Diodes Incorporated has announced yet another addition to its family of automotive-compatible DC-DC converters. DIODES' AP64060Q is a 600mA synchronous buck converter device with an input voltage range covering 4.5 to 40V.
It incorporates a 600mΩ top-side power MOSFET plus a 300mΩ bottom-side power MOSFET so that high-efficiency step-down conversion (reaching 90%) can be provided and with minimal space on the PCB board.
The AP64060Q is targeted for use in automotive engines, infotainment systems and instrumentation clusters, as well as vehicle exterior lighting.
The AP64060Q has a low quiescent current (IQ), typically just 90μA, which translates into higher light load efficiency. Thanks to the fast switching frequencies this device supports (2 MHz), smaller inductors and capacitors can be selected. Its synchronous rectification eliminates the need for an external Schottky diode, and the use of a peak current mode control and integrated loop compensation network further reduces the overall component count.
The proprietary gate driver scheme employed in the AP64060Q alleviates switching node ringing without affecting MOSFET on and off times. This attenuates high-frequency radiated electromagnetic interference noise caused by MOSFET switching.
The AP64060Q has an operating ambient temperature range of -40° to +125° C. Protection features include overvoltage protection (OVP), undervoltage lockout (UVLO), and thermal shutdown. This device is supplied in a compact TSOT26 package.