ISL6561CRZ Intersil, ISL6561CRZ Datasheet - Page 17

• Manufacturer Part Number: ISL6561CRZ
• Description: IC CTRLR PWM MULTIPHASE 40-QFN
• Manufacturer: Intersil

Specifications of ISL6561CRZ

• Applications: Controller, Intel VR10X
• Voltage - Input: 3 ~ 12 V
• Number Of Outputs: 4
• Voltage - Output: 0.84 ~ 1.6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 40-VFQFN, 40-VFQFPN
• Input Voltage: 12V
• Output Voltage: 1.65V
• Supply Voltage Range: 4.75V To 5.25V
• Digital Ic Case Style: QFN
• No. Of Pins: 40
• Operating Temperature Range: 0°C To +70°C
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Control Mode: Voltage
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

tracks the lower MOSFET or inductor temperature. The
value of K
is typically between 75% and100%. K
is the
T
TC
temperature dependant transconductance of internal
compensation circuit. Its vaule is designed as 1µA/V/°C. The
temperature coefficient of MOSFET r
or Inductor
DS(ON)
DCR is given by
. This is the ratio of the change in
resistance and the change in temperature. Resistance is
normalized to the value at 25°C and the value of
is
typically between 0.35%/°C and 0.50%/°C. For copper
wound inductors,
is 0.39%/°C.
According to Equation 13, a voltage regulator with 80%
thermal coupling coefficient between the controller and lower
MOSFET and 0.4%/°C temperature coefficient of MOSFET
r
requires a 5kΩ TCOMP resistor.
DS(ON)
Initialization
Prior to converter initialization, proper conditions must exist
on the enable inputs and VCC. When the conditions are met,
the controller begins soft-star
17
FN9098.5
May 12, 2005