Monolithic Power Systems Inc. MPM3810AGQB-AEC1-Z

Overview

MPM3810AGQB-AEC1-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, and features constant-on-time (COT) control for fast transient response-ideal for automotive camera modules and ECU power rails.

For engineers reviewing the MPM3810AGQB-AEC1-Z datasheet, MPM3810AGQB-AEC1-Z pinout, MPM3810AGQB-AEC1-Z application, or MPM3810AGQB-AEC1-Z equivalent, key selection criteria include its integrated inductor (reducing BOM count to only four external components), automotive-grade thermal performance (−40°C to +125°C junction), PG/EN sequencing capability, and hiccup-mode short-circuit protection.

Technical Context

The MPM3810AGQB-AEC1-Z implements constant-on-time (COT) control with input-voltage feed-forward, enabling stable switching frequency (2.4–4.2 MHz) across input and output voltage variations. Its internal high-side and low-side MOSFETs feature R_DS(ON) of 110 mΩ (P-FET) and 60 mΩ (N-FET), supporting forced continuous conduction mode (FCCM) and 100% duty cycle operation in dropout.

It integrates full protection: cycle-by-cycle over-current limiting (typ. 2.1 A), thermal shutdown at 150°C with 30°C hysteresis, and open-drain power-good (PG) with ±10% regulation window and 50 µs delay. The FB pin references a precise 600 mV internal bandgap (±4.5% over temperature), enabling accurate adjustable output via external resistor divider.

Key Specifications

Pinout & Package

MPM3810AGQB-AEC1-Z uses a QFN-12 (2.5 mm × 3.0 mm × 0.9 mm) package with exposed thermal pad. Pin 1 is marked by index area; the exposed paddle must be soldered to PCB ground plane for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS82084SILR and LMZ31503RVQR, MPM3810AGQB-AEC1-Z uniquely balances AEC-Q100 compliance, 1.2 A capability, minimal 6 mm² solution size, and PG/OUT_S features-making it optimal for space-constrained, safety-aware automotive modules where qualification and integration matter most.

Availability

MPM3810AGQB-AEC1-Z is available at Aetrix Electronics and suitable for automotive rear camera modules, ECU core rails, telematics subsystems, and E-Call backup power requiring stable component supply across production lifecycles.

Supply support for MPM3810AGQB-AEC1-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 global design centers and AEC-Q100-compliant manufacturing partnerships.

This part belongs to MPS's automotive-qualified MPM38xx series of integrated power modules, designed specifically for compact, high-reliability DC/DC conversion in ADAS, infotainment, and body electronics where layout simplicity and qualification are mandatory.

FAQ

What is the minimum required input capacitance for stable operation?

A 10 µF X5R/X7R ceramic capacitor placed within 2 mm of VIN and PGND pins is sufficient for most applications. For higher output voltages (>3.3 V) or high ripple sensitivity, use 22 µF. The capacitor must support ≥0.6 A RMS ripple current, per Equation (4) in the datasheet.

Can MPM3810AGQB-AEC1-Z operate without the OUT_S pin connected?

Yes-it functions as a standard buck converter without OUT_S. However, omitting the connection forfeits remote voltage sensing, degrading load regulation accuracy by up to ±1.5% under high-current PCB trace resistance. For critical rails (e.g., camera sensor cores), connect OUT_S directly to the load's VCC pin.

How does the hiccup-mode short-circuit protection behave during sustained faults?

Upon short detection, the device disables switching, discharges the soft-start capacitor, waits ~10 ms, then attempts soft-start again. This cycle repeats until the fault clears. Average input current remains below 50 mA during hiccup, preventing thermal runaway and enabling safe field recovery without power cycling.

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

Yes-an internal 1 MΩ resistor pulls EN to GND. Input leakage is ≤1 µA at 0 V and ≤1.5 µA at 2 V (per Electrical Characteristics table). This allows direct MCU GPIO control without external pull-down resistors, simplifying enable sequencing.

What is the recommended land pattern for thermal pad soldering?

Use the 2.1 mm × 2.6 mm exposed paddle land pattern specified in Figure 3 of the datasheet, with 9 thermal vias (0.3 mm diameter, 0.5 mm pitch) connecting to inner-layer ground planes. Solder paste coverage must be ≥80% to ensure θ_JA ≤65°C/W and prevent thermal derating above 85°C ambient.

Does the device support output voltages below 0.6 V?

No-the internal feedback reference is fixed at 600 mV. Output cannot be set below 0.6 V. For sub-0.6 V rails (e.g., advanced SoC cores), consider the MPM3820A (0.5 V reference) or external reference solutions-this part is optimized for 0.6–3.3 V automotive logic and interface supplies.

How is the soft-start time affected by external capacitor value?

Soft-start is fully internal and fixed at 1.5 ms typical-no external capacitor is used or required. Unlike many controllers, MPM3810AGQB-AEC1-Z integrates the soft-start ramp generator, eliminating variability from external component tolerances and ensuring consistent startup behavior across temperature and unit-to-unit.