Monolithic Power Systems Inc. MPQ3410DJ-LF-P

Overview

MPQ3410DJ-LF-P from Monolithic Power Systems is a synchronous rectified step-up DC-DC converter with AEC-Q100 Grade 1 qualification, designed for automotive and industrial power rails requiring input-to-output isolation in shutdown mode. It delivers up to 6V output from 1.8–6V input, integrates 1.3A N-channel and P-channel MOSFETs, operates at 550kHz fixed frequency, and features internal soft-start, inrush current limiting, and thermal shutdown.

For engineers reviewing the MPQ3410DJ-LF-P datasheet, MPQ3410DJ-LF-P pinout, MPQ3410DJ-LF-P application, or MPQ3410DJ-LF-P equivalent, this device is selected for compact, high-efficiency boost conversion where output disconnect, low quiescent current (<0.5μA shutdown), and automotive-grade reliability are mandatory.

Technical Context

The MPQ3410DJ-LF-P employs current-mode control with a 1.2V internal reference and error amplifier to regulate output voltage via external resistive feedback. Its 550kHz oscillator drives a PWM comparator that compares sensed inductor current against the error voltage, enabling fast transient response and stable loop behavior across load and line variations.

It integrates both high-side P-channel and low-side N-channel MOSFETs in a single TSOT23-5 package, enabling synchronous rectification without external diodes. The EN pin controls zero-current shutdown, while FB pin enables precise output setting (e.g., 3.3V or 5V) using a 100kΩ R2 and calculated R1 divider.

Key Specifications

Pinout & Package

MPQ3410DJ-LF-P is housed in a RoHS-compliant, moisture-sensitive level 1 TSOT23-5 package (0.95mm pitch, 2.9mm × 1.6mm footprint), optimized for high-density PCB layouts and automotive thermal cycling.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-up converter applications.

Compared with TPS610992DRCR and MAX17222ETA+, MPQ3410DJ-LF-P uniquely combines AEC-Q100 Grade 1, output disconnect, and synchronous rectification in TSOT23-5-making it the only choice for space-constrained automotive modules needing guaranteed shutdown isolation and thermal robustness.

Availability

MPQ3410DJ-LF-P is available at Aetrix Electronics and suitable for automotive body electronics, portable medical instrumentation, industrial handheld scanners, and digital imaging systems requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for MPQ3410DJ-LF-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 analog and power ICs, with design centers across Asia and North America and global manufacturing partnerships.

The MPQ3410 belongs to MPS's automotive-qualified boost converter product line, engineered specifically for reliable, compact, and efficient voltage step-up in safety-critical and thermally demanding environments.

FAQ

What is the minimum input voltage required to start regulation?

The MPQ3410DJ-LF-P starts regulation when input voltage reaches 1.6V (typical) at 25°C, with a guaranteed startup threshold of 1.4V across –40°C to +125°C. Below this, the internal UVLO circuit prevents switching to protect downstream components.

Does MPQ3410DJ-LF-P require an external Schottky diode?

No external Schottky diode is required for outputs ≤4V. For outputs ≥4V (e.g., 5V), a 0.5A/20V Schottky diode (e.g., B130) is recommended across SW and OUT to clamp voltage spikes and prevent P-MOSFET breakdown during light-load discontinuous conduction mode.

How is output voltage set, and what resistor tolerance is recommended?

Output voltage is set using a resistive divider from VOUT to FB, where FB is regulated to 1.19V. With R2 = 100kΩ, R1 = (VOUT/1.19 – 1) × 100kΩ. Use 1% metal-film or thin-film resistors to maintain output accuracy within ±2% over temperature and line regulation.

Can MPQ3410DJ-LF-P operate with input voltage higher than output voltage?

Yes - the MPQ3410DJ-LF-P functions as a regulated pass-through when VIN ≥ VOUT (e.g., VIN = 4.5V, VOUT = 3.3V). In this mode, the P-MOSFET remains on, delivering low-dropout operation with typical R_ONHS = 530mΩ, minimizing conduction loss.

What is the thermal performance limitation in a standard 4-layer PCB?

On a JEDEC-standard 4-layer board, θ_JA = 220°C/W. At ambient 85°C and 1.3A load, junction temperature rises ~110°C above ambient, reaching ~195°C - exceeding the 125°C max operating limit. Derating or adding copper pour is required for full-load operation above 60°C ambient.

Is the EN pin compatible with 1.8V logic microcontrollers?

Yes - EN logic high threshold is 1.05V minimum at VIN = 1.8V, ensuring reliable turn-on from 1.8V GPIO. The internal 1MΩ pull-down guarantees safe shutdown if EN is left floating, eliminating need for external pull-down resistors.

What is the recommended output capacitor value for 5V/400mA operation?

For 5V/400mA operation at 550kHz, a single 10µF X5R/X7R ceramic capacitor (0805 or larger) is recommended. Larger values (up to 22µF) reduce output ripple and improve transient response, especially under pulsed loads like camera flash.