ISL8273M Datasheet, PDF (5/55 Pages) Intersil Corporation – 80A Single Channel Digital PMBus Step-Down Power Module

ISL8273M
Pin Descriptions (Continued)
PIN
NUMBER
L2
L3
P11
L14
M1
M5, M17, N5
M10
M13
N6, N16
R8, R17
PIN
NAME
VR
SWD1
SWD2
VR5
VCC
PGND
VR55
VR6
VDRV
VDRV1
TYPE
DESCRIPTION
PWR Internal LDO bias pin. Tie VR to VR55 directly with a short loop trace. Not recommended to power external circuit.
PWR Switching node driving pins. Directly connect to the SW1 and SW2 pads with short loop wires.
PWR Internal 5V reference used to power internal circuitry. Place a 10µF decoupling capacitor for this pin. Maximum
external loading current is 5mA.
PWR Internal LDO output. Connect VCC to VDRV for internal LDO driving.
PWR Power grounds. Using multiple vias to connect the PGND pins to the internal PGND layer.
PWR Internal 5.5V bias voltage for internal LDO use only. Tie VR55 pin directly to the VR pin. Not recommended to power
external circuit.
PWR Internal 6V reference used to power internal circuitry. Place a 10µF decoupling capacitor for this pin. Not
recommended to power external circuit.
PWR Power supply for internal FET drivers. Connect a 10μF bypass capacitor to each of these pins. These pins can be
driven by the internal LDO through VCC pin or by the external power supply directly. Keep the driving voltage between
4.5V and 5.5V. For 5V input application, use external supply or connect this pin to VIN.
I Bias pin of the internal FET drivers. Always tie to VDRV.
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FN8704.2
March 16, 2016