Monolithic Power Systems Inc. MPQ4323CGLE-AEC1-P

Overview

MPQ4323CGLE-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter optimized for automotive environments. It delivers 3A continuous output current with 3.3V–36V input range, 42V load dump tolerance, and configurable switching frequency (350kHz–2.5MHz) in a QFN-12 (3mm×4mm) wettable flank package. Used in infotainment power rails where cold-crank (3.1V VIN min) and EMI robustness are critical.

For engineers reviewing the MPQ4323CGLE-AEC1-P datasheet, MPQ4323CGLE-AEC1-P pinout, MPQ4323CGLE-AEC1-P application, or MPQ4323CGLE-AEC1-P equivalent, key selection criteria include its 1μA shutdown current, integrated 70mΩ/50mΩ MOSFETs, CISPR25 Class 5 compliance, low-dropout mode for cold-crank, and thermal performance in QFN-12 (3mm×4mm) with θJC = 3.7°C/W.

Technical Context

The MPQ4323CGLE-AEC1-P employs peak current mode control with frequency foldback during start-up to prevent inductor current runaway. Its dual-VIN pin architecture enables symmetric PCB layout for reduced EMI, while MeshConnect™ flip-chip packaging enhances thermal dissipation and solder joint reliability.

It integrates high-side and low-side MOSFETs with 70mΩ and 50mΩ R_DS(on), supports forced CCM and hiccup-mode OCP, and features a precision 0.8V ±1% feedback reference with ±1.5% PG threshold hysteresis. The device operates across –40°C to +150°C junction temperature with automotive-grade biasing and protection logic.

Key Specifications

Pinout & Package

MPQ4323CGLE-AEC1-P uses a QFN-12 (3mm × 4mm) package with wettable flanks for automated optical inspection (AOI) and enhanced solder joint reliability. The package includes two VIN pins (pins 2 & 10), dual PGND (pins 1 & 11), and NC pins (pins 2 & 12) that may be tied to ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ4323CGDE-AEC1-P, the CGLE variant offers superior thermal performance (3.7°C/W vs. 3.5°C/W) in a slightly larger footprint; versus CGRHE-AEC1-P, it trades one NC pin for identical thermal metrics but tighter layout constraints due to 12-pin count.

Availability

MPQ4323CGLE-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and instrument cluster power supplies requiring stable component supply, AEC-Q100 compliance, and production-ready lead times.

Supply support for MPQ4323CGLE-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.

The MPQ4323C product line targets automotive power conversion with AEC-Q100 qualification, load dump resilience, and integrated EMI mitigation-designed specifically for infotainment, cluster, and ADAS subsystems.

FAQ

What is the minimum input voltage required for startup?

The MPQ4323CGLE-AEC1-P has a VIN UVLO rising threshold of 3.4V to 3.9V (typ. 3.65V). Startup occurs only when input exceeds this threshold; once running, it sustains regulation down to 3.1V during cold-crank conditions, verified per AEC-Q100 test conditions.

How is the switching frequency set and what resistor values correspond to common frequencies?

Frequency is set by connecting a resistor from FREQ pin to GND. For example: 86.6kΩ yields 415kHz (typ.), 34.8kΩ yields 1MHz (typ.), and 15kΩ yields 2.2MHz (typ.). The relationship is linear and documented in the Electrical Characteristics table on page 7 of the datasheet.

Does the device support both adjustable and fixed-output configurations?

Yes-the MPQ4323C base part supports both. Adjustable versions use external resistor dividers on FB; fixed-output variants (e.g., MPQ4323GQ-AEC1) have internal feedback and require no external resistors. The CGLE-AEC1-P is the adjustable version.

What is the purpose of the two VIN pins and how should they be routed?

Pins 2 and 10 are internally connected VIN inputs. They enable symmetric, low-inductance routing from input capacitors-critical for minimizing high-frequency loop area and reducing radiated EMI. Each pin should connect to its own local 10µF ceramic capacitor.

Is the PG pin actively driven or open-drain, and what pull-up value is recommended?

The PG pin is open-drain and requires an external pull-up resistor. A 10kΩ resistor to VOUT is typical; this ensures fast rise time while limiting current to <100µA during fault conditions. Do not leave PG floating-unconnected PG defaults to "not good" state.

How does the low-dropout mode operate during cold-crank?

In low-dropout mode, the high-side MOSFET operates in linear regulation when VIN approaches VOUT, maintaining output stability down to 3.1V input. This avoids dropout-induced brownout resets in instrument clusters during engine cranking, confirmed across –40°C to +150°C.

What is the significance of the "E" suffix in MPQ4323CGLE-AEC1-P?

The "E" denotes wettable flank construction-exposed copper on package side walls enabling automated optical inspection of solder fillets. This is mandatory for automotive production lines requiring 100% solder joint verification per IPC-A-610 Class 3 standards.