ISL6444_07 Datasheet, PDF (18/19 Pages) Intersil Corporation – Dual PWM Controller with DDR Memory Option for Gateway Applications

ISL6444
R9
100k
VDDQ
+2.5V
(6A)
R3
32k4
R4
18k2
R5
18k2
R6
18k2
C1, C2
10μF
CR1
Q1
1/2 IRF7313
C6
0.1μF
L1
4.7μH
+
C8
330μF
Q2
2/2 IRF7313
C10
0.01μF
C3
0.01μF
SOFT1
VIN
12 14
VCC
28
SOFT2
17
CR2
+5.0V_cc
GND
BOOT1
6
BOOT2
23
UGATE1 ₅
PHASE1 ₄
R1 _ISEN1
7
1k
LGATE1 ₂
24 ^UGATE2
PHASE2
25
ISEN2 ^R2
22
5.9k
ISL6444
27 ^LGATE2
PGND1 ₃
VSEN1
10
VOUT1
9
EN1
8
PG1
15
R7 OCSET1
11
1
PGND2
26
VSEN2
19
VOUT2
20
EN2
21
EN1
PG2/REF
16
OCSET2
18
13
Q3
1/2 IRF7313
C7
0.1μF
L2
1.5μH
VTT
+1.25V
(3A)
C9
+
Q4
330μF
2/2 IRF7313
VREF
1.25V
(10mA)
GND
DDR
VCC
FIGURE 13. APPLICATION CIRCUIT FOR COMPLETE DDR MEMORY POWER SOLUTION WITH TWO-STEP CONVERSION
18
FN9069.3
April 12, 2007