Monolithic Power Systems Inc. MPM3810AGQB-AEC1-P

Overview

MPM3810AGQB-AEC1-P 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 employs constant-on-time (COT) control for fast transient response-used in automotive rear camera modules and ECU power rails.

For engineers reviewing the MPM3810AGQB-AEC1-P datasheet, MPM3810AGQB-AEC1-P pinout, MPM3810AGQB-AEC1-P application, or MPM3810AGQB-AEC1-P equivalent, key selection criteria include its integrated inductor, AEC-Q100 qualification, 1.2A peak current capability, PG and EN pins for sequencing, and thermal shutdown with hiccup-mode short-circuit protection.

Technical Context

The MPM3810AGQB-AEC1-P uses constant-on-time (COT) control with input voltage feed-forward to maintain stable switching frequency (2.4–4.2 MHz) across input and output variations. Its internal 0.47µH inductor and dual MOSFETs eliminate external magnetics and simplify layout.

It operates in forced continuous conduction mode (FCCM), supports 100% duty cycle in dropout, and integrates cycle-by-cycle over-current protection plus thermal shutdown at 150°C with 30°C hysteresis-enabling robust operation in automotive ambient ranges from −40°C to +125°C.

Key Specifications

Pinout & Package

MPM3810AGQB-AEC1-P is housed in a thermally enhanced QFN-12 (2.5mm × 3.0mm × 0.9mm) package with exposed thermal pad. The package supports reflow soldering per JEDEC MO-220 and features wettable flanks on the -AEC1 variant for automated optical inspection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS82084SILR and RTQ2132BGQW, the MPM3810AGQB-AEC1-P uniquely balances AEC-Q100 compliance, full integration (inductor + MOSFETs), PG/EN sequencing, and minimal 6mm×3.8mm solution size-making it optimal for space-constrained, safety-aware automotive subsystems.

Availability

MPM3810AGQB-AEC1-P is available at Aetrix Electronics and suitable for automotive rear camera modules, ECU power supplies, and telematics units requiring stable component supply under AEC-Q100-compliant manufacturing and traceability.

Supply support for MPM3810AGQB-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 design centers in the US, China, and Taiwan.

The MPM3810A product line delivers fully integrated, AEC-Q100-qualified DC/DC modules targeting compact, thermally constrained automotive subsystems-including cameras, sensors, and communication nodes-where reliability and minimal external components are critical.

FAQ

What is the maximum recommended output capacitance for stable operation?

The MPM3810AGQB-AEC1-P supports output capacitors up to 100µF ceramic without instability. Stability is maintained using Equation (7) from the datasheet: ΔVOUT ≈ (VOUT/VIN) × (1−VOUT/VIN) / (8 × fSW × L × COUT). For 1.2V/5V operation at 3.5MHz, ≥22µF is recommended to keep ripple below 15mVpp.

Does the OUT_S pin require a dedicated PCB trace?

Yes. OUT_S must be routed as a Kelvin sense connection-separate from the main OUT power trace-to the load-side of the output capacitor or directly to the load's VCC pin. This avoids voltage drop errors from PCB resistance and ensures accurate regulation under dynamic load conditions.

Can the MPM3810AGQB-AEC1-P operate without the FB resistor divider?

No. The FB pin requires an external resistor divider to set VOUT. Omitting R1/R2 leaves FB floating, causing unregulated output and potential device damage. Minimum R1 is 40kΩ (per datasheet Table 1); values below 20kΩ increase quiescent current and reduce light-load efficiency.

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

Upon short-circuit detection, the MPM3810AGQB-AEC1-P disables the power stage, discharges the soft-start capacitor, waits ~5ms, then attempts restart. Each failed cycle repeats this pattern-limiting average power dissipation to <150mW and preventing thermal damage while enabling automatic recovery when fault clears.

Is the thermal pad electrically connected to PGND?

Yes. The exposed thermal pad is internally connected to PGND and must be soldered to a solid copper thermal plane tied to the PGND net. Failure to do so degrades thermal performance (θJA increases from 65°C/W to >100°C/W) and risks thermal shutdown under 1A load at +85°C ambient.

What is the minimum input capacitor value for 6V input operation?

For 6V input and 1.2A load, a minimum 10µF X5R/X7R ceramic capacitor is required. At VIN=6V, RMS input current reaches ~0.6A; the capacitor must support ≥0.3A RMS rating and be placed within 2mm of VIN and PGND pins to suppress high-frequency switching noise.

Does the EN pin have internal hysteresis?

No. EN has no built-in hysteresis; its thresholds are 1.2V (enable) and 0.4V (disable) with 300mV UVLO hysteresis applied to VIN-not EN. To prevent chatter during slow-rising enable signals, add a simple RC network (e.g., 100kΩ + 100pF) between EN and ground.