Monolithic Power Systems Inc. MPM3810AGQB-Z

Overview

MPM3810AGQB-Z from Monolithic Power Systems is an AEC-Q100 qualified, synchronous step-down DC/DC power module integrating MOSFETs and a 0.47µH inductor in a QFN-12 package. It delivers up to 1.2A peak output current across a 2.6V–6V input range, regulates output down to 0.6V with ±10% PG threshold, and employs constant-on-time (COT) control for fast transient response-ideal for automotive rear camera modules requiring compact, robust 1.2V/1.8V rails.

For engineers reviewing the MPM3810AGQB-Z datasheet, MPM3810AGQB-Z pinout, MPM3810AGQB-Z application, or MPM3810AGQB-Z equivalent, key selection factors include its integrated inductor (reducing BOM count to only four external components), automotive-grade thermal performance (−40°C to +125°C junction), AEC-Q100 qualification, and PG/EN sequencing support for ECU power-up integrity.

Technical Context

The MPM3810AGQB-Z implements a constant-on-time (COT) control architecture with input voltage feed-forward, enabling stable switching frequency (2.4–4.2 MHz) across input and load variations while delivering fast load-step response without complex loop compensation. Its internal high-side and low-side MOSFETs feature 110 mΩ and 60 mΩ typical R_DS(ON), respectively, and operate in forced continuous conduction mode (FCCM) for consistent ripple and noise behavior.

Power sequencing is supported via dedicated EN and open-drain PG pins: EN enables operation above 1.2V logic high (with internal 1 MΩ pull-down), while PG asserts high when FB voltage remains within ±10% of 600 mV regulation-critical for automotive system boot validation. Protection includes cycle-by-cycle over-current limiting (typ. 2.1 A), hiccup-mode short-circuit recovery, and thermal shutdown at 150°C.

Key Specifications

Pinout & Package

MPM3810AGQB-Z is housed in a wettable-flank–capable QFN-12 package measuring 2.5 mm × 3.0 mm × 0.9 mm with exposed thermal pad. The package supports automated optical inspection (AOI) and enhances solder joint reliability in automotive reflow processes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPM3610AGQB-Z and TPS82084SILR, the MPM3810AGQB-Z uniquely combines 1.2 A capability, AEC-Q100 Grade 1 rating, integrated PG/EN sequencing, and wettable-flank packaging-making it the only option qualified for front-line automotive vision and connectivity systems.

Availability

MPM3810AGQB-Z is available at Aetrix Electronics and suitable for automotive rear camera modules, telematics control units, eCall emergency systems, and infotainment display interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MPM3810AGQB-Z 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 MPM3810A product line delivers fully integrated, AEC-Q100–qualified DC/DC modules targeting space- and reliability-constrained automotive subsystems such as ADAS cameras, body controllers, and infotainment power rails.

FAQ

What is the minimum input voltage required for regulation at 1.2 V output?

The MPM3810AGQB-Z maintains regulation down to 2.6 V input at 1.2 V output, with 100% duty-cycle capability enabling operation as low as ~1.5 V input under light load-verified by efficiency curves showing stable operation at VIN = 2.5 V in datasheet Figure 6.

Does the device require external compensation components?

No. The constant-on-time (COT) control architecture eliminates the need for external compensation networks. Only four passive components-input/output capacitors and FB divider resistors-are required for full operation, as confirmed in the Typical Application schematic on page 18 of the datasheet.

How is thermal performance validated for automotive use?

Thermal shutdown triggers at 150°C junction temperature with 30°C hysteresis, and the device is rated for continuous operation from −40°C to +125°C junction. AEC-Q100 qualification includes accelerated life testing (HTOL, TC, UHAST) per stress test plan Rev. 1.02, ensuring reliability over 15-year vehicle service life.

Can the OUT_S pin be left unconnected?

Yes, OUT_S may be left floating if remote sensing is unnecessary. When used, it must connect directly to the load-side terminal of the output capacitor or load point to compensate for PCB trace resistance-improving load regulation accuracy by up to 50% under high-current conditions.

What is the purpose of the N/C pins (3 and 4)?

Pins 3 and 4 are internally connected to the switching node (SW) and must remain unconnected externally. Per datasheet Package Reference (page 3), they reside over the internal SW copper area and are designated "N/C" to prevent accidental routing that could compromise EMI or thermal performance.

Is the PG pin compatible with 3.3 V logic systems?

Yes. PG is an open-drain output with internal 550 kΩ pull-up to VIN. When VIN ≥ 3.3 V, PG logic-high level reaches ≥4.0 V (per Electrical Characteristics table), safely exceeding 3.3 V logic thresholds; external pull-up to 3.3 V is optional but unnecessary.

What is the maximum recommended output capacitance?

No hard upper limit is specified, but stability analysis in the datasheet assumes 20 µF ceramic output capacitance. Larger values (e.g., 47 µF) are permissible and improve transient response, provided ESR remains <10 mΩ and layout maintains low-inductance paths to PGND.