iru3072 International Rectifier Corp., iru3072 Datasheet - Page 21

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

TYPICAL APPLICATIONS
Rev. 1.0
3/25/04
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 32 - IRU3072 typical application with one bus input voltage V
IRLR2703
IRLR2703
C2
C4
C9
C10 82pF
C2
C4
C9
C10
Q1
Q2
Q3
Q1
Q2
Q3
C13
0.1uF
C13
0.1uF
10K
Figure 31 - IRU3072 typical application with ceramic capacitor output.
3.3K
220pF
R8
R8
2.15K
1.24K
2.15K
1.24K
866
R5
R1
R3
866
R5
R1
R3
33nF
33nF
47K
C14
R9
47K
C14
R9
R4
1K
R6
C11
R2
1K
1K
3.3nF
R4
1K
R6
R2
1K
1K
C11
15nF
V
Drv2
Fb2
Drv3
Fb3
Drv4
Fb4
Comp
Rt
SS1
SSLDO
V
Drv2
Fb2
Drv3
Fb3
Drv4
Fb4
Rt
SS1
SSLDO
Comp
SEN33
SEN33
Gnd
Gnd
IRU3072
IRU3072
/ SDB
U1
/ SDB
U1
PGnd
VccLDO
PGnd
VccLDO
OCSet
OCSet
HDrv
LDrv
HDrv
LDrv
Vcc
Fb1
Fb1
Vcc
Vc
Vc
www.irf.com
4.7K
R7
6.8K
C5
1uF
R7
D1
C5
1uF
C6
0.1uF
C1
1uF
C3
1uF
C6
0.1uF
C1
1uF
R11
1K
D2
Q4
IRF7460
Q5
IRF7460
Q4
IRF7460
Q5
IRF7460
R10
CC
1K
C7
47uF,16V
=V
C7
16TPB47M
47uF, 16V
BUS
1uH
L2 1uH
1uH
L2
=12V and 3.3V for LDO.
L1
1uH
L1
200
R12
124K
R10
62K
R12
V
10uF
C8
220pF
R11
4.64K
C15
C12
2x 47uF
Ceramic
IRU3072
C12
3x 6TPB330M
6.3V, 330uF, 40m
C8
10uF
+5V
V
V
1.2V @ 5A
IN
OUT1
V
1.2V
V
=12V
IN
OUT1
=12V
V
21