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Datasheet Intersil ISL78268ARZ-T7A

Manufacturer:Intersil
Series:ISL78268
Part Number:ISL78268ARZ-T7A

55 V Synchronous Buck Controller with Integrated 3 A Driver

Datasheets

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    DATASHEET 55V Synchronous Buck Controller with Integrated 3A Driver
    ISL78268
    The ISL78268 is a grade 1, automotive, synchronous buck controller with integrated high/low side MOSFET drivers. It supports a wide operating input voltage range of 5V to 55V and up to 60V at VIN when not switching. The integrated driver offers adaptive dead-time control and is capable of supplying up to 2A sourcing and 3A sinking current, allowing the ISL78268 to support power stages designed for a wide range of loads, from under 1A to over 25A. ISL78268's fully synchronous architecture enables power conversion with very high efficiency and improved thermal performance over standard buck converters. The ISL78268 also offers diode emulation mode for improved light load efficiency. While ISL78268 is a peak current mode PWM controller, it also includes a dedicated average output current modulation loop, which achieves constant output current limiting for applications such as battery charging, super-cap charging, and temperature control systems where a constant current must be provided. The ISL78268 supports switching frequencies from 50kHz to 1.1MHz allowing the user the flexibility to trade-off switching frequency and efficiency against the size of external components. The ISL78268 offers comprehensive protection features. It includes robust current protection with cycle-by-cycle peak current limiting, average current limiting, and a selectable hiccup or latch-off fault responses. In addition, it offers protection against over-temperature, as well as input and output overvoltages. Features Wide input range 5V to 55V (switching); withstand 60V (non-switching) Integrated 2A sourcing, 3A sinking MOSFET drivers Constant current regulation/limiting - dedicated average current control loop Adjustable switching frequency or external synchronization from 50kHz up to 1.1MHz Low shutdown current, IQ <1µA Peak current mode control with adjustable slope compensation Selectable diode emulation mode for high efficiency at light load Input and output OVP, cycle-by-cycle current limiting, average current OCP, OTP Selectable hiccup or latch-off fault responses Pb-free 24 Ld 4x4 QFN package (RoHS compliant) AEC Q100 qualified Applications Automotive power Telecom and industrial power supplies General purpose power Supercap charging Related Literature AN1946, "ISL78268EVAL1Z Evaluation Board User Guide" VIN VIN EN_IC PVCC EN VCC ISEN1P ISEN1N PVCC IMON/DE PVCC 100 95 90 EFFICIENCY (%) 85 80 75 70 65 60
    VCC BOOT FSYNC PLL_COMP UG VIN = 24V VIN = 36V VIN = 55V VIN = 15V ISL78268 PH LG VOUT SLOPE COMP ...

Other Names: ISL78268ARZT7A, ISL78268ARZ T7A

Docket:
DATASHEET 55V Synchronous Buck Controller with Integrated 3A Driver
ISL78268
The ISL78268 is a grade 1, automotive, synchronous buck controller with integrated high/low side MOSFET drivers. It supports a wide operating input voltage range of 5V to 55V and up to 60V at VIN when not switching. The integrated driver offers adaptive dead-time control and is capable of supplying up to 2A sourcing and 3A sinking current, allowing the ISL78268 to support power stages designed for a wide range of loads, from under 1A to over 25A. ISL78268's fully synchronous architecture enables power conversion with very high efficiency and improved thermal performance over standard buck converters. The ISL78268 also offers diode emulation mode for improved light load efficiency. While ISL78268 is a peak current mode PWM controller, it also includes a dedicated average output current modulation loop, which achieves constant output current limiting for applications such as battery charging, super-cap charging, and temperature cont...

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