Monolithic Power Systems Inc. MPQ4340GLE-5-AEC1-P

Overview

MPQ4340GLE-5-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified synchronous step-down DC/DC converter delivering up to 4A continuous output current at fixed 5V, with 3.3V–36V input range, 1μA shutdown current, and configurable 350kHz–2.5MHz switching frequency. It integrates 60mΩ high-side and 35mΩ low-side MOSFETs and supports automotive cold-crank (down to 3.1V) and 42V load dump protection.

For engineers reviewing the MPQ4340GLE-5-AEC1-P datasheet, MPQ4340GLE-5-AEC1-P pinout, MPQ4340GLE-5-AEC1-P application, or MPQ4340GLE-5-AEC1-P equivalent, key selection considerations include its ultra-low quiescent current in sleep mode (3µA), zero-delay PWM control for fast transient response, multi-phase capability via ICS pin, and wettable-flank QFN-17 package for automated optical inspection in automotive PCB assembly.

Technical Context

This buck regulator employs zero-delay PWM (ZDP) control architecture to minimize output voltage deviation during load transients, with internal gate drivers optimized for low R_DS(ON) FETs. Its advanced asynchronous modulation (AAM) dynamically reduces switching frequency under light loads to maintain >85% efficiency down to 100µA output current.

The device implements dual-mode operation: forced continuous conduction mode (FCCM) for low-noise applications and AAM for ultra-low IQ performance. It features integrated thermal shutdown (150°C trip), hiccup over-current protection, and programmable soft-start via external capacitor on SS pin - all validated across –40°C to +150°C junction temperature range.

Key Specifications

Pinout & Package

MPQ4340GLE-5-AEC1-P is housed in a wettable-flank QFN-17 (3mm × 4mm) package, enabling solder joint inspection and improved thermal dissipation via exposed thermal pad. Pin numbering follows standard top-view orientation with pin 1 marked by dot or chamfered corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ4340JGLE-5-AEC1-P, the subject part offers identical performance in a smaller QFN-17 footprint, reducing PCB area and cost; versus TPS54560QDGQRQ1, it delivers 6× lower quiescent current and integrated multi-phase support without external loop compensation.

Availability

MPQ4340GLE-5-AEC1-P is available at Aetrix Electronics and suitable for automotive instrument clusters, ADAS camera modules, infotainment head units, and industrial vehicle telematics requiring stable component supply with AEC-Q100 compliance and long-term production support.

Supply support for MPQ4340GLE-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 core expertise in DC/DC conversion, motor drivers, and LED lighting controllers.

The MPQ4340 series belongs to MPS's automotive-qualified power portfolio, designed specifically for demanding vehicular applications requiring high reliability, wide input range, and ultra-low standby power consumption.

FAQ

What is the minimum input voltage required for MPQ4340GLE-5-AEC1-P to regulate 5V output?

The device maintains regulation down to 3.3V input under normal conditions, and enters low-dropout (LDO) mode below that-supporting cold-crank operation as low as 3.1V input while sustaining 5V output at reduced current. UVLO rising threshold is 3.0V nominal, ensuring reliable startup after battery recovery.

Does MPQ4340GLE-5-AEC1-P require external feedback resistors for the 5V output?

No. This part is a fixed-output variant with internal feedback network trimmed to 5.0V ±2%. No external resistors are needed-simplifying layout, reducing BOM count, and eliminating resistor tolerance errors affecting output accuracy.

How is multi-phase operation implemented with MPQ4340GLE-5-AEC1-P?

Multi-phase operation is enabled by connecting the ICS pins of multiple MPQ4340 devices together and tying SYNCO of masters to SYNCIN/MODE of slaves. The ICS network forces current balancing across phases, achieving <±5% mismatch at full load without external current-sense amplifiers.

What package-related benefits does the wettable-flank QFN-17 offer for automotive manufacturing?

The wettable flanks allow automated optical inspection (AOI) of solder fillets on all peripheral leads, significantly improving defect detection rate for reflow-soldered joints. This meets stringent automotive process validation requirements (e.g., IATF 16949) and reduces field failure risk from insufficient solder wetting.

Can MPQ4340GLE-5-AEC1-P operate with an external clock source?

Yes. Applying a clean square-wave clock signal (90–115% of free-running frequency) to the SYNCIN/MODE pin synchronizes internal switching to the external source. This eliminates beat frequencies in multi-rail systems and simplifies EMI filter design by fixing fSW.

What is the recommended input capacitance for MPQ4340GLE-5-AEC1-P at 4A load?

A minimum of 22µF X7R ceramic capacitor placed within 3mm of VIN and PGND pins is recommended. For optimal ripple suppression and transient response, use parallel combination: one 10µF (0805) + two 4.7µF (0603) devices with low ESL construction, rated ≥50V.

Is thermal derating required for continuous 4A operation?

Yes. At 25°C ambient on a 4-layer 2oz copper evaluation board, full 4A is sustainable. However, above 85°C ambient, output current must be linearly derated-e.g., 3.2A at 100°C-to maintain junction temperature ≤150°C, per θ_JA = 29.2°C/W and thermal pad soldering quality.