ISL8120CRZ Intersil, ISL8120CRZ Datasheet - Page 6

• Manufacturer Part Number: ISL8120CRZ
• Description: IC CTRLR PWM 2PHASE W/DVR 32-QFN
• Manufacturer: Intersil

Specifications of ISL8120CRZ

• Pwm Type: Voltage Mode
• Number Of Outputs: 2
• Frequency - Max: 1.5MHz
• Duty Cycle: 90%
• Voltage - Supply: 3 V ~ 22 V
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
• Frequency-max: 1.5MHz
• Rohs Compliant: YES
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Typical Application II (Double Data Rate I or II)
(Or tie REFIN pin to VMON1 pin)
(See notes below)
Note 1: Set the upper resistor to be a little higher than R*(VDDQ/0.6 - 1) will set the final REFIN voltage (stead state voltage after soft-start) derived from
Note 2: Another way to set REFIN voltage is to connect VMON1 directly to REFIN pin.
R*(VTT/0.6-1)
+3.3 TO +22V
The other way is to add more delay at EN/FF1 pin to have Channel 2 tracking VDDQ (check the DDR section for more details).
the VDDQ to be a little higher than internal 0.6V reference. In this way, the VTT final voltage will use the internal 0.6V reference after soft-start.
R
R
SET
R
FS
V
C
DDQ
F3
VIN
PGOOD
ISHARE
FSYNC
ISET
1nF
VIN
CLKOUT/REFIN
6
C
F2
ISL8120
GND
VCC
R
CC
PVCC
L
IN
BOOT1
UGATE1
PHASE1
LGATE1
ISEN1A
ISEN1B
COMP1
FB1
VMON1
VSEN1+
VSEN1-
BOOT2
UGATE2
PHASE2
LGATE2
ISEN2A
ISEN2B
COMP2
FB2
VMON2
VSEN2+
VSEN2-
C
F1
ISL8120
Z
2k
Z
COMP1
COMP1
VIN_F
Ω
2k
Ω
Z
Z
FB1
V
FB1
DDQ
C
Q1
Q2
Q3
Q4
HFIN
Or VIN_F
R
R
OS1
OS2
C
C
R
BOOT1
BOOT2
ISEN1
R
ISEN2
L
L
C
OUT1
OUT2
R
R
BIN
FB1
FB2
C
SEN2
C
SEN1
10
10
Ω
Ω
C
C
OUT1
OUT2
2.5V
1.8V
1.25V
0.9V
0.9V
V
V
V
V
10
10
SENSE1-
(DDR I)
SENSE1+
(DDR II)
SENSE2+
SENSE2-
(DDR II)
(DDR I)
Ω
Ω
March 20, 2009
( V
V
V
DDQ
TT
FN6641.0
DDQ
/2)