Monolithic Power Systems Inc. MPM3808CGLE-18-AEC1-P

Overview

MPM3808CGLE-18-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 1.8V output, 2.4MHz switching frequency, and ±1% output regulation accuracy over -40°C to +150°C junction temperature. It serves as the primary voltage rail for automotive ADAS image sensors and camera modules requiring compact, thermally robust, low-EMI DC/DC conversion.

For engineers reviewing the MPM3808CGLE-18-AEC1-P datasheet, MPM3808CGLE-18-AEC1-P pinout, MPM3808CGLE-18-AEC1-P application, or MPM3808CGLE-18-AEC1-P equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and protection behavior, and real-world application constraints for camera power delivery, ADAS sensor biasing, and infotainment SoC core rails.

Technical Context

The MPM3808CGLE-18-AEC1-P implements constant-on-time (COT) control with VIN feed-forward to maintain stable 2.4MHz switching across 2.5V–6V input range, enabling fast transient response without external compensation. Its integrated 50mΩ high-side and 26mΩ low-side MOSFETs, plus 470nH inductor, form a complete buck stage optimized for FCCM operation under all load conditions.

It features automotive-grade fault management: cycle-by-cycle peak current limiting (5A HS, 3A LS), hiccup-mode short-circuit protection, thermal shutdown at 170°C, and output over-voltage protection triggered at 115% of 0.6V reference (i.e., 1.8V × 115% = 2.07V). The PG signal asserts high when VFB exceeds 90% of 0.6V (i.e., ≥0.54V), confirming regulated 1.8V output within tolerance.

Key Specifications

Pinout & Package

MPM3808CGLE-18-AEC1-P is housed in a wettable flank QFN-15 package (3mm × 4mm × 1.6mm) with exposed thermal pad, supporting automated optical inspection (AOI) and enhanced solder joint reliability for automotive reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS82084 and LTM8071, MPM3808CGLE-18-AEC1-P uniquely combines AEC-Q100 Grade 1 qualification, wettable flank QFN-15, integrated PG signaling, and 3A capability in a 3mm×4mm footprint-making it the only drop-in solution for space-constrained, safety-aware automotive camera and radar power rails.

Availability

MPM3808CGLE-18-AEC1-P is available at Aetrix Electronics and suitable for automotive camera modules, ADAS sensor biasing, and infotainment SoC core rails requiring stable component supply, AEC-Q100 compliance, and production-ready thermal performance.

Supply support for MPM3808CGLE-18-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-efficiency power management ICs and modules, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MPM3808C product line delivers fully integrated, AEC-Q100-qualified DC/DC modules targeting automotive ADAS, infotainment, and body electronics-designed to replace discrete buck converters while meeting stringent size, thermal, and reliability requirements.

FAQ

What is the minimum input voltage required for MPM3808CGLE-18-AEC1-P to regulate 1.8V output?

The device requires a minimum 2.5V input to maintain regulation at 1.8V output. Below 2.5V, the under-voltage lockout (UVLO) circuit disables switching; the rising UVLO threshold is 2.45V, with 0.2V hysteresis, ensuring stable startup after brownout recovery.

Does MPM3808CGLE-18-AEC1-P require external compensation components?

No. The module integrates a complete compensation network-including error amplifier, ramp generator, and internal resistors-enabling immediate operation with only input/output capacitors and optional soft-start capacitor. No external RC networks or type-II/III compensators are needed.

How does the power-good (PG) signal behave during startup and fault conditions?

PG asserts high when FB voltage reaches ≥90% of 0.6V (≥0.54V), indicating valid 1.8V output. During short-circuit or over-voltage events, PG pulls low within 70µs deglitch time. If EN is pulled low, PG releases open-drain after 11µs turn-off delay, allowing external pull-up to float high.

Can MPM3808CGLE-18-AEC1-P operate with pre-biased output voltage?

Yes. The device supports pre-biased start-up: when EN rises above 0.9V, it initiates soft-start regardless of existing VOUT voltage. The internal discharge path (120Ω) is automatically disabled during this mode, preventing reverse current flow into the output capacitor.

What is the thermal performance difference between the wettable flank and standard QFN versions?

The wettable flank QFN-15 (used in MPM3808CGLE-18-AEC1-P) achieves θJC = 10°C/W on the evaluation board-25% lower than standard QFN-due to enhanced copper pillar interconnects. This translates to ~2.5°C lower junction temperature at 3A load, critical for sustained operation in sealed ADAS housings.

Is the 1.8V output voltage trimmed or guaranteed across temperature and load?

Yes. The fixed 1.8V output is trimmed at wafer test to ±1% accuracy at 25°C and guaranteed ±1.8% (1.764V–1.836V) across -40°C to +150°C junction temperature and 0–3A load, per electrical characteristics table on page 7 of the datasheet.

What failure modes trigger hiccup-mode short-circuit protection?

Hiccup mode activates when VFB drops below 50% of 0.6V (≤0.3V), indicating a hard short at the output. The device disables switching, discharges the SS capacitor, waits for full discharge (~10ms), then attempts restart. This repeats until fault removal, limiting average power dissipation to <100mW during sustained short.