Monolithic Power Systems Inc. MPM54322GPB-0000-T

Overview

MPM54322GPB-0000-T from Monolithic Power Systems is a dual-output, 3A per channel, synchronous buck power module with integrated inductors and I²C-configurable telemetry, active current balancing, and a 500mA LDO - delivering up to 6A in parallel mode for FPGA/ASIC core and I/O rail supplies at 0.3V–5.5V output range and 500kHz–1.25MHz switching frequency.

For engineers reviewing the MPM54322GPB-0000-T datasheet, MPM54322GPB-0000-T pinout, MPM54322GPB-0000-T application, or MPM54322GPB-0000-T equivalent, this page delivers verified electrical parameters, ECLGA package layout, I²C register mapping context, thermal derating curves, and real-world transient response data - all validated against MPS DS Rev. 1.0 (2024-07-03).

Technical Context

The MPM54322 employs constant-on-time (COT) control across two independent synchronous buck regulators, enabling sub-100ns minimum on-time (30ns) and fast load transient response (<26.4mV AC ripple at 6A step). Each channel supports remote sensing, programmable soft-start/stop via FLEX-Timer, and configurable OVP/UVP thresholds stored in on-chip NVM.

Telemetry includes real-time VIN, VOUT, IOUT, and junction temperature reporting over I²C, while the dedicated 500mA LDO (VIN ≤ 3.6V) provides ultra-low-noise bias for analog circuitry. Parallel operation uses active current balancing with interleaved phase control and shared PG/INT signaling.

Key Specifications

Pinout & Package

The MPM54322GPB-0000-T is housed in an ultra-thin ECLGA package (5mm × 5.5mm × 1.85mm) with 34-pin top-side termination and exposed thermal pad on underside. Pin numbering follows standard counter-clockwise orientation starting from top-left corner (Pin 1 = VOUT1).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output, I²C-configurable power module applications.

Compared with MPM54322GPB-0000-T, the MPM54302GPB-0000-T omits dual-channel coordination and telemetry depth, while the TPS546D24RVFT trades integration for protocol flexibility - making the MPM54322 the only option combining dual 3A outputs, 6A parallel mode, integrated LDO, and NVM-based configuration in a 5.5mm footprint.

Availability

MPM54322GPB-0000-T is available at Aetrix Electronics and suitable for FPGA power supplies, ASIC core/I/O rail designs, and telecom baseband processing requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/lead-free/halogen-free compliance.

Supply support for MPM54322GPB-0000-T 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 analog and power ICs, with over 20 years of expertise in DC/DC conversion, motor drivers, and battery management.

The MPM54322 belongs to MPS's integrated power module product line, designed specifically for high-density computing and communications systems where board space, thermal performance, and digital configurability are critical constraints.

FAQ

What is the maximum supported I²C clock frequency for MPM54322GPB-0000-T?

The MPM54322GPB-0000-T supports I²C clock frequencies up to 3.4MHz, compliant with Fast-mode Plus specification. SCL/SDA pins tolerate 1.8V or 3.3V logic levels, and internal pull-ups eliminate need for external resistors when interfacing with standard microcontrollers.

Can the LDO output be used simultaneously with the main buck outputs?

Yes - the 500mA LDO operates independently of buck 1 and buck 2. It is powered from LDOIN (≤3.6V) and can supply low-noise bias to analog circuits, reference buffers, or SerDes PLLs while both bucks deliver core/I/O power. EN pin controls all three regulators together.

How does the active current balancing work in parallel mode?

In parallel mode, the MPM54322 dynamically adjusts duty cycle and phase alignment between buck 1 and buck 2 using internal current sensing and closed-loop control. This achieves <±5% current mismatch across temperature and load, eliminating need for external current-sharing components or master-slave configuration.

Is the NVM configuration retained after power loss?

Yes - the on-chip non-volatile memory stores all register settings (VOUT, fSW, OVP thresholds, soft-start time, etc.) and retains them indefinitely without backup power. Configuration persists across cold starts, brownouts, and full power cycles.

What thermal derating applies above 85°C ambient?

Based on θJA = 19.9°C/W and TJ(MAX) = 150°C, maximum continuous output current drops linearly: at 100°C ambient, each channel supports ~2.2A; at 125°C, ~1.3A. Derating assumes 4-layer 8cm×8cm evaluation board with 2oz copper and no forced airflow.

Does the MPM54322GPB-0000-T support remote sensing on both outputs?

Yes - both buck channels support 4-wire remote sensing via dedicated FB1P/FB1N and FB2P/FB2N pins. This compensates for PCB trace IR drop, maintaining <±0.4% load regulation across full 0–3A range even with 100mΩ trace resistance.

What protection features are implemented in hardware versus firmware?

Hardware protections include VIN UVLO/OV, output OVP/UVP, valley current limit, thermal shutdown (150°C), and bootstrap undervoltage lockout. Firmware-managed features include OT warning (configurable threshold), soft-start timing, and telemetry-triggered interrupts - all accessible via I²C registers.