company blog about MPQ9840 DC-DC Chip: A High-Efficiency Synchronous Buck Converter Designed for Automotive and Industrial Electronics

MPQ9840 Automotive-Grade Buck Converter Product Introduction — Mingjiada Electronics Offers In-Stock Supply

I. Product Overview

The MPQ9840 is a high-frequency, synchronous-rectification buck switching regulator developed by MPS (MPS Systems) that features an integrated power MOSFET and is housed in a compact QFN-16 (3mm × 4mm) package. This chip has obtained AEC-Q100 Grade 1 certification and is suitable for harsh environments such as automotive and industrial applications.

II. Key Parameters and Features

Input Voltage Range: 3.3V ~ 36V

Maximum Output Current: 3.5A

Switching Frequency: 350kHz ~ 2.5MHz (programmable/synchronized to external clock)

Quiescent Current (Sleep Mode): 14μA

Shutdown current: 2 μA

Integrated MOSFETs: High-side 125 mΩ / Low-side 55 mΩ

Minimum on-time: 80 ns

Operating temperature range: -40°C to +125°C

Package: QFN-16 (3 mm × 4 mm)

Key features include: peak current-mode control, selectable forced CCM and AAM modes (high efficiency at light loads), external soft-start, power good (PG) indication, hiccup overcurrent protection, short-circuit protection, and over-temperature shutdown.

III. Major Application Scenarios

With its wide input voltage range, high efficiency, and compact package, the MPQ9840 is particularly well-suited for the following application areas:

Automotive electronic systems: In-vehicle infotainment systems, ADAS sensor power supplies, body control modules, millimeter-wave radar, etc.

Industrial power supply systems: Factory automation equipment, PLC control, servo drive auxiliary power supplies

Battery-powered devices: Portable instruments, IoT terminals, handheld devices

IV. Mingjiada Electronics’ Supply Advantages

Established in 1996, Shenzhen Mingjiada Electronics Co., Ltd. is an independent distributor of international electronic components, with warehouses and service centers in Shenzhen, Hong Kong, and Guangzhou. The company supplies the MPQ9840 series, supports spot sales, and provides one-stop order fulfillment services. Application areas include automotive electronics, industrial control, power management, communications equipment, and medical instruments.

Purchasing Inquiries:

Phone: +86 13410018555

Email: sales@hkmjd.com

Address: Rooms 1239–1241, Building B, Guoli Tower, Phase II of New Asia, Zhenzhong Road, Futian District, Shenzhen