ISL62381 Datasheet, PDF (7/23 Pages) Intersil Corporation – High-Efficiency, Quad or Triple-Output System Power Supply Controller for Notebook Computers

ISL62381, ISL62382, ISL62383
Typical Application Circuits The below typical application circuits generate the 1.05V/15A and 1.5V/15A main supplies in a
notebook computer. The input supply (VBAT) range is 5.5V to 25V
VBAT
6x10µF
1 .0 5 V
0.22µF
2.2µH ^IRF7821x2
330µFx2
590
1800pF
36.5K
0.022µF 16.2k
IRF7832x2
16.2k
48.7k
3 .3 V
4.7µF
17.4k
5V
10K
4.7µF
10
*ISL62381, ISL62382 ONLY
1µF 1µF
B O O T1
V IN
B O O T2
0.22µF
UGATE1
PHASE1
UGATE2
PHASE2
LGATE1
LGATE2
ISL62381, ISL62382, ISL62383
OCSET1
IS E N 1
VOUT1
OCSET2
IS E N 2
VOUT2
IRF7821x2 2.2µH
16.2k 0.022µF
IRF7832x2
16.2k
1 .5 V
330µFx2
590
36.5k _1800pF
FB1
LDO3*
LDO3FB*
LDO5
VCC1
VCC2
PGND
GND
FB2
L D O 3IN *
PGOOD1
VBAT
100k
PGOOD2
EN1
EN2
LD O 3EN *
FCCM
FSET1
FSET2
14k
100k
17.4k
0.01µF
24.3k
LDO5
0.01µF
FIGURE 3. TYPICAL APPLICATION CIRCUIT WITH INDUCTOR DCR CURRENT SENSE
VBAT
6x10µF
1 .0 5 V
330µFx2
0.001
2k
IRF7821x2
0.22µF
2.2µH
IRF7832x2
2k
590
1800pF ^36.5k
48.7k
3 .3 V
4.7µF
17.4k
5 V 10k
4.7µF
10
*ISL62381, ISL62382 ONLY
1µF
1µF
BOOT1
V IN
BOOT2
UGATE1
PHASE1
UGATE2
PHASE2
LGATE1
LGATE2
ISL62381, ISL62382, ISL62383
OCSET1
IS E N 1
VOUT1
OCSET2
IS E N 2
VOUT2
IRF7821x2
0.22µF
2.2µH
IRF7832x2
2k
FB1
LDO3*
LDO3FB*
LDO5
VCC1
VCC2
PGND
GND
FB2
L D O 3IN *
PGOOD1
VBAT
100k
PGOOD2
EN1
EN2
LD O 3EN *
FCCM
FSET1
FSET2
14k
100k
17.4k
0.01µF
0.001
2k
1 .5 V
330µFx2
590
36.5k _1800pF
24.3k
LDO5
0.01µF
FIGURE 4. TYPICAL APPLICATION CIRCUIT WITH RESISTOR CURRENT SENSE
7
FN6665.4
August 7, 2008