Monolithic Power Systems Inc. MPM3808CGLE-08-AEC1-P

Overview

MPM3808CGLE-08-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 3A continuous output current at a fixed 0.8V output voltage, 2.4MHz switching frequency, and ±2% output regulation accuracy over -40°C to +150°C junction temperature. It serves as the primary DC/DC converter for automotive camera modules requiring compact, thermally robust, and EMI-optimized power delivery.

For engineers reviewing the MPM3808CGLE-08-AEC1-P datasheet, MPM3808CGLE-08-AEC1-P pinout, MPM3808CGLE-08-AEC1-P application, or MPM3808CGLE-08-AEC1-P equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and EMC specifications, and real-world substitution guidance for ADAS power rail design.

Technical Context

The MPM3808CGLE-08-AEC1-P implements constant-on-time (COT) control with VIN feed-forward to maintain stable 2.4MHz switching across 2.5V–6V input range and full load, enabling fast transient response without external compensation. Its FCCM operation ensures continuous inductor current under all loads, eliminating audible noise and improving light-load efficiency.

It integrates 50mΩ high-side and 26mΩ low-side MOSFETs with a 470nH internal inductor (typ), supporting 100% duty cycle for low-dropout operation. The fixed 0.8V output version eliminates FB resistor divider, simplifying layout while retaining PG monitoring, EN sequencing, SS-controlled startup, and hiccup-mode short-circuit protection.

Key Specifications

Pinout & Package

MPM3808CGLE-08-AEC1-P is housed in a QFN-15 (3mm × 4mm × 1.6mm) package with wettable flank terminations for automotive-grade solder joint inspection and thermal performance. Pin 15 (DNC) is internally connected to SW and must remain unconnected on PCB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS6286418RTER and RTQ2132BGQW, the MPM3808CGLE-08-AEC1-P uniquely combines AEC-Q100 Grade 1, wettable flanks, integrated inductor/MOSFETs, and FCCM in a 3×4mm footprint-making it the only drop-in solution for space-constrained, production-ready automotive camera power rails.

Availability

MPM3808CGLE-08-AEC1-P is available at Aetrix Electronics and suitable for automotive camera modules, ADAS sensor subsystems, and infotainment head-units requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle assurance.

Supply support for MPM3808CGLE-08-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 leadership in integrated DC/DC conversion.

The MPM3808C product line delivers fully integrated, AEC-Q100-qualified power modules targeting automotive vision and sensing systems where board area, thermal performance, and EMI compliance are critical design constraints.

FAQ

What is the minimum input voltage required for reliable startup at 0.8V output?

The MPM3808CGLE-08-AEC1-P has a guaranteed UVLO rising threshold of 2.45V and supports startup down to 2.5V input. At VIN = 2.5V, it delivers full 3A output with >85% efficiency and maintains regulation within ±2% across temperature, verified per AEC-Q100 stress testing.

Does the 0.8V fixed-output version require any external feedback resistors?

No. The MPM3808CGLE-08-AEC1-P uses internal resistor trimming to set the 0.8V output; the FB pin (Pin 1) must be left floating. This eliminates layout sensitivity, reduces BOM count, and improves production yield versus adjustable versions requiring precision external dividers.

How does the soft-start behavior differ between the 0.8V and other fixed-output variants?

The 0.8V variant uses a higher 16µA SS charge current (vs. 3µA for 1.2V/1.8V), resulting in faster ramp-up. With a 10nF SS capacitor, tSS ≈ 0.375ms-enabling rapid power-on sequencing for camera wake-from-sleep modes while limiting inrush to <1.5A peak.

Can the PG pin drive a microcontroller GPIO directly without a pull-up resistor?

No. PG is open-drain and requires an external pull-up (typically 10kΩ to 3.3V or 5V). When VFB ≥ 90% of 0.6V, PG pulls high; below 85%, it sinks to GND. Floating PG will not assert valid logic levels and may cause false system reset or boot failure.

Is thermal derating required above 85°C ambient temperature?

Yes. With θJA = 65°C/W on standard JEDEC board, maximum power dissipation drops from 2.4W at 25°C to ~1.3W at 85°C ambient. For continuous 3A operation above 85°C, forced airflow or enhanced PCB copper is required to maintain TJ ≤ 150°C per AEC-Q100 Grade 1 limits.

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

OUT_S provides a dedicated 120Ω discharge path from VOUT to GND during shutdown, ensuring rapid rail collapse for safe power sequencing. Leaving it unconnected disables discharge, risking hold-up voltage that may interfere with downstream logic reset timing-so it must be connected per design.

Does the device support pre-biased output startup?

Yes. The MPM3808CGLE-08-AEC1-P initiates soft-start even when VOUT is pre-charged (e.g., from backup rail), preventing reverse current flow and ensuring monotonic voltage ramp. This is validated across -40°C to +125°C and required for automotive cold-crank recovery sequences.