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Part Name
Description
ADP3156JR-2.5 View Datasheet(PDF) - Analog Devices
Part Name
Description
Manufacturer
ADP3156JR-2.5
Dual Power Supply Controller for Desktop Systems
Analog Devices
ADP3156JR-2.5 Datasheet PDF : 12 Pages
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ADP3156
100k
⍀
P
SYSTEM
IRL3103
V
O2
+1.5V
4A
1000
F
RTN
R4
5k
⍀
R3
20k
⍀
2k
⍀
47pF
ADP3156-1.8
1
NC
PGND
16
2
NC
NC
15
3
AGND
DRIVE1
14
4
SD
DRIVE2
13
5
FB
6
V
LDO
7
SENSE–
V
CC
12
PWRGD
11
CMP
10
8
SENSE+
C
T
9
C
T
200pF
1nF
22
⍀
22
F 1
F
ESR = 34m
⍀
2700
F
؋
2
(10V)
1
F
R1
110k
⍀
R2
16k
⍀
IRL3103
L1
3
H
R
SENSE
12.9m
⍀
IRL3103
10BQ015
C
COMP
2nF
220
⍀
220
⍀
L2
1.7
H
12V
5V
5V RTN
12V RTN
ESR = 60m
⍀
470
F
؋
4
V
O
1.8V
7A
RTN
Figure 2. ADP3156 Typical VRM8.4 AGP and GTL Chipset DC/DC Converter Circuit
V
CC
DRIVE1 DRIVE2 PGND AGND PWRGD SENSE+ SENSE–
DELAY
NONOVERLAP
SD
DRIVE
V
REF
+15%
2R
CROWBAR
IN
OFF
CMPI
V
REF
+5% V
REF
–5%
S
Q
R
V
T2
V
T1
g
m
V
REF
R
REFERENCE
C
T
CMPT
OFF-TIME
V
IN
CONTROL
SENSE–
ADP3156
V
LDO
FB
CMP
Figure 3. Functional Block Diagram
–4–
REV. 0
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