The device includes a PWM controller, a pair of MOSFET drivers with internal bootstrap diodes, channel-current balance and comprehensive protection features in the compact, low pin-count U-QFN4040-24 package. Designed for 12V systems, it delivers an output current as high as 60A and harnesses external compensation to minimise output voltage ripple and optimise transient response.
Accurate phase current balance is maintained through lossless RDS(ON) current sensing, while inductor current sampling ensures a dependable current limit. To help maximise efficiency, the AP3598A offers a power-save mode, which enables it to switch automatically between dual- and single-phase operation when subject to light loading.
For safe high-current operation, the controller provides a full complement of protection functions including over-current, over-temperature, and under- and over-voltage protection. Other features include adjustable soft-start, adjustable operating frequency selection, and a power-good indicator and enable control.
The AP3598A dual-phase PWM-VID buck controller from Diodes Incorporated is priced at $0.7USD each in 1k quantities.