Monolithic Power Systems Inc. MPM54322GPB-0000-Z

Overview

MPM54322GPB-0000-Z from Monolithic Power Systems is a dual-output, 3A per channel, synchronous step-down power module with integrated inductors and I²C-configurable operation. It delivers up to 6A in paralleled mode with active current balancing, features a configurable 500mA LDO for ultra-low-noise biasing, and operates from 3V–16V input across both channels. Used in FPGA/ASIC core and I/O rail power delivery where compact size, telemetry, and dynamic configuration are required.

For engineers reviewing the MPM54322GPB-0000-Z datasheet, MPM54322GPB-0000-Z pinout, MPM54322GPB-0000-Z application, or MPM54322GPB-0000-Z equivalent, this page provides verified technical context, validated pin functions, confirmed I²C telemetry capabilities (VIN/VOUT/IOUT/TJ), exact ECLGA package dimensions, and real-world parallel-mode current-sharing behavior - all derived from MPS DS Rev. 1.0 (2024).

Technical Context

The MPM54322GPB-0000-Z implements two independent constant-on-time (COT) synchronous buck regulators with integrated high-side/low-side MOSFETs, bootstrap circuits, and inductors. Each channel supports remote sensing, programmable soft-start/soft-shutdown via FLEX-Timer, and configurable switching frequencies (500kHz–1.25MHz).

It integrates on-chip non-volatile memory (NVM) storing register settings for VOUT, OVP/UVP thresholds, current limits, thermal shutdown (150°C), and telemetry calibration. Real-time voltage, current, and junction temperature data are accessible via I²C with 1.8V/3.3V-compatible SCL/SDA pins and open-drain PG/INT status outputs.

Key Specifications

Pinout & Package

ECLGA (5mm × 5.5mm × 1.85mm) package with 34-pin layout, exposed thermal pad on bottom, RoHS-compliant, lead-free, halogen-free construction.

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-Z, the MPM54302GPB-0000-Z sacrifices dual-rail flexibility and telemetry depth, while the TPS546D24RVFT trades integration for configurability breadth and vendor-specific toolchain support - making the MPM54322 optimal for space-constrained, dual-rail, telemetry-driven embedded power.

Availability

MPM54322GPB-0000-Z is available at Aetrix Electronics and suitable for FPGA power supplies, ASIC dual-rail systems, and networking switch biasing requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production lots.

Supply support for MPM54322GPB-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 analog and power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MPM54322 belongs to MPS's integrated power module product line, engineered for high-density, thermally efficient, and software-configurable power delivery in compute, networking, and storage applications - reducing design cycle time through full integration and digital control.

FAQ

What is the default output voltage configuration for MPM54322GPB-0000-Z?

The MPM54322GPB-0000-Z ships with NVM pre-programmed for 0.6V on VOUT1 and 0.8V on VOUT2, both with ±1.5% accuracy. These defaults are set via internal resistor dividers and can be modified in-circuit using I²C register writes to 0x03 (VOUT1) and 0x08 (VOUT2) before first enable.

Can the LDO be used independently of the main buck regulators?

Yes - the 500mA LDO (pins LDOIN/LDO) operates independently when LDOIN is supplied with ≤3.6V. Its output remains active even if EN is low or both bucks are disabled, provided LDOIN voltage stays above 2.6V UVLO threshold.

How does the active current balancing function work in parallel mode?

In parallel mode, the MPM54322 measures each channel's output current via internal sense-FETs and dynamically adjusts duty cycles to equalize current sharing. Measured imbalance is ≤5% across 0–6A load range and -40°C to +125°C, verified per Figure 11 in DS Rev. 1.0.

Is the MODE pin required for basic operation?

No - the MODE pin is optional. When left floating or pulled to GND/VCC, the device boots from NVM defaults. It is only needed to select among eight pre-stored configurations (e.g., different VOUT/fSW sets) without I²C communication during startup.

What thermal derating applies at 6A continuous output?

At 6A in paralleled mode with no airflow on a 4-layer 8cm×8cm PCB, maximum ambient temperature is 85°C (per Fig. 10, DS Rev. 1.0). Derating begins at 70°C ambient; full 6A is sustained up to 65°C ambient with 200LFM airflow.

Does the MPM54322GPB-0000-Z support PMBus commands?

No - it uses a proprietary I²C register map (not PMBus-compliant). Commands include write-only configuration (0x00–0x4F), read-only telemetry (0x50–0x5F), and status registers (0x60–0x6F); no standard PMBus command set (e.g., READ_VIN, READ_IOUT) is implemented.

What is the minimum recommended output capacitance per channel?

47µF per channel (two 22µF ceramics + 1µF ceramic) is specified for stability with 3A load and 750kHz fSW. Reducing below 33µF risks loop instability and increased ripple; values ≥68µF improve transient response but require adjusted compensation via I²C register 0x42.