isl8033 Intersil Corporation, isl8033 Datasheet - Page 2

• Manufacturer Part Number: isl8033
• Description: Dual 3a Low Quiescent Current High Efficiency Synchronous Buck Regulator
• Manufacturer: Intersil Corporation

Typical Application Circuit
NOTE: The minimum output capacitor value is given for different output voltage to make sure the whole converter system is
stable. Output capacitance should increase to support faster load transient requirement.
C2 (or C4)
C3 (or C5)
R2 (or R5)
R3 (or R6)
C2 (or C4)
C3 (or C5)
R2 (or R5)
R3 (or R6)
L1 (or L2)
L1 (or L2)
PART NUMBER
V
V
ISL8033A
OUT
C1
OUT
C1
ISL8033
INPUT 2.85V TO 6V
2x22µF
1.0µH~2.2µH
0.47~1.5µH
C1
2x22µF
2x22µF
2x22µF
2x22µF
FIGURE 1. TYPICAL APPLICATION DIAGRAM - DUAL INDEPENDENT OUTPUTS
0.8V
100k
0.8V
100k
12pF
12pF
Internally fixed switching frequency F
Internally fixed switching frequency F
0
0
2
TABLE 2. ISL8033A COMPONENT VALUE SELECTION
TABLE 1. ISL8033 COMPONENT VALUE SELECTION
1.0µH~2.2µH
0.47~1.5µH
2x22µF
2x22µF
2x22µF
2x22µF
1.2V
100k
1.2V
100k
12pF
12pF
50k
50k
TABLE 3. SUMMARY OF DIFFERENCES
ISL8033, ISL8033A
VIN1, 2
VDD
ISET
EN1
PG1
SYNC
EN2
PG2
1.0µH~2.2µH
0.47~1.5µH
ISL8033
2x22µF
2x22µF
2x22µF
2x22µF
87.5k
87.5k
1.5V
100k
1.5V
100k
SW
SW
12pF
12pF
SWITCHING FREQUENCY
= 1MHz
= 2.5MHz
PGND
SGND
PGND
SGND
LX1
FB1
LX2
FB2
1.0µH~3.3µH
0.47~1.5µH
2x22µF
2x22µF
2x22µF
2x22µF
1.8V
124k
100k
1.8V
124k
100k
12pF
12pF
1.5µH
1.5µH
L1
2x22µF
L2
2x22µF
C2
C4
100k
100k
R3
R6
124k
124k
R2
R5
1.0µH~3.3µH
1.0~2.2µH
2x22µF
2x22µF
2x22µF
2x22µF
212.5k
212.5k
OUTPUT1
OUTPUT2
2.5V
100k
2.5V
100k
12pF
12pF
1.8V/3A
1.8V/3A
12pF
12pF
C3
C5
1.0µH~4.7µH
1.0~3.3µH
October 21, 2010
2x22µF
2x22µF
2x22µF
2x22µF
312.5k
312.5k
3.3V
100k
3.3V
100k
12pF
12pF
FN6854.1