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ISL6265CHRTZ Datasheet(PDF) 5 Page - Renesas Technology Corp |
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ISL6265CHRTZ Datasheet(HTML) 5 Page - Renesas Technology Corp |
5 / 27 page ISL6265C FN6976 Rev 2.00 Page 5 of 27 January 11, 2013 36 BOOT_NB This pin is the upper gate drive supply voltage for the Northbridge controller. Connect an appropriately sized ceramic bootstrap capacitor between the BOOT_NB and PHASE_NB pins. An internal bootstrap diode connected to the PVCC pin provides the necessary bootstrap charge. 37 UGATE_NB Upper MOSFET gate signal from Northbridge controller. 38 PHASE_NB Switch node of the Northbridge controller. This pin should connect to the source of the Northbridge channel upper MOSFET(s). 39 LGATE_NB Lower MOSFET gate signal from Northbridge controller. 40 PGND_NB The return path of the Northbridge controller lower gate driver. Connect this pin to the source of the lower MOSFET(s). 41 OCSET_NB Overcurrent protection selection input for the Northbridge controller. A resistor from this pin to PHASE_NB sets the OC trip point. 43, 42 VSEN_NB, RTN_NB Remote Northbridge voltage sense input and return. Connect isolated traces from these pins to the Northbridge sense points of the processor. 44 FSET_NB A resistor from this pin to GND programs the switching frequency of the Northbridge controller (for example, 22.1k ~ 260kHz). 45 COMP_NB This pin is the output of the Northbridge controller error amplifier. 46 FB_NB This pin is the output voltage feedback to the inverting input of the Northbridge controller error amplifier. 47 VCC The bias supply for the IC’s control circuitry. Connect this pin to a +5V supply and decouple using a quality 0.1µF ceramic capacitor. 48 VIN Battery supply voltage. It is used for input voltage feed-forward to improve the input line transient performance. - GND The bias and reference ground for the IC. The GND connection for the ISL6265C is through the thermal pad on the bottom of the package. Pin Descriptions (Continued) PIN(s) SYMBOL(s) DESCRIPTION |
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