User Manual

MAX1519/MAX1545
Dual-Phase, Quick-PWM Controllers for
Programmable CPU Core Power Supplies
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INPUT*
7V TO 24V
OUTPUT
V
CC
POL
T
ON
ILIM
FLOAT
(300kHz)
REF
(MASTER)
COMP
OUTPUT
L3
C
BST3
0.22µF
N
H3
N
L3
C
IN
C6
0.22µF
R12
10Ω
R
COMP1
20kΩ
C
COMP1
270pF
R18
49.9kΩ
R17
200kΩ
C9
100pF
R13
100Ω
R14
100Ω
R15
100Ω
R16
100Ω
C7
1000pF
C8
1000pF
5V BIAS
SUPPLY
C5
1µF
DLM
(MASTER)
CMP
CMN
CONNECT TO
MAX1519/MAX1545
(SEE FIGURE 12a)
C
OUT
POWER GROUND
ANALOG GROUND
(MASTER)
ANALOG GROUND
(SLAVE)
*LOWER INPUT VOLTAGES
REQUIRE ADDITIONAL
INPUT CAPACITANCE.
D
BST3
CONNECT TO
MAX1519/MAX1545
(SEE FIGURE 12a)
DD
LIMIT
TRIG
SKIP
(MASTER)
R
SENSE3
1.5mΩ
D1
1N4148
MAX1980
U2
BST
DH
LX
DL
PGND
GND
CS+
CS-
V+
CM+
CM-
V
DD
Figure 12b. Standard 4-Phase Desktop 4 Application Circuit (3rd Phase—MAX1980 Slave)