Microchip 5-Channel Step-Down Buck Converter 1 A 24V 575 kHz TDFN 8-Pin MCP16311T-E/MNY

Microchip MCP16311T-E/MNY is a highly efficient, synchronous step-down DC-DC converter designed for regulating power in electronic systems requiring up to 1 A output current. This 5-channel buck converter operates at a fixed switching frequency of 575 kHz and can handle input voltages from 4.4 V up to 30 V, delivering adjustable output voltages between 2.0 V and 24 V. The device integrates both high-side and low-side N-channel MOSFET switches to maximize efficiency up to 95%, ideal for industrial, automotive, laboratory, and commercial electronics power management applications.

The MCP16311 provides robust internal protections, including cycle-by-cycle peak current limiting, under-voltage lockout (UVLO), and thermal shutdown to ensure reliable operation under harsh conditions. It features low quiescent current (44 µA in PFM mode) and extremely low shutdown current (3 µA typical), enabling energy-efficient designs. The integrated internal compensation and soft-start functionality minimize output voltage overshoot and enhance transient response.

Its compact 8-pin TDFN surface mount package measures only 3 mm by 2 mm by 0.75 mm in height, supporting space-constrained designs in automotive and industrial environments. The device is qualified to AEC-Q100 Rev. G, Grade 1 standards, making it suitable for automotive electronic control units (ECUs) and other temperature-critical applications with an operating temperature range from -40°C to 125°C.

Adjustable step-down output voltage from 2.0 V to 24 V. Fixed 575 kHz switching frequency synchronous buck design. High efficiency up to 95% for reduced power loss. Supports input voltages from 4.4 V to 30 V. Low current consumption with 44 µA quiescent current and 3 µA shutdown current.

Integrated over-temperature and under-voltage lockout protections. Peak current mode control and internal compensation for stable regulation. Small footprint TDFN 8-pin package ideal for dense PCB layouts. Automotive-grade qualification to AEC-Q100 Grade 1 standard.

This buck converter is suitable for industrial controls, automotive electronics, communication devices, and other power-sensitive applications requiring reliable DC voltage regulation. The compact form factor combined with efficient power conversion makes it a versatile choice for engineers designing embedded power systems.

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