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Introduction, Characteristics, and Applications of Monolithic Power System (MPS) MPQ4341/4341J Synchronous Buck Converters

2/16/2024 9:00:00 AM

Summary: 36V, 5A configurable frequency device with built-in high/low-side power mosfet.

MPS MPQ4341/4341J

The Monolithic Power System (MPS) MPQ4341/4341J synchronous buck converters are 36V, 5A configurable frequency (350kHz to 2.5MHz) devices with integrated high-side and low-side power mosfets (HS-FET and LS-FET respectively) . The converters deliver up to 5A of high-efficiency output current (IOUT) with fixed-frequency zero-delay PWM (ZDP) control for near-optimal transient response. 3.3V to 36V wide input voltage range, 42V load dump support, adaptable to various buck applications in automotive input environments. The MPQ4341/4341J converters feature 1µA shutdown current (ISD), allowing the device to be used in battery-powered applications.

High power conversion efficiency over a wide load range can be achieved by reducing the switching frequency (fSW) under light load conditions to reduce switching and gate driver losses. The PG (open-drain power good) signal indicates whether the output voltage (VOUT) is between 94% ~ 106% of the nominal voltage range. Thermal shutdown provides reliable fault-tolerant operation. High duty cycle and low dropout (LDO) modes provide automotive cold crank conditions.

The MPQ4341 is available in a QFN-17 (3mm x 4mm) package, and the MPQ4341J is available in a QFN-19 (3mm x 4mm) package. Both versions are AEC-Q100 certified.


characteristic

  • Designed specifically for automotive applications

    • Withstands 42V load dump

    • Supports up to 3.1V cold crank

    • LDO (Low-dropout) mode

    • Up to 5A continuous output current

    • Can work continuously up to 36V

    • Zero delay PWM control

    • multi-stage capabilities

    • At least 20 seconds on time

    • Junction temperature operating range -40℃~ +150℃

    • AEC-Q100 Level 1

  • Extend battery life

    • 1μA low shutdown current

    • 3μA sleep mode quiescent current

    • Advanced Asynchronous Modulation (AAM) mode improves efficiency at light loads

  • Improved thermal performance with internal 60 milliohm high-side MOSFET and 35 milliohm low-side MOSFET (HS-FET and LS-FET respectively)

  • Optimized for EMC/EMI

    • Configurable switching frequency from 350kHz to 2.5MHz

    • Symmetrical V(IN) pin

    • Frequency spread spectrum (FSS) modulation

    • CISPR25 Level 5 Standard

    • MeshConnect flip chip packaging

  • 1V, 1.1V, 1.8V, 2.5V, 3V, 3.3V, 3.8V, 5V fixed output options

  • Can be synchronized with external clock

  • Synchronized clock output

  • Power Good (PG) output

  • External soft start

  • Hiccup Overcurrent Protection (OCP)

  • Available in packaging, all with wettable flanks

    • QFN-17 (3mm x 4mm) package for MPQ4340

    • QFN-19 (3mm × 4mm) package for MPQ4340J


app

  • car cluster

  • Automotive Infotainment

  • Advanced driver assistance system (ADAS)

  • Industrial power systems

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