Monolithic Power Systems Inc. MPM3806CGLE-12-AEC1-P

Overview

MPM3806CGLE-12-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, fully integrated synchronous step-down power module with internal MOSFETs and inductor, delivering 1A continuous output at fixed 1.2V from 2.5V–5.5V input. It features constant-on-time (COT) control, 2.4MHz switching, wettable flank QFN-15 package, and power-good signaling for automotive ADAS sensors and camera modules.

For engineers reviewing the MPM3806CGLE-12-AEC1-P datasheet, MPM3806CGLE-12-AEC1-P pinout, MPM3806CGLE-12-AEC1-P application, or MPM3806CGLE-12-AEC1-P equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade thermal and EMC performance, and real-world design implications for space-constrained vehicle subsystems.

Technical Context

The MPM3806CGLE-12-AEC1-P implements constant-on-time (COT) control with input voltage feed-forward to maintain stable 2.4MHz switching across its 2.5V–5.5V input range and full 0–1A load. Its FCCM operation ensures continuous conduction mode under all loads, eliminating frequency variation and minimizing output ripple.

It integrates a 470nH inductor with 25mΩ DCR, 75mΩ high-side and 45mΩ low-side MOSFETs, and a dedicated OUT_S sense/discharge path enabling controlled output discharge during shutdown. The fixed 1.2V output version internally connects FB to reference, eliminating external resistors while retaining PG monitoring at 90% VREF threshold.

Key Specifications

Pinout & Package

MPM3806CGLE-12-AEC1-P uses a wettable flank QFN-15 package (3mm × 4mm × 1.6mm) with exposed thermal pad for enhanced heat dissipation in automotive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS82084SILR and MAX20004AATP+T, MPM3806CGLE-12-AEC1-P uniquely combines AEC-Q100 Grade 1, wettable flanks, integrated OUT_S discharge, and FCCM operation-making it the only option qualified for ASIL-B camera and radar subsystems requiring full diagnostic coverage and rapid power-down.

Availability

MPM3806CGLE-12-AEC1-P is available at Aetrix Electronics and suitable for automotive camera modules, ADAS sensors, infotainment head units, and V2X communication systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.

Supply support for MPM3806CGLE-12-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 and modules, with over two decades of innovation in integrated power solutions.

The MPM3806C product line delivers fully encapsulated, AEC-Q100-qualified DC/DC modules targeting space-constrained automotive subsystems-including camera, radar, and infotainment-where reliability, thermal performance, and EMI robustness are critical.

FAQ

What is the purpose of the OUT_S pin on MPM3806CGLE-12-AEC1-P?

The OUT_S pin provides a dedicated 150Ω discharge path from the regulated output to ground during shutdown, ensuring rapid collapse of the 1.2V rail. This supports functional safety requirements in ASIL-B systems where controlled power-down is mandatory. Unlike general-purpose GND pins, OUT_S is internally routed to a dedicated discharge FET and must be connected directly to the output capacitor's ground node.

Can MPM3806CGLE-12-AEC1-P operate with input voltage below 2.5V?

No. The device has a hard under-voltage lockout (UVLO) with a rising threshold of 2.45V and hysteresis of 0.2V. Operation below 2.3V input is prohibited, and the part will remain disabled until VIN exceeds 2.45V. This ensures stable startup and prevents erratic behavior during cold-crank or brownout conditions common in automotive 12V systems.

How does the PG pin behave during startup and fault conditions?

PG is an open-drain output pulled low during startup until VFB reaches 90% of 0.6V (≥540mV), then pulled high by an external pull-up resistor. If VFB drops to ≤85% of 0.6V (≤510mV) during operation-due to overload, short circuit, or input dropout-PG is actively pulled to GND within 80µs, signaling a fault to the host controller.

Is external compensation required for MPM3806CGLE-12-AEC1-P?

No. The device integrates a complete compensation network optimized for its internal 470nH inductor and MOSFETs. No external RC components are needed-unlike adjustable buck controllers-reducing design risk and layout complexity. Stability is guaranteed across the full 0–1A load range and -40°C to +150°C temperature span.

What distinguishes the wettable flank QFN-15 package from standard QFN?

The wettable flank design exposes vertical sidewalls of each lead, enabling automated optical inspection (AOI) of solder fillets during reflow. This is required for zero-defect automotive manufacturing per IATF 16949, unlike standard QFN packages where solder joints are hidden beneath the body and require X-ray verification.

Does MPM3806CGLE-12-AEC1-P support pre-biased start-up?

Yes. When EN is asserted high, the device initiates soft-start regardless of existing voltage on the output capacitor-even if pre-charged to 1.2V. This avoids reverse current flow and ensures safe power sequencing in multi-rail systems where downstream circuits may retain charge during reset cycles.

How is thermal performance validated for AEC-Q100 Grade 1 compliance?

Thermal validation includes 1,000-hour high-temperature operating life (HTOL) testing at 150°C junction temperature, plus thermal cycling from -40°C to +150°C for 1,000 cycles. Measured θJA = 65°C/W on JEDEC-standard 4-layer board confirms sustained 1A operation without derating in automotive ambient conditions.