Monolithic Power Systems Inc. MPQ4313GRE-5-AEC1-P

Overview

MPQ4313GRE-5-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter delivering up to 3A continuous output at fixed 5V with integrated 48mΩ high-side and 20mΩ low-side MOSFETs. It operates from 3.3V to 45V input, features 1.7μA shutdown current, frequency spread spectrum (FSS) for CISPR25 Class 5 EMI compliance, and supports automotive cold-crank low-dropout mode. It is deployed in infotainment power rails requiring stable 5V supply under wide-input transients.

For engineers reviewing the MPQ4313GRE-5-AEC1-P datasheet, MPQ4313GRE-5-AEC1-P pinout, MPQ4313GRE-5-AEC1-P application, or MPQ4313GRE-5-AEC1-P equivalent, key selection criteria include its AEC-Q100 qualification, 5V fixed output accuracy (±2%), 100ns minimum on-time, programmable 350–1000kHz switching frequency, and wettable flank QFN-20 package for automated optical inspection.

Technical Context

The MPQ4313GRE-5-AEC1-P implements current-mode control with selectable Advanced Asynchronous Mode (AAM) or Forced Continuous Conduction Mode (FCCM), enabling optimized light-load efficiency or consistent ripple performance. Its internal gate drivers support high-duty-cycle operation down to 0.8V VIN–VOUT differential during cold-crank events.

It integrates frequency foldback at startup to prevent inductor current runaway, hiccup-mode over-current protection, thermal shutdown at 170°C, and a precision 0.815V feedback reference with ±1.5% variation over temperature. The open-drain PG signal asserts when VOUT remains within 95–105% of nominal 5V, with 35μs response delay.

Key Specifications

Pinout & Package

MPQ4313GRE-5-AEC1-P uses a thermally enhanced QFN-20 (4mm × 4mm) package with exposed thermal pad and wettable flanks for reliable reflow and automated optical inspection. Pin 1 is marked by a dot; top marking includes "MP4313" prefix, year/week code, lot number, and "E" for wettable flank.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous step-down converter applications.

Compared with MPQ4312GRE-5-AEC1-P and MPQ4314GRE-5-AEC1-P, the MPQ4313GRE-5-AEC1-P delivers optimal balance of 3A capability, thermal performance (θJA = 44°C/W), and footprint-making it the preferred choice for mid-tier automotive modules where 2A is insufficient and 4A incurs unnecessary cost or thermal overhead.

Availability

MPQ4313GRE-5-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, instrument cluster, ADAS camera, and industrial telematics applications requiring stable component supply with AEC-Q100 Grade 1 assurance and long-term production continuity.

Supply support for MPQ4313GRE-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 over two decades of expertise in DC/DC conversion, motor drivers, and LED lighting solutions.

The MPQ4313 belongs to MPS's automotive-grade synchronous buck converter product line, engineered specifically for demanding 12V/24V vehicle subsystems requiring AEC-Q100 qualification, low EMI, and robust transient response under cold-crank and load-dump conditions.

FAQ

What is the purpose of the MODE pin on MPQ4313GRE-5-AEC1-P?

The MODE pin selects between Advanced Asynchronous Mode (AAM) and Forced Continuous Conduction Mode (FCCM). Pulling MODE low enables AAM for highest light-load efficiency (18μA IQ), while pulling high forces FCCM for consistent switching frequency and lower output ripple. Leaving it floating is prohibited due to undefined behavior.

Does MPQ4313GRE-5-AEC1-P require an external feedback resistor divider?

No. The "-5" suffix denotes the fixed 5V output version; the FB pin is internally connected to the 0.815V reference and must be shorted directly to VOUT. An external resistor divider is only required for the adjustable-output MPQ4313GRE-AEC1-P variant.

How is EMI performance achieved without external filters?

MPQ4313GRE-5-AEC1-P achieves CISPR25 Class 5 compliance through integrated Frequency Spread Spectrum (FSS), symmetric VIN layout, and optimized internal gate drive timing. These reduce peak spectral energy and common-mode noise, eliminating the need for ferrite beads or Y-capacitors in most reference designs.

What thermal derating applies above 25°C ambient?

With θJA = 44°C/W on a standard 4-layer JEDEC board, the device delivers full 3A up to ~70°C ambient before thermal limiting begins. Derating follows PD(MAX) = (150°C − TA)/44°C/W; at 100°C ambient, max continuous power drops to ~1.14W, corresponding to ~1.8A at 5V output.

Can MPQ4313GRE-5-AEC1-P synchronize to an external clock?

Yes. Applying a 350–1000kHz square wave to the SYNCIN pin synchronizes the internal oscillator. The SYNCO pin then outputs a 180° phase-inverted copy, enabling interleaved operation with other converters to reduce input ripple current.

Is the wettable flank feature mandatory for assembly?

No, but strongly recommended for automotive production. Wettable flanks enable automated optical inspection (AOI) of solder fillets on all 20 perimeter leads, significantly improving first-pass yield and field-reliability validation versus standard QFN packages.

What protection features are built into MPQ4313GRE-5-AEC1-P?

It integrates hiccup-mode over-current protection, thermal shutdown at 170°C with 20°C hysteresis, input UVLO (2.7V falling threshold), power-good monitoring, frequency foldback at startup, and low-dropout operation. All protections are fully autonomous and require no external components.