AS3729B-BWLM ams

AS3729B 8A Power Stage The AS3729B is a companion power stage, intended to be used General Description with AS372x products. It cannot be used without a DC/DC controller. It contains the power FETs for 2 phases and is capable to handle output currents of 4A per phase. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of AS3729B, 8A Power Stage are listed below: Figure 1: Added Value of Using AS3729B Benefits Features Support for single or dual phase operation 2 phases with separate control input Separate power NMOS & PMOS for 4A per phase 2 x 4A output stages are running up to Separate coil current feedback per phase 2.7MHz Stand-Alone zero-crossing operation Over-temperature protection Integrated temperature monitoring Cost effective, small package WL-CSP16: 1.615mm x 1.615mm, 0.4mm pitch Applications This device is a high current dual-phase DC/DC and ideal for: Mobile phones Tablets Notebooks ams Datasheet Page 1 v1-03 2015-Sep-28 Document FeedbackAS37 29 B Gen e ra l De s c rip t ion Block Diagram The functional blocks of this device are shown below: Figure 2: AS3729B Block Diagram VSUP VSUP clk TEMP Pgate PWM PWM Logic Isense CTRL2 ov curr LX1 1uH CTRL1 CTRL1 47uF Ngate Zcomp Vov current Logic RCSNS Current sense S ramp PVSS VRef FB error ota VSS AS3729B Block Diagram: This figure shows the block diagram of the DC/DC controller inside the Main PMIC and the AS3729B Power Stage with all relevant system components. Page 2 ams Datasheet Document Feedback v1-03 2015-Sep-28