Monolithic Power Systems Inc. MPM3806GLE-AEC1-P

Overview

MPM3806GLE-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, fully integrated synchronous step-down power module with built-in inductor and MOSFETs, delivering up to 1A continuous output current across a 2.5V–5.5V input range, ±1% feedback accuracy, and 2.4MHz switching frequency for compact automotive power rails.

For engineers reviewing the MPM3806GLE-AEC1-P datasheet, MPM3806GLE-AEC1-P pinout, MPM3806GLE-AEC1-P application, or MPM3806GLE-AEC1-P equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and protection specs, and real-world ADAS/camera module implementation guidance - all grounded in the official Rev. 1.0 datasheet.

Technical Context

The MPM3806GLE-AEC1-P implements constant-on-time (COT) control with VIN feed-forward, enabling stable 2.4MHz switching across its full 2.5V–5.5V input range and fast transient response without external loop compensation. Its integrated 75mΩ/45mΩ HS/LS MOSFETs and 470nH inductor support high-efficiency operation from light-load (21µA IQ in sleep mode) to full 1A load.

It features dual-stage protection: cycle-by-cycle peak/valley current limiting (1.6–3.4A peak), thermal shutdown at 170°C with 20°C hysteresis, and hiccup-mode OVP/SCP. The open-drain PG signal asserts when VFB exceeds 90% of 0.6V reference, and EN enables precise power sequencing with 0.9V rising threshold.

Key Specifications

Pinout & Package

MPM3806GLE-AEC1-P is housed in a wettable flank QFN-15 package (3mm × 4mm × 1.6mm) with exposed thermal pad, optimized for automotive reflow inspection and board-level thermal performance (θJA = 65°C/W on JEDEC 4-layer board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPM3806GLE-AEC1-P, MPM3805GLE-AEC1-P trades current capacity for cost in lower-power automotive nodes, while TPS82084SILR sacrifices qualification and manufacturability for size - neither matches the full AEC-Q100 Grade 1 + wettable flank + 1A + discharge capability combination.

Availability

MPM3806GLE-AEC1-P is available at Aetrix Electronics and suitable for automotive camera modules, ADAS sensor power rails, and infotainment SoC core supplies requiring stable component supply, AEC-Q100 traceability, and production-ready packaging.

Supply support for MPM3806GLE-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 design centers in the US, China, and Taiwan.

The MPM3806 product line delivers fully integrated, AEC-Q100-qualified power modules targeting space-constrained, thermally demanding automotive subsystems such as camera, radar, and V2X electronics.

FAQ

Is MPM3806GLE-AEC1-P pin-compatible with other MPM38xx variants?

Yes - MPM3806GLE-AEC1-P shares identical QFN-15 (3mm×4mm) pinout and footprint with MPM3805GLE-AEC1-P and MPM3807GLE-AEC1-P, enabling drop-in replacement within the same current class. However, fixed-output versions (e.g., MPM3806GLE-12-AEC1-P) require FB pin floating, unlike the adjustable MPM3806GLE-AEC1-P which uses FB for regulation.

What is the purpose of the OUT_S pin, and can it be left unconnected?

The OUT_S pin serves dual roles: it senses output voltage for regulation feedback and provides a 150Ω internal discharge path to GND during shutdown. Leaving it unconnected disables output discharge, potentially causing slow rail collapse. For fast, controlled discharge, connect OUT_S directly to GND; to block discharge, place a capacitor between OUT_S and VOUT per datasheet Figure 23.

Does MPM3806GLE-AEC1-P support adjustable output voltage, and what is the minimum achievable VOUT?

Yes - MPM3806GLE-AEC1-P is the adjustable-output variant. With FB referenced to 0.6V internal VREF, minimum VOUT is 0.6V (achieved with FB tied directly to VOUT). Typical configurations use resistor dividers to set 1.2V, 1.8V, or other values; the datasheet confirms stable operation down to 0.6V across temperature and load.

How does the Constant-On-Time (COT) control improve transient response compared to voltage-mode control?

COT control eliminates the need for external compensation by making switching frequency dependent on input voltage and load, resulting in inherently faster response to load steps. When VFB drops below 0.6V, the high-side FET turns on immediately with fixed on-time determined by VIN/VOUT ratio - bypassing error amplifier delay and phase-margin constraints of traditional loops.

What thermal derating applies when operating at 150°C junction temperature?

At TJ = 150°C, the device remains fully functional per AEC-Q100 Grade 1 spec, but output current must be limited to maintain safe operation. With θJA = 65°C/W, maximum allowable power dissipation is PD(MAX) = (150°C − TA)/65. At TA = 85°C, PD(MAX) = 1W - corresponding to ~0.8A at 1.2V output, requiring careful thermal design or airflow in sealed enclosures.

Can the PG signal drive a microcontroller GPIO directly, or is external buffering required?

PG is an open-drain output rated for 1mA sink current with VOL ≤ 0.4V. It can directly interface with 3.3V or 5V MCU GPIOs using a pull-up resistor (e.g., 10kΩ to 3.3V). No buffering is needed for standard logic-level detection; however, long PCB traces may require series termination to suppress ringing due to the 80µs deglitch timing.

What failure modes are covered by the hiccup-mode OVP and SCP protections?

Hiccup-mode OVP triggers when VOUT exceeds 115% of VFB (e.g., 0.69V), latching off the converter until auto-recovery after a timeout. SCP activates when valley current falls below 0.4A or peak current exceeds 3.4A, entering repeated on/off cycling to limit average power and prevent MOSFET thermal runaway - protecting against shorted outputs or failed downstream loads.