iru3048 International Rectifier Corp., iru3048 Datasheet - Page 12

• Manufacturer Part Number: iru3048
• Description: Dual Synchronous Pwm Controller Circuitry And Ldo Controller
• Manufacturer: International Rectifier Corp.

IRU3048
DEMO-BOARD APPLICATION
12V to 3.3V @ 4A
5V to 1.8V @ 4A
3.3V to 2.5V @ 2A
12
2 . 5 V @ 2 A
3.3V
12V
5V
47uF
C14
33uF
1uF
C9
C4
1800pF
1800pF
C18
C19
IRLR2703
C8
1uF
C15
47uF
Q1
R5
1K
1uH
L1
1uF
10
46.4K
R2
39.2K
C5
C24
0.1uF
R9
R11
V
R7
1K
C o m p 1
V c c
V
Fb3
C o m p 2
SS
OUT3
Figure 9 - Demo-board application of IRU3048.
IRU3048
V c H 1
G n d
U1
C1
1uF
V c H 2
HDrv2
HDrv1
LDrv1
LDrv2
P G n d
Fb1
Fb2
www.irf.com
2.15
2.15
2.15
2.15
R10
R12
R1
R3
V
V
V
V
33uF
C2
1/2 of Q2
IRF7313
1/2 of Q3
IRF7313
1/2 of Q2
IRF7313
1/2 of Q3
IRF7313
L2
1uH
C6
47uF
C16
150uF
R4
4.7
R13
4.7
C10
470pF
C20
470pF
V
V
10.2uH
6.8uH
C7
1uF
C17
1uF
D1
BAT54S
L4
L3
R8
1K
R6
1.65K
R14
442
R15
1K
C11, C12
2x 150uF
C21, C22
2x 150uF
V
C3
0.1uF
C13
1uF
C23
1uF
3 . 3 V @ 4 A
1 . 8 V @ 4 A
09/12/02
Rev. 1.7