High Power Step-Down Synchronous DC/DC Controller

The APW7057 is a 300kHz constant frequency voltage mode synchronous switching controller that drives exter- nal N-Channel MOSFETs When the input supply drops close to output, the upper MOSFET remains on, achiev- ing 100% duty cycle. Internal loop compensation is opti- mized for fast transient response, eliminating external compensation network. The precision 0.8V reference makes this part suitable for a wide variety of low voltage applications. Soft-start is internally set to 2ms, limiting the input in-rush current and preventing the output from overshoot during powering up. The APW7057 has over current and short circui t protections. Over current protection is achieved by moni- toring the voltage drop across the high side MOSFET eliminating the need for a current sensing resistor and short circuit condition is detected through the FB pin. If either fault conditions occur, the APW7057 would initiate the soft-start cycle. After three cycles and if the fault condi- tion persists, the controller will be shut down. To restart the controller, either recycle the V supply or momen- CC tarily pull the OSCSET pin below 1.25V. The APW7057 CAN be shutdown by pulling the OCSET pin below 1.25V. In shutdown, both Gate drive signals will be low. The controller is available in a small SOP-8 package. By Anpec Electronics Corporation
APW7057 's PackagesAPW7057 's pdf datasheet



APW7057 Pinout, Pinouts
APW7057 pinout,Pin out
This is one package pinout of APW7057,If you need more pinouts please download APW7057's pdf datasheet.

APW7057 Application circuits
APW7057 circuits
This is one application circuit of APW7057,If you need more circuits,please download APW7057's pdf datasheet.


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