iru3072 International Rectifier Corp., iru3072 Datasheet - Page 20

• Manufacturer Part Number: iru3072
• Description: 20-pin Synchronous Pwm Controller/ 3 Ldo Controller -
• Manufacturer: International Rectifier Corp.

IRU3072
TYPICAL APPLICATIONS
20
V
V
V
V
V
V
OUT2
OUT4
OUT2
OUT4
3.3V
2.5V
OUT3
1.5V
2.5V
OUT3
1.5V
1.8V
3.3V
1.8V
Figure 30 - IRU3072 Typical application with 5V
Figure 29 - IRU3072 typical application with one bus input voltage V
IRLR2703
IRLR2703
C2
C4
C9
C10
C2
C9
C4
C10
Q1
Q2
Q3
Q1
Q2
Q3
C13
0.1uF
C13
0.1uF
6.8K
100pF
6.8K
R8
100pF
R8
2.15K
1.24K
1.24K
2.15K
866
R5
46.4K
866
R1
R3
R5
R1
R3
R9
33nF
33nF
C14
46.4K
C14
R9
R4
1K
R6
C11
10nF
R2
1K
1K
R4
1K
R6
C11
10nF
R2
1K
1K
V
Drv2
Fb2
Drv3
Fb3
Drv4
Fb4
Comp
Rt
SS1
SSLDO
Drv2
Fb2
Drv3
V
Fb3
Drv4
Fb4
Comp
Rt
SS1
SSLDO
SEN33
SEN33
Gnd
Gnd
IRU3072
IRU3072
/ SDB
U1
/ SDB
U1
PGnd
VccLDO
PGnd
VccLDO
OCSet
OCSet
HDrv
LDrv
Fb1
HDrv
Vcc
LDrv
Vc
Fb1
Vcc
Vc
www.irf.com
BUS
6.8K
R7
6.8K
R7
C5
1uF
input and 12V for the driver (charge pump is saved).
C3
1uF
C6
0.1uF
C1
1uF
R11
1K
C1
1uF
Q4
IRF7460
Q5
IRF7460
Q4
IRF7460
Q5
IRF7460
R10
1K
CC
C7
16TPB47M
47uF, 16V
C7
16TPB47M
47uF, 16V
=V
BUS
L2 1uH
1uH
L1
=5V and 3.3V for LDO.
1uH
1uH
L1
L2
C12
3x 6TPB330M
6.3V, 330uF, 40m
C8
10uF
C12
3x 6TPB330M
6.3V, 330uF, 40m
C8
10uF
V
V
1.2V @ 8A
IN
OUT1
12V
V
V
0.8V
=5V
IN
OUT1
=5V
Rev. 1.0
V
3/25/04
V