MAX5037 MAXIM [Maxim Integrated Products], MAX5037 Datasheet - Page 12

• Manufacturer Part Number: MAX5037
• Description: VRM 9.0, Dual-Phase, Parallelable, Average Current-Mode Controller
• Manufacturer: MAXIM [Maxim Integrated Products]

The MAX5037 (Figures 1 and 2) average current-mode
PWM controller drives two out-of-phase buck converter
channels. Average current-mode control improves cur-
rent sharing between the channels while minimizing
component derating and size. Parallel multiple
MAX5037 regulators to increase the output current
VRM 9.0, Dual-Phase, Parallelable,
Average Current-Mode Controller
Figure 1. Typical VRM Application Circuit, V
12
V
IN
*SEE TABLE 2 FOR COMPONENT VALUES.
C43
______________________________________________________________________________________
INPUTS
DAC
R10
R7
R8
R9
R12
14
15
18
44
12
13
C36
1
2
3
4
8
6
V
EAOUT
REG
CNTR
VID4
VID3
VID2
VID1
VID0
OVPOUT
OVPIN
DIFF
EAN
CC
C32
EN
C35
CLP1
19
R6
7
C31
Detailed Description
R4
PLLCMP
42
CLP2
R5
C33
43
V
CLKIN
CC
38
C34
PGND
29
IN
V
IN
MAX5037
IN
= +5V
SGND
28
R13
5, 20, 35
IN
C1, C2
C42
= +5V
PHASE
SENSE-
11
41
PGOOD
10
SENSE+
9
CSN1
CSN2
17
40
CSP2
CSP1
16
39
V
CC
BST1
BST2
DH1
DH2
LX1
DL1
V
V
LX2
DL2
CC
DD
23
24
25
22
27
28
32
31
30
34
C39
capacity. For maximum ripple rejection at the input, set
the phase shift between phases to 90° for two paral-
leled converters, or 60° for three paralleled converters.
Paralleling the MAX5037s improves design flexibility in
applications requiring upgrades (higher load). The pro-
grammable output voltage utilizes VID codes compliant
with Intel’s VRM 9.0 specifications.
R3
V
IN
Q1
Q2
Q3
Q4
V
IN
C13
C40
D2
C8–C11
D1
PGOOD
C3–C7
5 x 22µF
D3
D4
C12
R11
C41
L1
L2
IN
R1
R2
C38
C14,
C15
C16–C25
C26–C30,
C37
LOAD
V
+1.85V AT 52A
OUT
= +1.1V TO