User Manual

MAX1519/MAX1545
Dual-Phase, Quick-PWM Controllers for
Programmable CPU Core Power Supplies
42 ______________________________________________________________________________________
INPUT*
7V TO 24V
OUTPUT
V
CC
POL
T
ON
ILIM
FLOAT
(300kHz)
REF
(MASTER)
COMP
OUTPUT
L4
C
BST4
0.22µF
N
H4
N
L4
C
IN
C11
0.22µF
R19
10Ω
R
COMP2
20kΩ
C
COMP2
270pF
R25
49.9kΩ
R24
200kΩ
C14
100pF
R20
100Ω
R21
100Ω
R22
100Ω
R23
100Ω
C12
1000pF
C13
1000pF
5V BIAS
SUPPLY
C10
1µF
DLS
(MASTER)
CSP
CSN
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
BST4
CONNECT TO
MAX1519/MAX1545
(SEE FIGURE 12a)
DD
LIMIT
TRIG
SKIP
(MASTER)
R
SENSE4
1.5mΩ
D2
1N4148
MAX1980
U3
BST
DH
LX
DL
PGND
GND
CS+
CS-
V+
CM+
CM-
V
DD
Figure 12c. Standard 4-Phase Desktop 4 Application Circuit (4th Phase—MAX1980 Slave)