AT8853Z Single Channel Synchronous Buck PWM Controller
General Description
AT8853Z is a single channel output synchronous PWM controller IC which drives dual N-channel
MOSFETs.
AT8853Z is provided in full functions for various applications including adjustable soft start ,free-run
150kHz and also could be adjust by RT pin; the part is with design in 12V+12V boot strapped driver which is
capable to drive MOS with up to 25Amp output current.
The part features with full protection functions include POR, OCP, UVP, OVP. The Power on reset circuit
monitors the VCC and OCSET voltage to make sure the supply voltage exceeds the threshold voltage while controller start running.
The Over current Protection monitors the current drop across the high side MOS`s Rdson ,while the output current reaches the trip point, the controller will stop switching. Under voltage Protection and Over voltage protection monitor the FB pin for Vout short circuit(to gnd or VIn) protection when output voltage is under 50% or over 120% of normal output voltage.
The devices is available in SOP-14L package and require few external devices for operation.
AT8853Z Single Channel Synchronous Buck PWM Controller