ISL62391 Datasheet, PDF (6/20 Pages) Intersil Corporation – High-Efficiency, Triple-Output System Power Supply Controller for Notebook Computers

ISL62391, ISL62392
Typical Application Circuits
The typical application circuits generate the 5V/8A and 3.3V/8A (system regulator), or 1.05V/15A and 1.5V/15A (chip set) supplies
in a notebook computer. The input supply (VBAT) range is 5.5V to 25V.
VBAT
4x10µF
3 .3 V
0.22µF
4.7µH
IRF7821
330µF
750
1200pF
45.3k
0.022µF 14k
IRF7832
14k
BOOT1
V IN
UGATE1
PHASE1
LGATE1
BOOT2
UGATE2
PHASE2
LGATE2
OCSET1
IS E N 1
VOUT1
OCSET2
IS E N 2
VOUT2
IRF7821
0.22µF
4.7µH
14k ^0.022µF
IRF7832
14k
5V
330µF
750
68.1k _1200pF
FB1
FB2
10k
ISL62391, ISL62392
9.09k
100k
LDO3
PGOOD
PVCC
4.7µF
EN1
EN2
LDO3EN
1µF
1µF
PVCC
VCC
PGND
PAD
FCCM
FSET1
FSET2
24.3k
0.01µF
19.6k
0.01µF
FIGURE 1. TYPICAL SYSTEM REGULATOR APPLICATION CIRCUIT WITH INDUCTOR DCR CURRENT SENSE
VBAT
4x10µF
3 .3 V
330µF
0.001
1k
0.22µF
4.7µH
1k
BOOT1
V IN
IRF7821
UGATE1
PHASE1
IRF7832
LGATE1
BOOT2
IRF7821
UGATE2
PHASE2
IRF7832
LGATE2
0.22µF
4.7µH
0.001
1k
1k
5V
330µF
750
1200pF ^45.3k
10k
3.3 V
4.7µF
1µF
1µF
OCSET1
IS E N 1
VOUT1
OCSET2
IS E N 2
VOUT2
750
68.1k _1200pF
FB1
FB2
ISL62391, ISL62392
LDO3
PVCC
VCC
PGND
GND
PGOOD
EN1
EN2
LD O 3EN
FCCM
FSET1
FSET2
19.6k
100k
24.3k
0.01µF
9.09k
PVCC
0.01µF
FIGURE 2. TYPICAL SYSTEM REGULATOR APPLICATION CIRCUIT WITH RESISTOR SENSE
6
FN6666.4
December 22, 2008