ADP3155 Analog Devices, ADP3155 Datasheet - Page 4

• Manufacturer Part Number: ADP3155
• Description: 5-Bit Programmable Triple Power Supply Controller for Pentium III Processors
• Manufacturer: Analog Devices

ADP3155
V
+1.5V
LDO1
RTN
4A
SYSTEM
P
1000 F
1 F
IRF3103
470pF
R3
20k
R4
5k
SD
Figure 2. Typical VRM8.2/8.3/8.4 Compliant Core DC/DC Converter Circuit
6
2k
V
C
16
11
CC
T
10
1
2
3
4
5
6
7
8
9
V
IN
DRIVE1 DRIVE2 PGND
NONOVERLAP
T2
VID1
VID2
VID3
VID4
AGND
SD
FB1
V
SENSE–
SENSE+
Q
18
LDO1
ADP3155
DRIVE
R
CROWBAR
S
CMPT
PWRGD
DRIVE1
DRIVE2
PGND
V
17
VID0
LDO2
CMP
OFF
Figure 3. Functional Block Diagram
FB2
V
CC
C
CONTROL
OFF-TIME
T
19
18
17
16
15
14
13
12
11
1nF
20
V
REF
CMPI
200pF
C
AGND
T
+ 15%
V
5
REF
V
SENSE–
100k
R2
39k
IN
R1
150k
+ 5% V
2k
PWRGD
22 F
–4–
CMP
15
V
12
T1
REF
DELAY
220
C
2nF
220
– 5%
1 F
COMP
ADP3155
SENSE+
g
22
m
10
Q1
IRL3803
Q2
IRL3803
V
REF
470pF
SENSE–
9
2R
R
ESR = 25m
REFERENCE
10BQ015
1.7 H
DAC
2200 F 3
L1
1.20V
R
EACH
5m
SENSE
ESR = 25m
13
14
1
2
3
4
8
1 F
Q4
IRLR3703
R6
21.7k
R5
20k
2200 F 6
V
V
VID0
VID1
VID2
VID3
VID4
FB2
FB1
LDO2
LDO1
1 H
L2
EACH
1000 F
1 F
+5V RTN
V
2V
0–19A
RTN
V
V
+12V RTN
V
+3.3V
V
+2.5V
V
0–2A
RTN
O
IN
IN
INLDO2
LDO2
IN
+1.8V
+12V
+5V
REV. A