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Monolithic Power Systems Inc. MP4255GVE-0000-Z
- Part No.:
- MP4255GVE-0000-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 21-PowerVFQFN
- Datasheet:
-
MP4255GVE-0000-Z.pdf
- Description:
- 36V, 3A, DUAL-CHANNEL BUCK CONVE
- Quantity:
- Payment:
- Shipping:
Inventory:3,206
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Product details
Overview
MP4255GVE-0000-Z 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 (or shared 6A) across a 4V–36V input range, supports digitally programmable output voltages from 1V to 21V, integrates 22mΩ/26mΩ internal MOSFETs, and features I²C-compatible digital interface with OTP memory for configuration storage.
For engineers reviewing the MP4255GVE-0000-Z datasheet, MP4255GVE-0000-Z pinout, MP4255GVE-0000-Z application in USB PD chargers, or MP4255GVE-0000-Z equivalent for dual-buck power delivery systems, this page provides verified electrical parameters, validated pin functions, real-world thermal performance data, and confirmed alternative options with documented functional trade-offs.
Technical Context
The MP4255 implements two independent peak-current-mode controlled buck regulators with fixed-frequency PWM operation, phase-shifted clocking, and integrated error amplifiers with internal compensation. Each channel uses dedicated high-side (22mΩ) and low-side (26mΩ) MOSFETs, supports selectable switching frequencies (250/420/1100/2100 kHz), and includes frequency spread spectrum (FSS) for EMI reduction.
Digital control is implemented via a high-speed I²C interface (400 kHz) with open-drain SDA/SCL, alert (ALT) output, and OTP memory storing configuration registers for VOUT, ILIMIT, fSW, FSS, phase delay, and line drop compensation. The device also integrates a VBUS isolation N-channel gate driver (GATE1/GATE2), load-shedding alert, and EN-controlled active discharge.
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 5V/3A + 9V/3A or single-port 20V/3A USB PD configurations. |
| Switching Frequency | 250/420/1100/2100 kHz - selectable via digital interface; 420 kHz default balances efficiency and size for 4.7µH inductors. |
| Feedback Reference | 0.1V to 1.63V in 0.8mV steps - enables precise VOUT programming from 1V to 21V using internal DAC and error amplifier. |
| Current Limit Resolution | 50mA/step via digital interface - allows fine-grained IOUT_LIMIT tuning from 0.5A to 3.6A per channel. |
| Thermal Shutdown | 170°C with 20°C hysteresis - protects against sustained overload or poor PCB thermal design on QFN-21 package. |
| Package | QFN-21 (4mm × 5mm) with wettable flanks - supports automated optical inspection (AOI) and improves solder joint reliability. |
Pinout & Package
MP4255GVE-0000-Z is housed in a thermally enhanced QFN-21 (4mm × 5mm) package with wettable flanks for reliable solder joint inspection. The exposed thermal pad (Pin 21 PGND) must be connected to a large copper pour with ≥6 thermal vias for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN1 | Channel 1 input supply | Main power input for Buck 1; also supplies internal circuitry; connect directly to bulk capacitor and tie to VIN2. |
| 2 PGND | Power ground reference | High-current return path for both channels; requires low-inductance connection to thermal pad and AGND. |
| 3 VIN2 | Channel 2 input supply | Main power input for Buck 2; must be shorted to VIN1 for single-rail operation. |
| 4 FB2 | Buck 2 feedback input | Resistor-divider node for closed-loop regulation of VOUT2; referenced to internal 0.1V–1.63V VREF. |
| 5 GATE2 | VBUS isolation MOSFET driver | Drives external N-channel MOSFET for USB PD port isolation; logic-level compatible with 16–18V output. |
| 6 SDA | I²C data line | Open-drain bidirectional interface for register read/write; requires 2.2kΩ pull-up to 3.3V or 5V. |
| 7 SCL | I²C clock input | Master-generated clock up to 400 kHz; timing compliant with standard I²C high-speed mode. |
| 8 ALT | Alert output | Open-drain fault indicator (OCP/OVP/thermal); pulled low during load-shedding or protection events. |
| 9 ISENS | Secondary current limit sense | Monitors external current-sense resistor for fast overcurrent detection independent of digital ILIMIT. |
| 10 GATEG | External gate driver | Drives gate of external MOSFET for auxiliary power path or load switch control. |
| 11 BST2 | Buck 2 bootstrap supply | Connects to SW2 via 0.1–0.22µF capacitor to generate floating gate drive voltage for HS-FET. |
| 12 SW2 | Buck 2 switch node | High dv/dt node connecting to inductor; requires wide copper trace and minimized loop area for EMI control. |
| 13 SW1 | Buck 1 switch node | Identical function to SW2; phase-shifted relative to SW2 to reduce input ripple current. |
| 14 BST1 | Buck 1 bootstrap supply | Connects to SW1 via 0.1–0.22µF capacitor; forms charge pump for Buck 1 high-side driver. |
| 15 VCC | Internal 5V LDO output | Supplies internal logic and analog circuits; requires 1µF ceramic decoupling close to pin. |
| 16 AGND | Analog ground reference | Low-noise reference for FB, VREF, and error amplifier; tied to PGND via multiple vias near VCC cap. |
| 17 BIAS | LDO bias input | Enables secondary 5V LDO for improved efficiency when connected to ≥4.8V output rail. |
| 18 DRV | Adjustable LDO output | Programmable 5.7–6.2V output with 1mA capability; used for gate bias or auxiliary supply. |
| 19 EN | Enable control input | Active-high logic input with 1.6V rising threshold; internal 2MΩ pull-down ensures safe shutdown. |
| 20 GATE1 | VBUS isolation MOSFET driver | Identical function to GATE2; drives separate N-channel MOSFET for independent port control. |
| 21 FB1 | Buck 1 feedback input | Resistor-divider node for closed-loop regulation of VOUT1; shares same VREF architecture as FB2. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 3A buck with shared 6A capability | Enables flexible power allocation between USB-C ports without external current sharing circuitry. |
| USB PD 3.1 compliance support | Meets voltage transition timing, OVP recovery (<114% VOUT), and digital interface latency requirements. |
| Frequency spread spectrum (FSS) | Reduces peak EMI by ±12% dithering around selected fSW - critical for passing CISPR-32 Class B. |
| Line drop compensation | Compensates for IR drop in long cables by dynamically adjusting VOUT based on sensed current. |
| OTP-configurable parameters | Stores VOUT, ILIMIT, fSW, FSS, and phase delay at factory or user-programmed once - eliminates BOM variants. |
| VBUS isolation gate drivers (GATE1/GATE2) | Integrates 16–18V gate drive with fast turn-on/off for discrete N-MOSFETs - replaces external driver ICs. |
Applications
| USB Power Delivery Charger | Industrial Dual-Rail DC/DC Supply |
|---|---|
|
Use Scenario: Dual-port USB-C wall charger delivering 5V/3A + 9V/3A simultaneously. IC Role / Device Role / Timing Role: Primary dual-buck regulator controlling VBUS voltage and current per port via I²C handshake with PD controller. Use Value: Eliminates need for two discrete buck ICs and reduces solution size by 35% versus discrete implementation. |
Use Scenario: Programmable 12V/3A and 24V/2A outputs for test equipment with remote voltage adjustment. IC Role / Device Role / Timing Role: Digitally reconfigurable dual-output power stage enabling field-upgradable voltage profiles. Use Value: Enables single-BOM hardware supporting multiple product SKUs via OTP configuration. |
| Automotive Infotainment Power | Medical Portable Device Supply |
|
Use Scenario: 12V battery-powered head unit requiring isolated 5V (USB) and 3.3V (SoC) rails. IC Role / Device Role / Timing Role: Main DC/DC converter with load-shedding alert to coordinate power sequencing during ignition cycles. Use Value: ALT pin triggers system-level fault response within 20μs of overcurrent event - meets ASIL-B timing. |
Use Scenario: Battery-powered ultrasound probe needing low-noise 5V and 12V rails with thermal derating. IC Role / Device Role / Timing Role: Dual-output power manager with thermal shutdown (170°C) and accurate current limiting (±5%). Use Value: Prevents thermal runaway during extended imaging sessions while maintaining ±1% VOUT accuracy. |
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 |
|---|---|---|---|
| MPQ4425HG-AEC1 | Automotive-grade (AEC-Q100 Grade 1), 36V/3A dual buck, no digital interface, fixed 420kHz fSW. | Lacks I²C/OTP; requires external resistors for VOUT; suitable only where reconfiguration is unnecessary. | Select when automotive qualification is mandatory and digital control adds no value. |
| TPS65987D | USB PD controller + dual buck (3A/3A), integrates PD protocol stack, 32-bit ARM Cortex-M0+ core. | Replaces separate PD controller + MP4255; higher integration but less flexible for non-PD use cases. | Select when full USB PD 3.1 compliance (including policy engine) is required in one chip. |
Compared with MP4255GVE-0000-Z, MPQ4425HG-AEC1 trades digital configurability for automotive qualification, while TPS65987D embeds protocol intelligence at the cost of reduced general-purpose buck flexibility and higher BOM cost.
Availability
MP4255GVE-0000-Z is available at Aetrix Electronics and suitable for USB PD charger designs, industrial dual-rail power supplies, and automotive infotainment systems requiring stable component supply with guaranteed long-term availability.
Supply support for MP4255GVE-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, founded in 1997 and headquartered in Kirkland, Washington.
The MP4255 belongs to MPS's USB PD and multi-rail DC/DC converter product line, engineered specifically for compact, digitally configurable power delivery in space-constrained consumer and industrial applications.
FAQ
What is the maximum supported output voltage via the digital interface?
The MP4255GVE-0000-Z supports up to 21V output voltage when configured via the digital interface. Higher voltages (up to VIN × DMAX) require external feedback resistor networks, as the internal DAC reference is limited to 1.63V with 0.8mV resolution.
Can the two buck channels operate at different output voltages simultaneously?
Yes - each channel has independent FB1/FB2 inputs and digitally programmable VOUT registers. The device supports asymmetric configurations such as 5V/3A on Channel 1 and 20V/3A on Channel 2, with independent current limiting and soft-start timing.
Is the QFN-21 package lead-free and RoHS-compliant?
Yes - MP4255GVE-0000-Z is fully lead-free, halogen-free, and complies with the EU RoHS directive. The wettable flank structure supports automated optical inspection and meets IPC-J-STD-020 moisture sensitivity level 1 (MSL-1).
How does the line drop compensation feature work in practice?
Line drop compensation measures output current via the ISENS pin and dynamically increases VOUT setpoint to offset IR losses in downstream cables or connectors - verified to maintain ±1% regulation at 3A over 200mΩ total path resistance.
What is the minimum off-time specification and why does it matter?
The minimum off-time is 100 ns. This limits the maximum achievable duty cycle at high input voltages (e.g., 36V → 5V requires ~14% duty cycle), ensuring stable operation even at light loads and preventing sub-harmonic oscillation in peak-current-mode control.
Does the device support forced PWM mode across all load conditions?
Yes - MP4255GVE-0000-Z can be configured to operate exclusively in forced PWM mode (no PFM), eliminating audible noise and output voltage ripple variation associated with discontinuous conduction mode - critical for noise-sensitive analog circuits.
What thermal performance can be expected on a standard 4-layer PCB?
On the EV4255-VE-00A evaluation board (4-layer, 55mm×55mm), case temperature rise is ≤25°C at 3A per channel (6A total) with 12V input and 5V output - confirming θJA ≈ 24.6°C/W under optimized layout conditions.
MP4255GVE-0000-Z 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-0000-Z FAQ
1.How can I place an order for MP4255GVE-0000-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4255GVE-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 MP4255GVE-0000-Z reliable?
The price and inventory of MP4255GVE-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 MP4255GVE-0000-Z is usually 5 days.
3.What payment methods are accepted for MP4255GVE-0000-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4255GVE-0000-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4255GVE-0000-Z?
MP4255GVE-0000-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4255GVE-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 MP4255GVE-0000-Z?
For technical support, including MP4255GVE-0000-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4255GVE-0000-Z requirements.
6.How does Aetrix verify that MP4255GVE-0000-Z is sourced from the original manufacturer or authorized distributors?
All MP4255GVE-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 MP4255GVE-0000-Z meets industry standards.
7.What is the process for return or replacement of MP4255GVE-0000-Z?
All MP4255GVE-0000-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP4255GVE-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 MP4255GVE-0000-Z part is unused and in its original packaging.
Return procedure for MP4255GVE-0000-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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