ADP3156JR-25 AD [Analog Devices], ADP3156JR-25 Datasheet - Page 4

• Manufacturer Part Number: ADP3156JR-25
• Description: Dual Power Supply Controller for Desktop Systems
• Manufacturer: AD [Analog Devices]

ADP3156
+1.5V
1000 F
RTN
V
4A
SYSTEM
O2
P
100k
IRL3103
R4
5k
R3
20k
Figure 2. ADP3156 Typical VRM8.4 AGP and GTL Chipset DC/DC Converter Circuit
47pF
2k
1
2
3
4
5
6
7
8
SD
C
NC
NC
AGND
SD
FB
V
SENSE–
SENSE+
T
LDO
ADP3156-1.8
V
CC
V
DRIVE1 DRIVE2 PGND
Q
T2
NONOVERLAP
IN
PWRGD
DRIVE1
DRIVE2
S
R
PGND
OFF-TIME
CONTROL
CROWBAR
CMP
DRIVE
V
Figure 3. Functional Block Diagram
OFF
CMPT
NC
CC
C
T
16
15
14
13
12
11
10
9
200pF
C
1nF
V
SENSE–
CMPI
T
IN
V
REF
CMP
+15%
AGND
–4–
R1
110k
R2
16k
V
DELAY
REF
V
T1
22 F
220
220
g
+5% V
m
PWRGD
ADP3156
1 F
22
REF
C
2nF
V
COMP
REF
REFERENCE
–5%
SENSE+
IRL3103
IRL3103
SENSE–
10BQ015
3 H
L1
R
ESR = 34m
2R
2700 F
(10V)
FB
V
12.9m
R
LDO
SENSE
2
1 F
1.7 H
L2
ESR = 60m
470 F 4
5V
5V RTN
12V
12V RTN
RTN
V
1.8V
7A
O
REV. 0