ISL6443A Datasheet, PDF (4/19 Pages) Intersil Corporation – 300kHz Dual, 180° Out-of-Phase, Step-Down PWM and Single Linear Controller

ISL6443A
Typical Application Schematic
C2
4.7µF
+ _C1
56µF
+12V
D1
BAT54HT1
C3
1µF
C4
0.1µF
VIN
SS1
18
10
BOOT1
24
VCC_5V
4
SS2
6
BOOT2
27
C5
0.1µF
C7
0.1µF
VOUT1
+1.2V, 2A
C9 ⁺
330µF
R1
4.99k
L1
6.4µH
Q1
FDS6990S
R2
10k
PGOOD
UGATE1 ₂₃
PHASE1 ₂₂
R3 _{ISEN1 21}
1.4k
LGATE1 ₂₅
PGND ₂₀
28 ^UGATE2
PHASE2
1
2 ^{ISEN2 R4}
1.4k
ISL6443A
26 ^LGATE2
(SEE NOTE)
8 ^FB2
FB1 ₁₅
SD1 ₁₉
SD2 ₅
OCSET1
16
R7
17 11
120k _SGND
SYNC
SGND
9
14 ^SGND
13 ^GATE3
12 ^FB3
OCSET2
7
3
R8
120k
PGOOD
R9
10k
VCC_5V
D2
BAT54HT1
C6
1µF
C8
0.1µF
L2
6.4µH
Q2
FDS6990S
+ C10
330µF
R5
31.6k
VOUT2
+3.3V, 2A
R6
10k
C11
0.01µF
VOUT2
+3.3V
R12
100
Q3
IRF7404
VOUT3
R10
21.5k
+2.5V, 500mA
C12
10µF
R11
10k
NOTE: Pin numbers correspond to the QFN pinout.
4
FN6600.1
December 7, 2007