降壓轉換IC

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.

General Description
AT8852Z is a dual channel output synchronous PWM controller IC which drives dual N-channel
MOSFETs in 180 degree phase shift and operated base on ATK patented Fsw Green Mode function to achieve light load high efficiency performance.
AT8852Z is provided in full functions for various applications including adjustable soft start ,free-run
150kHz ; the part is with design od 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-16L package and require few external devices for operation.

General Description
AT2003S is a wide input voltage, high efficiency stepdown DC/DC converter that operates in either CV (ConstantOutput Voltage) mode or CC (Constant OutputCurrent) mode.
AT2003S provides up to 3A output current at 120kHz switching frequency ,and the CC level can be
adjusted by changing external sensing resister.
The AT2003S provides full protection functions, thermal shutdown is to prevent over temperature operating from damage; cycle by cycle current limit is against over current operating of the switch; and over voltage protection(OVP) that can avoid high Vout voltage to damage circuit and capacitor.
The devices is available in PSOP8-8L package and require very few external devices for operation.

General Description
AT2001 is a wide input voltage, high efficiency stepdown DC/DC converter that operates in either CV (Constant Output Voltage) mode or CC (Constant Output Current) mode.
AT2001 provides up to 1.3A output current at 135kHz switching frequency without additional transistor.
Internal sensorless CC control eliminates the expensive, high accuracy current sense resistor, and making it
ideal for battery charging applications and adaptors with accurate current limit.
AT2001 achieves higher efficiency than traditional constant current switching regulators by eliminating the external current sense resister associated power loss.
Regarding protected function, thermal shutdown is to prevent over temperature operating from damage; cycle by cycle current limit is against over current operating of the switch; and over voltage protection (OVP) that can avoid high Vout voltage to damage circuit and capacitor.
The devices is available in SOT23-6L package and require very few external devices for operation.