iru3138 International Rectifier Corp., iru3138 Datasheet - Page 14

• Manufacturer Part Number: iru3138
• Description: Synchronous Pwm Controller For Termination Power Supply Applications -
• Manufacturer: International Rectifier Corp.

IRU3138
TYPICAL APPLICATION
14
47pF
68pF
C15
C16
R5
R4
1K
1K
6800pF
0.1uF
3300pF
0.15uF
C12
C14
Figure 12 - Typical application of IRU3137 for DDR memory when the termination voltage,
C8
12K
C6
20K
R6
R2
1uF
1uF
C1
C9
SS
V
V
SS
Rt
Comp
Comp
REF
P
Gnd
IRU3137
IRU3138
Vcc
Vcc
5V
5V
Gnd
U1
U2
generated by IRU3138, tracks the core voltage.
Vc
Vc
PGnd
HDrv
HDrv
LDrv
LDrv
Fb
Fb
12V
12V
C2
1uF
C10
1uF
D1
1N4148
D2
1N4148
www.irf.com
Q2
IRF3711S
Q1
IRF3711S
R3
1K
Q3
IRF7460
Q4
IRF7457
1.25K
R1
C5
4x 150uF
6TPB150M
C11
3x 150uF
6TPB150M
2.2uH
2.2uH
1uH
L3
L1
L2
C4
47uF
C7
3x 330uF
6TPC330M
C13
3x 330uF
6TPC330M
(0.9V @ 10A)
1.8V @ 15A
V
5V
V
TT
DDQ
01/29/04
Rev. 1.0