Datasheet
MAX8537/MAX8538/MAX8539
Dual-Synchronous Buck Controllers for Point-of-
Load, Tracking, and DDR Memory Power Supplies
12 ______________________________________________________________________________________
MAX8538
DL2
COMP2
GND
POK2
EN1
GND
FB2
SS2
FB1
ILIM2
PGND
LX2
ILIM1
FREQ
AVL
V+
VL
DL1
LX1
DH1
BST1
BST2
DH2
EN2
N.C.
SS1
COMP1
POK1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
C17
6.8nF
VL
VL
VL
C2
10µF
C3
1000µF
C28
1000µF
C29
1000µF
C5
0.47µF
C6
0.47µF
C12, C26
680µF
C13
10µF
C14
1µF
C15
1µF
C19
1.8nF
C18
10pF
C20
47pF
C21
0.010µF
C22
2.2nF
C24
0.01µF
C23
0.01µF
D1 D2
R19
100kΩ
R20
100kΩ
R5
100kΩ
R6
100kΩ
R7
2.2Ω
R8
4.7Ω
R9
51.1kΩ
R10
21.5kΩ
R11
21.5kΩ
R12
1.0kΩ
R13
2.2kΩ
R15
12.7kΩ
N1
N5
N7
N8
L1
1.0µH
L2
3.2µH
C39
1.0nF
POK1
POK2
EN1
EN2
VIN (10.8V TO 13.2V)
VOUT2
2.5V/
5A
VOUT1
1.8V/15A
R16
10.0kΩ
R14
14kΩ
N4N3
R21
2.2Ω
R2
511Ω
C7
0.1µF
R22
1.5Ω
R3
1.0kΩ
C10
0.1µF
C1
1000µF
C11
470µF
R23
10.0kΩ
C4
10µF
C40
2.2nF
U1
R24
1Ω
R25
1Ω
Figure 3. MAX8538 PowerPC™ Application (400kHz Switching)
PowerPC is a trademark of Motorola, Inc.