Monolithic Power Systems Inc. MP4245GVE-0000-P

Overview

MP4245GVE-0000-P from Monolithic Power Systems is a 36V, 6A peak buck-boost DC/DC converter with integrated four-MOSFET topology, I²C/PMBus interface, and two-time programmable MTP memory. It delivers up to 60W output power across 4V–36V input and 1V–23V output ranges, supports 250/350/420kHz selectable switching frequency, and features accurate constant-current limiting for USB PD charging applications.

For engineers reviewing the MP4245GVE-0000-P datasheet, MP4245GVE-0000-P pinout, MP4245GVE-0000-P application, or MP4245GVE-0000-P equivalent, this device serves as a programmable, fault-protected power delivery controller for USB Type-C PD ports, 12V bus supplies, and wireless charging systems-requiring precise CC/CV regulation, thermal shutdown, OVP, and I²C-configurable loop parameters.

Technical Context

The MP4245 implements a synchronous four-switch buck-boost architecture with fixed-frequency PWM control and seamless mode transitions between buck, boost, and buck-boost regions. Its internal error amplifier compares FB voltage against programmable reference (0.092–1.600V), while the current-sense amplifier monitors ISENS+/ISENS− to enforce ±5% accurate constant-current limits from 1A to 20A via external sense resistor scaling.

Control logic integrates line-drop compensation, spread-spectrum dithering (±12%), soft-start (1.4ms), and PMBus-compatible I²C register access for real-time configuration of output voltage, current limit, frequency, and protection thresholds-including VOUT_OV_FAULT at 121% and VIN_UV_FAULT at 3.1V.

Key Specifications

Pinout & Package

MP4245GVE-0000-P is housed in a thermally enhanced QFN-21 (4mm × 5mm) package with wettable flanks for reliable solder-joint inspection. The exposed thermal pad must be connected to a dedicated PGND copper area using ≥9 thermal vias.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar buck-boost converter applications.

Compared with MP4235GQ-Z, MP4245GVE-0000-P offers identical pinout and register mapping but lacks updated thermal performance and MTP endurance; versus TPS63802DLAR, it provides wider voltage range, higher current, and full PMBus control-making it uniquely suited for USB PD infrastructure.

Availability

MP4245GVE-0000-P is available at Aetrix Electronics and suitable for USB PD charging ports, 12V industrial bus supplies, and wireless charging transmitters requiring stable component supply and long-term design continuity.

Supply support for MP4245GVE-0000-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 LED lighting controllers.

The MP4245 belongs to MPS's USB Power Delivery product line, engineered specifically for programmable, high-efficiency buck-boost regulation in portable and embedded USB-C ecosystems-prioritizing I²C configurability, robust fault handling, and seamless mode transitions.

FAQ

Is MP4245GVE-0000-P recommended for new designs?

No-Monolithic Power Systems explicitly states "NOT RECOMMENDED FOR NEW DESIGNS" in the datasheet and directs users to MP4235. MP4245 remains supported for existing designs and legacy replacements, with full technical documentation and lifetime buy programs available through authorized distributors.

What is the function of the ADD pin?

The ADD pin sets the I²C slave address by reading its voltage via an internal 20μA current source. Connecting resistors from ADD to GND selects one of eight addresses (61h–67h); floating ADD defaults to 60h. Address is latched at power-up and cannot be changed dynamically.

How does the MP4245 handle output over-voltage protection?

MP4245 triggers output over-voltage protection at 121% of programmed VOUT (e.g., 6.05V for 5V output) and enters latch-off state. Recovery occurs automatically when VOUT falls below 110% threshold. Protection is hardware-based, independent of I²C communication, ensuring fail-safe behavior.

Can the MP4245 operate without an external microcontroller?

Yes-the MTP memory stores default configuration (output voltage, current limit, frequency), allowing autonomous startup. The EN pin enables hardware-controlled on/off sequencing, and the ALT pin provides standalone fault signaling without host interaction.

What thermal derating applies above 25°C ambient?

With θ_JA = 44°C/W, maximum continuous power drops linearly: at 60°C ambient, PD_MAX = (125°C − 60°C) / 44°C/W = 1.48W. For 6A operation, ensure PCB thermal design meets EV4245-VE-00A reference layout (θ_JA = 24.6°C/W) or add forced airflow.

Does MP4245 support synchronous rectification in all operating modes?

Yes-all four internal MOSFETs are actively driven with adaptive dead-time control in buck, boost, and buck-boost modes. No external diodes or gate drivers are required, and conduction losses are minimized across the full 4V–36V input range.

What is the minimum output capacitor requirement for stability?

MPS specifies ≥100µF total output capacitance (e.g., 2×100µF + 1×4.7µF ceramic) with ≤5mΩ ESR. Ceramic-only designs require ≥220µF and careful attention to zero placement; instability manifests as subharmonic oscillation below 100kHz under light loads.