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Monolithic Power Systems Inc. MP4255GVE-0002-P
- Part No.:
- MP4255GVE-0002-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 21-PowerVFQFN
- Datasheet:
-
MP4255GVE-0002-P.pdf
- Description:
- 36V, 3A, DUAL-CHANNEL BUCK CONVE
- Quantity:
- Payment:
- Shipping:
Inventory:2,499
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Product details
Overview
MP4255GVE-0002-P from Monolithic Power Systems is a dual-channel, monolithic synchronous buck converter IC designed for USB Power Delivery (PD) 3.1 applications with dual-port charging. It delivers up to 3A per channel across 4V–36V input, supports digital I²C interface and OTP programming, integrates 22mΩ/26mΩ internal MOSFETs, and operates in PWM/PFM modes with selectable switching frequencies (250kHz–2.1MHz).
For engineers reviewing the MP4255GVE-0002-P datasheet, MP4255GVE-0002-P pinout, MP4255GVE-0002-P application, or MP4255GVE-0002-P equivalent, key selection considerations include its dual 3A output capability with shared 6A mode, programmable current limit (50mA steps), VBUS isolation gate drivers, load-shedding alert, and wettable-flank QFN-21 package for automated optical inspection.
Technical Context
The MP4255 implements two independent peak-current-mode controlled buck regulators with fixed-frequency oscillators and phase-shifted operation to reduce input ripple. Each channel features an error amplifier with internal compensation, line-drop compensation, and low-dropout (LDO) mode for high-duty-cycle operation.
Digital control is implemented via a high-speed I²C interface (400kHz) supporting real-time configuration of VOUT (1V–21V), IOUT_LIMIT (0.5A–6A), fSW, FSS, phase delay, and line-drop compensation. OTP memory stores factory- or user-programmed settings, including default configuration MP4255GVE-0000.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 36V - supports automotive battery, industrial DC rails, and USB PD source inputs without external pre-regulation. |
| Output Current | 3A per channel or shared 6A - enables dual-port USB-C PD charging with independent or combined load handling. |
| Switching Frequency | 250kHz / 420kHz / 1.1MHz / 2.1MHz - selectable via I²C to optimize efficiency vs. size trade-offs for different inductor/capacitor choices. |
| Feedback Reference | 0.1V to 1.63V in 0.8mV steps - enables precise VOUT programming from 1V to 21V using internal DAC and digital interface. |
| Current Limit Resolution | 50mA/step via digital interface - allows fine-grained overcurrent protection tuning for diverse load profiles. |
| Internal MOSFET RDS(ON) | 22mΩ (HS) / 26mΩ (LS) - reduces conduction loss and thermal stress, enabling high-efficiency operation at full 3A load. |
| Protection Features | OCP, OVP (114–125% VOUT), thermal shutdown (170°C), and load-shedding alert - ensures robust operation in unattended USB charger systems. |
Pinout & Package
MP4255GVE-0002-P is housed in a wettable-flank QFN-21 package (4mm × 5mm), optimized for automated optical inspection (AOI) and thermal performance. The exposed thermal pad must be soldered to PCB ground plane for effective heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN1 | Channel 1 input supply | Main power input for buck 1; also supplies internal circuitry; must be tied to VIN2. |
| 2 PGND | Power ground reference | High-current return path for buck 1; requires low-inductance layout with multiple vias to AGND. |
| 3 VIN2 | Channel 2 input supply | Main power input for buck 2; must be tied to VIN1 for common input rail. |
| 4 FB2 | Buck 2 feedback input | Connects to resistor divider on VOUT2 to set regulated output voltage via internal 0.1V reference. |
| 5 GATE2 | VBUS isolation N-MOSFET driver | Drives external N-channel MOSFET for USB PD port isolation; supports fast turn-on/turn-off timing. |
| 6 SDA | I²C data line | Open-drain bidirectional interface for register read/write; requires external pull-up to 1.8V–5V. |
| 7 SCL | I²C clock input | Master-generated clock (up to 400kHz); synchronizes all digital configuration and status reads. |
| 8 ALT | Load-shedding alert output | Open-drain active-low signal indicating overcurrent or fault condition requiring system-level response. |
| 9 ISENS | Secondary current-sense input | Monitors external current-sense resistor for precise, adjustable overcurrent detection independent of FB loop. |
| 10 GATEG | External MOSFET gate driver | Drives gate of external N-MOSFET for auxiliary power path control (e.g., VBUS switching). |
| 11 BST2 | Buck 2 bootstrap supply | Connects to SW2 via 0.1–0.22µF capacitor to generate floating gate drive voltage for high-side MOSFET. |
| 12 SW2 | Buck 2 switch node | High-frequency switching output connected to inductor; requires wide copper trace and low-inductance layout. |
| 13 SW1 | Buck 1 switch node | High-frequency switching output connected to inductor; layout identical to SW2 for symmetry and EMI control. |
| 14 BST1 | Buck 1 bootstrap supply | Connects to SW1 via 0.1–0.22µF capacitor to generate floating gate drive voltage for buck 1 HS-FET. |
| 15 VCC | Internal 5V LDO output | Supplies internal logic; requires 1µF ceramic decoupling; powered by VIN or BIAS pin depending on configuration. |
| 16 AGND | Analog ground reference | Reference for FB, VREF, and error amplifier; must be tied to PGND with short, low-impedance connection. |
| 17 BIAS | LDO bias input | Enables secondary LDO for improved efficiency when tied to ≥4.8V output (e.g., VOUT1 or VOUT2). |
| 18 DRV | Programmable LDO output | 5.95V ±0.25V output with 1mA capability; digitally configurable for auxiliary bias or sensing circuits. |
| 19 EN | Enable control input | Active-high logic input with 1.6V rising threshold; includes internal 2MΩ pull-down and 10V clamp diode. |
| 20 GATE1 | VBUS isolation N-MOSFET driver | Drives external N-channel MOSFET for first USB PD port; functionally identical to GATE2. |
| 21 FB1 | Buck 1 feedback input | Connects to resistor divider on VOUT1 to set regulated output voltage; shares same reference as FB2. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 3A or shared 6A buck topology | Enables flexible dual-port USB PD designs with independent or aggregated current delivery without external controllers. |
| USB PD 3.1 compliance support | Integrates required gate drivers (GATE1/GATE2), alert signaling (ALT), and digital interface for seamless coordination with PD controllers. |
| Frequency spread spectrum (FSS) | Reduces peak EMI emissions by dithering switching frequency ±12%, easing EMC certification for compact chargers. |
| Line drop compensation | Actively adjusts output voltage based on input rail sag, maintaining stable VOUT under dynamic load and cable resistance. |
| Wettable flank QFN-21 package | Enables reliable AOI inspection of solder joints, critical for high-volume USB charger manufacturing and quality assurance. |
| One-time programmable (OTP) memory | Stores factory-configured parameters (e.g., MP4255GVE-0002-P) for boot-time initialization without host MCU intervention. |
Applications
| USB Power Delivery Charging Station | Industrial Dual-Rail DC/DC Supply |
|---|---|
|
Use Scenario: A wall-mounted 65W dual-port USB-C charger delivering 5V/3A and 9V/3A simultaneously to laptop and smartphone. IC Role / Device Role / Timing Role: MP4255GVE-0002-P serves as the primary dual-buck regulator, managing independent VOUT and IOUT_LIMIT per port via I²C commands from PD controller. Use Value: Eliminates need for discrete controllers and external MOSFETs, reducing BOM count by >7 components while supporting PD 3.1 variable voltage negotiation. |
Use Scenario: Programmable 24V-to-5V/9V dual-output supply for industrial PLC I/O modules requiring isolated, independently regulated rails. IC Role / Device Role / Timing Role: Acts as main DC/DC stage with digital reconfiguration of output voltages during field firmware updates. Use Value: Enables single-hardware design across multiple product variants via OTP-stored configurations, cutting inventory SKUs by 60%. |
| Automotive USB-C Dashboard Charger | Medical Portable Device Power Management |
|
Use Scenario: In-vehicle dual-port charger operating from 9V–16V battery with load dump tolerance up to 36V. IC Role / Device Role / Timing Role: Provides robust, thermally managed 3A outputs with thermal shutdown and OVP, coordinated via I²C with vehicle CAN bus controller. Use Value: Meets AEC-Q200 stress requirements via wettable-flank package and 125°C junction rating, eliminating derating penalties. |
Use Scenario: Battery-powered ultrasound probe requiring low-noise, tightly regulated 3.3V and 5V rails with fast transient response. IC Role / Device Role / Timing Role: Delivers precision outputs with <±0.5% load regulation and <10mV p-p ripple, digitally tuned during calibration. Use Value: Replaces discrete LDO + buck combos, reducing solution size by 45% while meeting IEC 60601-1 leakage current limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4255GVE-A | AEC-Q100 qualified version with extended temperature range (−40°C to +125°C) and enhanced ESD (HBM 3kV); identical pinout and OTP structure. | Required for automotive infotainment and ADAS systems where qualification is mandatory; not suitable for cost-sensitive consumer chargers. | Select MPQ4255GVE-A only when automotive qualification is contractually required; otherwise, MP4255GVE-0002-P offers identical functionality at lower cost. |
| RTQ2132BGQW | Single 6A buck with I²C interface; no dual independent channels, no GATE1/GATE2 drivers, no ALT pin; uses WQFN-20 package. | Suitable for shared-rail applications only; cannot support independent USB PD port control or VBUS isolation without external logic. | Choose RTQ2132BGQW only if dual independent outputs are unnecessary and board space is constrained; MP4255GVE-0002-P provides superior flexibility for multi-port systems. |
Compared with MPQ4255GVE-A, MP4255GVE-0002-P trades automotive qualification for lower unit cost and faster lead time, while retaining identical digital interface, OTP, and thermal performance. Against RTQ2132BGQW, it adds true dual-channel autonomy, integrated VBUS drivers, and fault alert signaling-critical for USB PD 3.1 compliance.
Availability
MP4255GVE-0002-P is available at Aetrix Electronics and suitable for USB Power Delivery charging stations, industrial dual-rail DC/DC supplies, and automotive dashboard chargers requiring stable component supply, consistent OTP configuration, and wettable-flank package reliability.
Supply support for MP4255GVE-0002-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 power management ICs, with over 20 years of expertise in DC/DC conversion, motor drivers, and battery management solutions.
The MP4255 belongs to MPS's USB PD–optimized buck converter product line, engineered specifically for compact, digitally configurable, dual-port power delivery systems requiring minimal external components and robust fault protection.
FAQ
What configuration is stored in MP4255GVE-0002-P's OTP memory?
MP4255GVE-0002-P contains a factory-programmed OTP configuration that sets default VOUT1 = 5V, VOUT2 = 9V, fSW = 420kHz, IOUT_LIMIT = 3.6A per channel, and enables frequency spread spectrum. This configuration is immutable after shipment and eliminates need for host initialization.
Can MP4255GVE-0002-P operate with only one channel enabled?
Yes. Channel enablement is controlled independently via I²C registers. Either buck converter can be disabled while the other remains active, allowing asymmetric operation such as 5V/3A + 20V/1.5A, with full digital control of each output's voltage, current limit, and switching frequency.
Does the I²C interface support hot-plug reconfiguration of VOUT during operation?
Yes. The MP4255 supports real-time VOUT adjustment via I²C without interrupting regulation. Transitions (e.g., 5V → 20V) complete in <5ms with monotonic slew rate control, verified in typical application waveforms on page 14 of the datasheet.
How does the BIAS pin improve efficiency in USB PD applications?
When BIAS is connected to VOUT1 (e.g., 9V), the internal LDO2 powers the control circuitry instead of LDO1, reducing quiescent current by ~40% and improving full-load efficiency by up to 1.2% - particularly beneficial in 27W+ dual-port chargers where thermal headroom is limited.
Is the wettable flank feature supported in standard reflow profiles?
Yes. The QFN-21 wettable flank package is compatible with standard lead-free reflow profiles (J-STD-020D). The flank geometry ensures visible solder fillets post-reflow, enabling 100% AOI verification of solder joint integrity without x-ray inspection.
What protection mechanisms activate during output short-circuit?
On short-circuit, the MP4255 triggers cycle-by-cycle overcurrent protection (OCP) within 100ns, disables both GATE1 and GATE2, asserts ALT low, and enters hiccup mode with 200ms off-time. Recovery is automatic once fault clears, with no latch-up or manual reset required.
Can the DRV pin power external circuitry like an ADC reference?
Yes. DRV provides a stable 5.95V ±0.25V output with 1mA drive capability and low noise (<100µV RMS). It is explicitly intended for biasing precision analog circuits such as ADC references or op-amp supplies, decoupled with a 0.1µF ceramic capacitor.
MP4255GVE-0002-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 21-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Topology:
- Step-Down (Buck) Synchronous (2), Linear (LDO) (1)
- Number of Outputs:
- 3
- Frequency - Switching:
- 250kHz, 420kHz, 1.1MHz, 2.1MHz
- Voltage/Current - Output 1:
- 1V ~ 36V, 3A
- Voltage/Current - Output 2:
- 1V ~ 36V, 3A
- Voltage/Current - Output 3:
- Adjustable, Adjustable, Fixed, 6V, 1mA
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 4V ~ 36V
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 21-QFN (4x5)
MP4255GVE-0002-P FAQ
1.How can I place an order for MP4255GVE-0002-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4255GVE-0002-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 MP4255GVE-0002-P reliable?
The price and inventory of MP4255GVE-0002-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4255GVE-0002-P is usually 5 days.
3.What payment methods are accepted for MP4255GVE-0002-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4255GVE-0002-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4255GVE-0002-P?
MP4255GVE-0002-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4255GVE-0002-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 MP4255GVE-0002-P?
For technical support, including MP4255GVE-0002-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4255GVE-0002-P requirements.
6.How does Aetrix verify that MP4255GVE-0002-P is sourced from the original manufacturer or authorized distributors?
All MP4255GVE-0002-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 MP4255GVE-0002-P meets industry standards.
7.What is the process for return or replacement of MP4255GVE-0002-P?
All MP4255GVE-0002-P units undergo pre-shipment inspection (PSI). If there is an issue with MP4255GVE-0002-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 MP4255GVE-0002-P part is unused and in its original packaging.
Return procedure for MP4255GVE-0002-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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