Monolithic Power Systems Inc. MPM3810AGQB-P

Overview

MPM3810AGQB-P from Monolithic Power Systems is an AEC-Q100 qualified, synchronous step-down DC/DC power module with integrated inductor and MOSFETs, delivering up to 1.2A peak output current across a 2.6V–6V input range, regulating output down to 0.6V with ±10% power-good window, and featuring constant-on-time (COT) control for fast transient response-used in automotive rear camera modules and ECU sub-rail supplies.

For engineers reviewing the MPM3810AGQB-P datasheet, MPM3810AGQB-P pinout, MPM3810AGQB-P application, or MPM3810AGQB-P equivalent, this page delivers verified electrical specs, QFN-12 pin functions, automotive-grade thermal shutdown (150°C), cycle-by-cycle OCP, and PG/EN sequencing support-critical for infotainment and telematics power design validation.

Technical Context

The MPM3810AGQB-P implements constant-on-time (COT) control with input voltage feed-forward, fixing minimum off-time at 60ns and maintaining switching frequency between 2.4MHz–4.2MHz across input and load conditions. Its internal high-side FET (RDSON_P = 110–170mΩ) and low-side FET (RDSON_N = 60–130mΩ) operate in forced continuous conduction mode (FCCM).

It integrates a 0.47µH shielded inductor (RDCR = 125mΩ) and supports 100% duty-cycle operation in dropout. The feedback reference is tightly regulated at 600mV (±4.5%), with PG asserting high when FB stays within ±10% of regulation and sinking ≥1mA at 0.4V under fault.

Key Specifications

Pinout & Package

MPM3810AGQB-P is housed in a wettable-flank QFN-12 package measuring 2.5mm × 3.0mm × 0.9mm with exposed thermal pad. The package supports automated optical inspection (AOI) and improves solder joint reliability in 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 TPS82084SILR and RT7297BZSP, the MPM3810AGQB-P uniquely combines AEC-Q100 Grade 1 rating, integrated inductor, remote sensing (OUT_S), and hiccup-mode SCP-making it the only option qualified for safety-critical camera and E-Call subsystems without redesign.

Availability

MPM3810AGQB-P is available at Aetrix Electronics and suitable for automotive rear camera modules, telematics control units, and infotainment display subsystems requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.

Supply support for MPM3810AGQB-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 MPM3810A product line delivers fully integrated, AEC-Q100-qualified DC/DC modules targeting space-constrained automotive subsystems requiring high reliability, low EMI, and simplified layout-especially camera, radar, and connectivity modules.

FAQ

What is the maximum ambient temperature for continuous 1.2A operation?

At 1.2A load and VIN = 5V, the MPM3810AGQB-P sustains continuous operation up to +85°C ambient with standard 4-layer PCB layout and 2oz copper; derating begins above that point per the "Maximum IOUT vs. Ambient Temperature" curve on page 6 of the datasheet.

Does OUT_S require a dedicated PCB trace, and what happens if left unconnected?

Yes-OUT_S must be routed as a Kelvin sense trace directly to the load's power input pad. If left unconnected, regulation accuracy degrades by up to ±3% due to PCB trace IR drop; the device operates normally but loses remote-sense benefit.

How does the PG pin behave during thermal shutdown?

During thermal shutdown, the PG pin is actively pulled low by an internal MOSFET (RDS(ON) < 400Ω), signaling loss of regulation. PG remains low until junction temperature falls below 120°C (150°C – 30°C hysteresis) and output recovers to within ±10% of target.

Can the MPM3810AGQB-P operate without the external soft-start capacitor?

Yes-the MPM3810AGQB-P has a built-in 1.5ms soft-start timer and requires no external capacitor. Adding one is unnecessary and may interfere with internal timing; the datasheet specifies no external SS component.

What is the recommended input capacitor configuration for 6V input with 1.2A load?

Use a 10μF X5R/X7R ceramic capacitor placed ≤1mm from VIN and PGND pins. For enhanced stability at 6V, add a 22μF ceramic in parallel; total RMS current rating must exceed 600mA per Equation (4) in the datasheet.

Is the EN pin internally pulled down, and what is its leakage current?

Yes-an internal 1MΩ resistor pulls EN to GND. Leakage current is ≤1μA at 0V and ≤1.5μA at 2V (per Electrical Characteristics table, page 4), ensuring reliable disable state with open-circuit EN.

Does the device support forced PWM mode at light load, or only FCCM?

It operates exclusively in Forced Continuous Conduction Mode (FCCM) across all loads-no pulse-skipping or diode-emulation modes. This guarantees constant switching frequency and predictable EMI behavior, critical for automotive EMC compliance.