ZL1505ALNFT

ZL1505ALNFT Features

• High-speed, high-current drivers for synchronous N-channelMOSFETs • Adaptive dead-time control optimizes efficiency when usedwith Digital-DC controllers • Integrated 30V bootstrap Schottky diode • Capable of driving 40A per phase • Supports switching frequency up to 1.4MHz- >4A source, >5A sink low-side driver- >3A source/sink high-side driver- <10ns rise/fall times, low propagation delay • Adjustable gate drive strength optimizes efficiency fordifferent VIN, VOUT, IOUT, FSW and MOSFET combinations • Internal non-overlap watchdog prevents shoot-throughcurrents

ZL1505ALNFT Applications*(see page 12)

• High efficiency, high-current DC/DC buck converters withdigital control and PMBus™ • Multi-phase digital DC/DC converters with phaseadding/dropping • Power train modules • Synchronous rectification for secondary side isolated powerconverters

ZL1505ALNFT Pin Descriptions

PIN NUMBERPIN NAMETYPE (Note 3)DESCRIPTION1HSELIHigh-side gate drive current selector. Connect to BST for maximum gate drive current;connect to SW for 50% of maximum gate drive current.2GHOOutput of high-side gate driver. Connect to the gate of high-side FET.3SWI/OPhase node. Return path for high-side driver. Connect to source of high-side FET and drainof low-side FET.4PWMHIHigh-side PWM control input.5PWMLILow-side PWM control input.6LSELILow-side gate drive current selector. Connect to VDD for maximum gate drive current;connect to GND for 50% of maximum gate drive current.7GNDPWRGround. All signals return to this pin.8GLOOutput of low-side gate driver. Connect to the gate of low-side FET.9VDDPWRGate drive bias supply. Connect a high-quality bypass capacitor from this pin to GND.10BSTPWRBootstrap supply. Connect external capacitor to SW node.EPADGNDPWRGround.NOTE:3. I = Input, O = Output, PWR = Power OR Ground.