Monolithic Power Systems Inc. MPQ4341GLE-5-AEC1-P

Overview

MPQ4341GLE-5-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified synchronous step-down DC/DC converter delivering up to 5A continuous output current at fixed 5V, with 3.3V–36V input range, 1μA shutdown current, and multi-phase capability for automotive power rails. It integrates 60mΩ HS-FET and 35mΩ LS-FET, supports cold-crank (3.1V) and 42V load dump, and operates from –40°C to +150°C junction temperature.

For engineers reviewing the MPQ4341GLE-5-AEC1-P datasheet, MPQ4341GLE-5-AEC1-P pinout, MPQ4341GLE-5-AEC1-P application, or MPQ4341GLE-5-AEC1-P equivalent, key selection criteria include ultra-low quiescent current (3µA sleep mode), zero-delay PWM control for transient response, configurable 350kHz–2.5MHz switching frequency, CISPR25 Class 5 EMI compliance, and wettable-flank QFN-17 package for automated optical inspection.

Technical Context

This buck regulator employs fixed-frequency zero-delay PWM (ZDP) control with adaptive asynchronous modulation (AAM) to maintain high efficiency across light-to-heavy loads. Its internal gate drivers support bootstrap high-side drive and low-dropout (LDO) mode during automotive cold-crank conditions.

The device implements multi-phase synchronization via SYNCO/ICS pins, enabling parallel operation with phase interleaving. Protection features include hiccup-mode over-current protection, thermal shutdown at 150°C, and precise power-good monitoring with ±6% window (94–106% VOUT).

Key Specifications

Pinout & Package

MPQ4341GLE-5-AEC1-P is housed in a wettable-flank QFN-17 (3mm × 4mm) package with exposed thermal pad, optimized for solder joint inspection and thermal dissipation in automotive PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ4341JGLE-5-AEC1-P, the QFN-19 variant offers identical regulation performance with slightly better thermal resistance and dedicated sync pin routing, while TPS54560QDGQRQ1 trades automotive robustness for broader input range and lacks integrated EMI mitigation features.

Availability

MPQ4341GLE-5-AEC1-P is available at Aetrix Electronics and suitable for automotive clusters, ADAS camera modules, infotainment systems, and telematics units requiring stable component supply with AEC-Q100 traceability and long-term production support.

Supply support for MPQ4341GLE-5-AEC1-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MPQ4341 product line targets automotive power conversion with AEC-Q100 qualification, emphasizing ultra-low IQ, multi-phase scalability, and EMI-hardened integration for safety-critical 12V/48V subsystems.

FAQ

What is the minimum input voltage supported during cold-crank operation?

The MPQ4341GLE-5-AEC1-P supports operation down to 3.1V input during cold-crank events, enabled by its low-dropout (LDO) mode that maintains regulated 5V output even when VIN falls below VOUT. This is validated across the full –40°C to +150°C junction temperature range and meets ISO 16750-2 pulse 4 requirements.

Does this part require an external feedback resistor network for 5V output?

No. The MPQ4341GLE-5-AEC1-P is a fixed-output variant with internal feedback divider set for 5.0V ±1.2%. The VOUT pin connects directly to the output capacitor, eliminating external resistors and associated tolerance drift or layout sensitivity.

How is multi-phase operation implemented with this device?

Multi-phase operation uses the ICS (current share) and SYNCO (sync output) pins: ICS pins of multiple devices are paralleled to equalize phase currents, while SYNCO from one master device drives SYNCIN/MODE of slaves to enforce precise phase alignment. No external controller is required.

What package-related benefits does the wettable flank feature provide?

The wettable flank QFN-17 package enables automated optical inspection (AOI) of side-wall solder joints during SMT assembly, significantly improving defect detection for automotive-grade manufacturing. It also enhances thermal conduction through the exposed pad and improves mechanical reliability under thermal cycling stress.

Can the switching frequency be synchronized to an external clock source?

Yes. Applying an external clock signal to the SYNCIN/MODE pin synchronizes the internal oscillator to that source within ±15% frequency tolerance. This enables deterministic EMI reduction in systems with multiple switching regulators and eliminates beat frequencies.

Is the power-good (PG) output compatible with 3.3V logic systems?

Yes. The PG pin is an open-drain output with 0.3V max low-level voltage at 1mA sink current. When pulled up to 3.3V, it delivers clean logic-high and logic-low signals compatible with standard 3.3V microcontrollers and PMIC sequencers.

What is the recommended PCB layout practice for thermal management?

Use a minimum 4-layer board with dedicated 2oz copper thermal plane connected to the exposed pad via ≥8 thermal vias (0.3mm diameter, 0.6mm pitch). Route VIN, SW, and PGND traces wide and short; separate AGND and PGND with single-point connection near VCC capacitor to minimize noise coupling.