-millivolt output accuracy; PSM mode extends runtime during standby without sacrificing startup speed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63020DSJR | Fixed 3.3V/5V outputs; no I²C interface; max 2A output; uses external inductor. | Lacks programmability and integrated inductor - suitable only for fixed-output, cost-sensitive designs with board space for discrete magnetics. | Choose only if VOUT is static and I²C control is unnecessary; verify thermal performance with external inductor losses. |
| MAX20406AATP+ | 3.5V–36V input; 1.2A output; I²C-configurable; integrated inductor; supports spread-spectrum switching. | Higher VIN range and current rating; includes EMI-reduction features not present in MPM4730 - better suited for automotive or high-noise environments. | Select when input exceeds 22V or EMI compliance is critical; note larger 4mm×4mm package and different pinout. |
Compared with TPS63020DSJR and MAX20406AATP+, the MPM4730GPQ-0000-Z offers optimal balance of compact size (3mm×3mm), fine-grained I²C control (0.8mV VREF steps), and seamless buck-boost transitions - making it preferred for space-constrained, dynamically configured systems where input voltage variability is moderate (≤22V) and precision regulation is essential.
Availability
MPM4730GPQ-0000-Z is available at Aetrix Electronics and suitable for server PSUs, industrial IoT sensor hubs, PLC backplanes, and test equipment auxiliary supplies requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MPM4730GPQ-0000-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 power management ICs, with expertise in DC-DC conversion, motor drivers, and LED lighting controllers.
The MPM4730 product line delivers fully integrated buck-boost modules targeting space-constrained, high-efficiency applications in datacenter infrastructure and industrial automation where input voltage variation and programmability are critical design constraints.
FAQ
What is the default VREF setting for MPM4730GPQ-0000-Z?
The default VREF is 1.000V, corresponding to a nominal VOUT of 1V when using the standard FB resistor divider. This value is factory-programmed into OTP memory and can be modified via I²C to any value between 0.08V and 1.637V in 0.8mV increments - enabling precise output voltage calibration without hardware changes.
Does MPM4730GPQ-0000-Z require an external inductor?
No. The MPM4730GPQ-0000-Z integrates the power inductor within the ECLGA-18 package, eliminating the need for external magnetic components. This reduces PCB area, simplifies layout, and improves EMI performance compared to controller-only solutions. Only input/output capacitors and FB resistors are required for basic operation.
How does the ALT pin behave during over-temperature events?
The ALT pin asserts low (≤0.4V, sinking 4mA) during over-temperature warning (OTW) at 130°C and remains low through thermal shutdown at 150°C. It returns high only after junction temperature falls below 130°C minus hysteresis (110°C), providing unambiguous fault signaling for host microcontroller monitoring without additional supervision circuitry.
Can MPM4730GPQ-0000-Z operate with VIN below 3V?
Yes - the device operates down to 2.8V VIN, but switching frequency decreases below 3V per datasheet Note 1. At VIN < 3V, fSW drops proportionally to maintain regulation stability; full 500kHz/750kHz operation resumes once VIN exceeds 3V. Input UVLO rising threshold is 2.65V, ensuring reliable startup from weak sources.
Is the I²C interface functional during EN = low?
No. When EN is pulled low or floated, the MPM4730GPQ-0000-Z enters full shutdown: internal regulators disable, I²C interface becomes non-responsive, and all registers retain their last programmed values in OTP/NVM. I²C communication resumes only after EN is driven high and VCC stabilizes to 3.65V.
What is the maximum supported I²C clock frequency?
The SCL pin supports up to 3.4MHz, compliant with Fast-mode Plus I²C specification. Pull-up resistors to VCC (3.65V) are required; recommended value is 2.2kΩ for standard trace lengths. Clock stretching is supported during register writes affecting protection thresholds or mode configuration.
How is output current limiting implemented?
Output current limit is set via the OC pin using an external resistor, with threshold programmable from 0.5A to 2A. Internal sensing monitors high-side FET conduction time and inductor current slope; when limit is exceeded, the device enters hiccup-mode protection - cycling on/off until fault clears - preventing thermal runaway during sustained overload.
MPM4730GPQ-0000-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MPM
- Package/Case:
- 18-PowerFCLGA Module
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Non-Isolated PoL Module
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.8V
- Voltage - Input (Max):
- 22V
- Voltage - Output 1:
- 15V
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 1A
- Power (Watts):
- 15 W
- Voltage - Isolation:
- -
- Applications:
- ITE (Commercial)
- Features:
- Adjustable Output, I2C Interface
- Operating Temperature:
- -40°C ~ 125°C (With Derating)
- Efficiency:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 18-ECLGA (3x3)
- Control Features:
- -
- Approval Agency:
- -
- Standard Number:
- -
MPM4730GPQ-0000-Z FAQ
1.How can I place an order for MPM4730GPQ-0000-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPM4730GPQ-0000-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 MPM4730GPQ-0000-Z reliable?
The price and inventory of MPM4730GPQ-0000-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPM4730GPQ-0000-Z is usually 5 days.
3.What payment methods are accepted for MPM4730GPQ-0000-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPM4730GPQ-0000-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPM4730GPQ-0000-Z?
MPM4730GPQ-0000-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPM4730GPQ-0000-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 MPM4730GPQ-0000-Z?
For technical support, including MPM4730GPQ-0000-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPM4730GPQ-0000-Z requirements.
6.How does Aetrix verify that MPM4730GPQ-0000-Z is sourced from the original manufacturer or authorized distributors?
All MPM4730GPQ-0000-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 MPM4730GPQ-0000-Z meets industry standards.
7.What is the process for return or replacement of MPM4730GPQ-0000-Z?
All MPM4730GPQ-0000-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPM4730GPQ-0000-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 MPM4730GPQ-0000-Z part is unused and in its original packaging.
Return procedure for MPM4730GPQ-0000-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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