Datasheet

MAX5038/MAX5041
Dual-Phase, Parallelable, Average Current-Mode
Controllers
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Detailed Description
The MAX5038/MAX5041 (Figures 1 and 2) average cur-
rent-mode PWM controllers drive two out-of-phase
buck converter channels. Average current-mode con-
trol improves current sharing between the channels
while minimizing component derating and size. Parallel
multiple MAX5038/MAX5041 regulators to increase the
output current capacity. For maximum ripple rejection
at the input, set the phase shift between phases to 90°
for two paralleled converters, or 60° for three paralleled
converters. Paralleling the MAX5038/MAX5041s
improves design flexibility in applications requiring
upgrades (higher load).
CLKIN
PLLCMP
PGND
PHASE
DL2
LX2
DH2
DL1
LX1
DH1
V
CC
EAOUT
EAN
DIFF
EN
CSP2
CSN2
CSP1
CSN1
MAX5038
3
R1
C39
V
IN
= +12V
C1, C2
21
15
IN
C25
C26
R4
R7
R8
R6
C29
C30
R5
C27
C28
SGND
CLP2
CLP1
Q2
Q1
D2
Q2
D1
V
IN
Q1
V
IN
D4
D3
C32
C12
C31
C3–C7
L2
R3
L1
R2
C13
C8–C11
C14,
C15
C16–C24,
C33
LOAD
+1.8V AT 60A
V
OUT
SENSE -
SENSE +
17
18
19
16
20
25
24
23
26
9
8
14
13
1
2
BST1
V
CC
28
4
10
11
12
7
5
6
22
BST2
NOTE: SEE TABLE 1 FOR COMPONENT VALUES.
V
CC
R
X
Figure 1. MAX5038 Typical Application Circuit, V
IN
= +12V