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Monolithic Power Systems Inc. MP2984GR-Z
- Part No.:
- MP2984GR-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
MP2984GR-Z.pdf
- Description:
- 36V, SYNCHRONOUS BUCK-BOOST CONT
- Quantity:
- Payment:
- Shipping:
Inventory:4,647
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Product details
Overview
MP2984GR-Z from Monolithic Power Systems is a synchronous quad-switch buck-boost DC/DC controller supporting 5V–36V input and 0.5V–28V programmable output, with I²C-configurable VOUT, slew rate, and constant-current limit. It implements valley current control in buck mode and peak current control in boost mode for fast transient response, and integrates current monitoring (IMON), adjustable OCP via IPWM, and full protection including OVP, OCP, and UVLO hysteresis. It targets USB PD Type-C power supplies requiring dynamic voltage negotiation.
For engineers reviewing the MP2984GR-Z datasheet, MP2984GR-Z pinout, MP2984GR-Z application, or MP2984GR-Z equivalent, this page delivers verified technical context on its dual-mode control architecture, I²C register mapping for VOUT and ILIM, IMON analog current-sense interface, QFN-32 package thermal performance, and USB PD compliance requirements including 5V/9V/12V/15V/20V profile support.
Technical Context
The MP2984GR-Z uses hybrid current-mode control: valley sensing in buck operation ensures stability under light loads, while peak sensing in boost mode enables precise current limiting during high-side conduction. Its four external MOSFET drivers (HG1/LG1/HG2/LG2) support independent gate timing with 30ns dead-time and ±1.6A sink capability.
I²C interface provides real-time configuration of 12-bit VREF (0.5–2.047V), 11-bit VOUT setpoint, slew rate (25–170 mV/ms), and constant-current limit (32–68mV sense threshold). The IPWM pin accepts 20kHz PWM signals to dynamically scale the current limit in <50mA steps without I²C traffic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 5V to 36V operating; 6V to 36V start-up - supports wide-input industrial and USB PD adapters. |
| VOUT Range | 0.5V to 28V via I²C - enables full USB PD 3.0 profile negotiation (5V/9V/12V/15V/20V). |
| fSW Options | 200/300/400/600 kHz with spread spectrum - reduces EMI peaks while maintaining loop bandwidth >10 kHz. |
| Current Sense | IMON analog output (16.9–20.7 V/V gain); CSP/CSN differential inputs - enables accurate load current reporting for PD firmware. |
| OCP Adjustment | Configurable ILIM bits (32/45/56/68mV) + IPWM dimming (±5% resolution) - allows fine-grained overcurrent margin tuning per output profile. |
| Protection | OVP (119–135% VREF), OCP, SCP, OTP (150°C), UVLO hysteresis - supports robust fault recovery in unattended USB-C chargers. |
| Package | QFN-32 (4mm × 4mm, 0.5mm pitch) - provides θJA = 28°C/W on 6-layer EV board for ≤5A continuous output. |
Pinout & Package
MP2984GR-Z is housed in a thermally enhanced QFN-32 (4mm × 4mm) package with exposed thermal pad. Pin 1 is at top-left corner (SDA), and pins are numbered counter-clockwise. The package supports reflow soldering per JEDEC J-STD-020 and achieves 4.4W max continuous power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SDA | I²C data line | Open-drain bidirectional interface for register read/write; requires 4.7kΩ pull-up to AVDD. |
| 3 INT | Fault interrupt output | Open-drain signal pulled low on OC/OT/OV/PNG events; enables host MCU fault logging without polling. |
| 4 IPWM | Current limit modulation input | Accepts 20kHz PWM to scale IOUT_LIMIT in real time; internal 1MΩ pull-up sets default 100% duty. |
| 5 CSP / 6 CSN | Differential current sense inputs | Measure switch-node current for valley/peak control; reject common-mode noise up to ±1V. |
| 10 IMON | Analog current monitor output | Voltage proportional to average load current (gain = 16.9–20.7 V/V); feeds ADC for closed-loop PD reporting. |
| 15 ILIM | Startup current limit select | Two-level voltage setting (0.23–0.74×AVDD) configures default ILIM bits (001–111) before I²C initialization. |
| 16–17 IAVGN/IAVGP | Average current limit sense | Connect across output rail to set constant-current regulation point; referenced to internal 1.2V VINREG. |
| 25–28 LG1/HG1/SW1/BST1 | Buck stage gate drivers | Drive external high-side and low-side MOSFETs; BST1 capacitor bootstraps HG1 above SW1. |
| 19–22 SW2/HG2/LG2/BST2 | Boost stage gate drivers | Independent boost FET control; BST2 can be powered from VCC or BST1 for flexible layout. |
| 29 VIN | Main input supply and sense | Supplies internal bias and enables UVLO hysteresis; also used for minimum VIN regulation via VINREG pin. |
| 30 EN | Enable and UVLO configuration | Pull high ≥1.35V to enable; voltage level sets UVLO rising/falling thresholds for input brown-out immunity. |
| 32 ADDR | I²C slave address select | Four voltage levels (0.23–0.74×AVDD) set I²C address to 60H/62H/64H/66H for multi-device bus addressing. |
Key Features
| Feature | Design Value |
|---|---|
| Flexible I²C Configuration | Full register access to VOUT, slew rate, soft-start time, OCP threshold, and FSW - eliminates BOM variants for multiple output profiles. |
| Dynamic Current Limit Scaling | IPWM input adjusts IOUT_LIMIT in real time with <50mA resolution - enables adaptive current limiting during USB PD contract negotiation. |
| Integrated Current Monitoring | IMON analog output provides 16.9–20.7 V/V gain with ±5% accuracy - replaces external current-sense amplifier in PD firmware feedback loops. |
| Valley + Peak Hybrid Control | Valley sensing in buck and peak sensing in boost modes - delivers <50μs load transient response across full 0–5A range at 12V input. |
| Configurable UVLO Hysteresis | EN pin voltage sets VIN UVLO rising (5–5.9V) and falling (4.3–4.8V) thresholds - prevents cycling during input dips in automotive or industrial environments. |
Applications
| USB Power Delivery Adapter | Industrial PC Power Supply |
|---|---|
|
Use Scenario: 65W USB-C wall charger negotiating 5V/9V/12V/15V/20V profiles with laptops and peripherals. IC Role / Device Role / Timing Role: Primary buck-boost controller managing dual-MOSFET power stage, VOUT regulation, and real-time current reporting via IMON. Use Value: I²C programmability eliminates hardware revisions for new PD profiles; IPWM enables firmware-controlled current limiting during voltage transitions. |
Use Scenario: 24V input to 12V/5V dual-rail power supply for ruggedized IPCs with variable load demands. IC Role / Device Role / Timing Role: Synchronous buck-boost regulator maintaining stable output across wide input transients (e.g., 18–32V battery sag). Use Value: Valley/peak hybrid control ensures <50μs transient recovery; integrated OVP/OCP protects downstream FPGA and memory rails. |
| Programmable Lab Power Supply | Automotive Infotainment System |
|
Use Scenario: Bench power supply with digitally adjustable 0.5–28V output and constant-current mode for circuit testing. IC Role / Device Role / Timing Role: Core voltage controller accepting I²C commands for VOUT setpoint, slew rate, and CC limit; IMON provides real-time current readback. Use Value: 0.5V–28V range and 25–170 mV/ms slew control enable precise ramping; IMON analog output simplifies microcontroller ADC integration. |
Use Scenario: 12V vehicle battery to 5V/3.3V conversion for head unit display and audio subsystems with cold-crank immunity. IC Role / Device Role / Timing Role: Input-robust buck-boost regulator sustaining regulated output during 4.5–36V battery swings and load-dump transients. Use Value: 6V start-up and configurable UVLO hysteresis prevent shutdown during cranking; QFN-32 package meets AEC-Q200 thermal requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck-boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ2984-AUE | Automotive-grade (AEC-Q100 Grade 1), same pinout and register map, but with extended -40°C to +125°C junction temp and enhanced ESD (±8kV HBM). | Required for automotive infotainment or ADAS power rails where qualification and higher temperature operation are mandatory. | Select MPQ2984-AUE only when AEC-Q100 compliance and extended temperature range are required; otherwise MP2984GR-Z offers identical functionality at lower cost. |
| LT8708EFE#PBF | Linear Tech part with wider 2.8–80V VIN, no integrated I²C, requires external DAC for VOUT programming, and lacks IMON output. | Suitable for high-voltage industrial systems (>36V) where digital interface is handled by separate MCU and analog monitoring is acceptable. | Choose LT8708EFE#PBF only if input exceeds 36V or if legacy analog control architecture is preferred; MP2984GR-Z provides superior integration for USB PD and firmware-driven designs. |
Compared with MPQ2984-AUE, MP2984GR-Z trades automotive qualification for lower cost and standard commercial temperature range; versus LT8708EFE#PBF, it delivers native I²C configurability and IMON monitoring - reducing component count and firmware complexity in USB PD and programmable supply designs.
Availability
MP2984GR-Z is available at Aetrix Electronics and suitable for USB Power Delivery adapters, industrial PC power supplies, programmable lab sources, and automotive infotainment systems requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for MP2984GR-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MP2984 product line is engineered for USB PD 3.0-compliant power conversion, emphasizing I²C configurability, real-time current monitoring, and seamless buck-boost mode transition - targeting compact, software-defined power supplies.
FAQ
What is the minimum startup voltage for MP2984GR-Z?
The MP2984GR-Z requires a minimum 6V input to initiate switching, verified across -40°C to +125°C. This start-up threshold is distinct from its operating VIN range (5V–36V) and ensures reliable turn-on in USB PD applications where VBUS may ramp slowly during connection negotiation.
How does the IPWM pin adjust the current limit?
The IPWM pin accepts a 20kHz PWM signal whose duty cycle linearly scales the configured constant-current limit (e.g., 48% duty yields ~36mV threshold; 71.5% yields ~51.5mV). Internal 1MΩ pull-up sets default 100% duty, and an external 100kΩ resistor is recommended for noise immunity.
Can MP2984GR-Z operate in forced continuous conduction mode (FCCM)?
Yes, FCCM is enabled via I²C register bit configuration. In FCCM, the controller maintains continuous inductor current regardless of load, improving light-load regulation and reducing output voltage ripple - critical for noise-sensitive applications like audio subsystems.
What is the function of the VINREG pin?
VINREG sets the minimum regulated input voltage during operation. When connected to AVDD, it disables minimum VIN regulation. If left floating, it defaults to 1.2V reference, enabling the controller to maintain regulation even as VIN drops below nominal levels - useful in battery-powered systems.
Does MP2984GR-Z support spread-spectrum frequency modulation?
Yes, spread-spectrum modulation is enabled via I²C dither bit, providing ±6% frequency deviation at 2kHz modulation rate. This reduces EMI peak amplitudes without affecting loop stability, meeting CISPR-32 Class B conducted emission limits in compact USB-C adapters.
How is over-voltage protection (OVP) triggered and cleared?
OVP triggers when FB voltage exceeds 119–135% of VREF, pulling INT low. Recovery occurs automatically once FB falls below 104–118% of VREF (hysteresis window), and the INT pin returns high after fault removal - no latch or manual reset required.
What thermal performance can be expected on a standard PCB?
On the MPS EV2984-R-00B 6-layer evaluation board, θJA is 28°C/W. At 5A output and 12V input, case temperature rise is ≤20°C above ambient - confirming suitability for enclosed USB PD adapters without active cooling.
MP2984GR-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- -
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Number of Outputs:
- -
- Output Phases:
- -
- Voltage - Supply (Vcc/Vdd):
- -
- Frequency - Switching:
- -
- Duty Cycle (Max):
- -
- Synchronous Rectifier:
- -
- Clock Sync:
- -
- Serial Interfaces:
- -
- Control Features:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (4x4)
MP2984GR-Z FAQ
1.How can I place an order for MP2984GR-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2984GR-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 MP2984GR-Z reliable?
The price and inventory of MP2984GR-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2984GR-Z is usually 5 days.
3.What payment methods are accepted for MP2984GR-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2984GR-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2984GR-Z?
MP2984GR-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2984GR-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 MP2984GR-Z?
For technical support, including MP2984GR-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2984GR-Z requirements.
6.How does Aetrix verify that MP2984GR-Z is sourced from the original manufacturer or authorized distributors?
All MP2984GR-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 MP2984GR-Z meets industry standards.
7.What is the process for return or replacement of MP2984GR-Z?
All MP2984GR-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2984GR-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 MP2984GR-Z part is unused and in its original packaging.
Return procedure for MP2984GR-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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