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The ISL8501 is a high-performance, triple output controllerthat provides a single, high frequency power soluTIon for avariety of point of load applicaTIons. The ISL8501 integratesa 1A standard buck PWM controller and switching MOSFETwith two 500mA LDOs.The PWM controller in the ISL8501 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.The standard buck input voltage range supports a fixed 5Vor variable 6V to 25V range. The PWM regulator switches ata fixed frequency of 500kHz and uTIlizes simple voltagemode control with input voltage feed forward to provideflexibility in component selection and minimize solution size.Protection features include overcurrent, undervoltage, andthermal overload protection integrated into the IC. TheISL8501 power good signal output indicates loss ofregulation on the PWM output.The ISL8501 features two adjustable LDO regulators usinginternal PMOS transistors as pass devices. Separate enablepins (EN_LDO1, EN_LDO2) control each LDO output. Asingle power good signal output indicates loss of regulationon either of the two LDO outputs. Independent overcurrentand thermal fault shutdown monitors are integrated into theLDO section.ISL8501 is available in a small 4mmx4mm Quad Flat No- Lead (QFN) package.
