5.5V, 4A, Low Iq Synchronous Buck Converter with Versatile I2C Interface from Diodes

Diodes Incorporated introduces the AP61406Q, a new 5.5V, 4A member with I²C interface of its low quiescent current (Iq), automotive-compliant synchronous buck converters. The I²C interface allows the programming of various parameters, enabling it to meet the growing demand for compact design and high efficiency in various automotive point-of-load (POL) applications, including infotainment, instrument clusters, telematics, and advanced driver assistance systems (ADAS).

A key advantage of the AP61406Q is its I²C 3.0-compatible serial interface, which supports SCL clock rates up to 3.4MHz. This interface enables programmability for various parameters, including PFM/PWM modes, frequencies (1MHz, 1.5MHz, 2MHz, 2.5MHz), and output currents (1A/2A/3A/4A). The device also provides 20mV increment VOUT adjustability and fault status reports.

Optimized for high-power-density automotive POL applications, the AP61406Q is available in a W-QFN1520-8/SWP (Type UX) package, enabling it to operate at high ambient temperatures. The device also features a proprietary gate driver scheme that effectively resists switching node ringing without compromising MOSFET turn-on and turn-off times, thereby reducing high-frequency radiated EMI noise (more info).

robenek@dps-az.cz