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The ISL8510 is a high-performance, dual output controllerthat provides a single, high frequency power soluTIon for avariety of point of load applicaTIons. The ISL8510 integratesa 1A standard buck PWM controller and switching MOSFETwith one 500mA LDO.The PWM controller in the ISL8510 drives an internalswitching N-Channel power MOSFET and requires anexternal Schottky diode to generate an output voltage from0.6V to 20V. The integrated power switch is opTImized forexcellent thermal performance up to 1A of output current. Thestandard buck input voltage range supports a fixed 5V orvariable 5.5V to 25V range. The PWM regulator switches at afixed frequency of 500kHz and uTIlizes simple voltage modecontrol with input voltage feed forward to provide flexibility incomponent selection and minimize solution size. Protectionfeatures include overcurrent, undervoltage, and thermaloverload protection integrated into the IC. The ISL8510power-good signal output indicates loss of regulation on thePWM output.The ISL8510 features one adjustable LDO regulator usinginternal PMOS transistors as pass devices. The enable pin(EN_LDO) controls the LDO output. A single power-goodsignal output indicates loss of regulation on the LDO output.Independent overcurrent and thermal fault shutdown monitorsare integrated into the “LDO Regulator Capacitor Selection”on page 16.The ISL8510 is available in a small 4mmx4mm Quad Flat No Lead (QFN) package.
