NCP81038 Datasheet - ON Semiconductor

NCP81038 Synchronous Buck Controller

Pin No. Symbol Description 1, 21 GH1, GH2 Gate driver output of the top N *channel MOSFET. 2, 20 BST1, BST2 Top gate driver input supply, a bootstrap capacitor connection between SWNx and this pin. 3, 19 SWN1, SWN2 Switch node between the top MOSFET and bottom MOSFET. 4 GL2 Gate .

NCP81038 Synchronous Buck Controller with Auto Power Saving Mode and Built-In LDO NCP81038 is a dual synchronous buck controller that is optimized for converting the battery voltage or adaptor voltage into multiple power rails required in desktop and notebook system. NCP81038 consists of two buck switching controllers with fixed 5.0 V output on channel 2, 3.3 V on channel 1 and two on board LDOs with three outputs: 5 V / 60 mA and 3.3 V or 12 V / 10 mA. NCP81038 supports high efficiency.

NCP81038 Features

* Wide Input Voltage Range: from 5.5 V to 28 V

* Built

* in 5 V / 60 mA LDO

* Built

* in selectable 3.3 V or 12 V / 10 mA LDO

* Three Selectable Fixed Frequency 300 KHz, 400 KHz or 600 KHz

* 180 Interleaved Operation Between the Two Channels in Con

NCP81038-ONSemiconductor.pdf