Datasheet
MAX8686
Single/Multiphase, Step-Down,
DC-DC Converter Delivers Up to 25A Per Phase
______________________________________________________________________________________ 15
BST
31
32
33
34
35
36
37
38
39
40
LX
GFREQ
POWER-
OK
C1
330pF
C17
1μF
C18
0.22μF
C16
0.22μF
C15
0.1μF
C3
10nF
C5
2.2nF
C4
150pF
R5
5.6kΩ
R16
162kΩ
R3
200kΩ
R4
115kΩ
R2
130kΩ
C13
10μF
C12
10μF
C6
220μF
C7
220μF
C14
1μF
C11
10μF
INPUT
4.5V TO 5.5V
30
29
28
27
26
25
24
23
22
21
POK
SS
ILIM
COMP
RS+
RS-
LX
GFREQ
REFIN
PHASE/REFO
FREQ
IN
N.C.
LX
PGND
U1
PGND
PGND
PGND
PGND
IN
IN
LX
RTN
PGND
PGND
PGND
EN/SLOPE
GFREQ
CS+
CS-
AVL
GND
INA
IN
IN
IN
IN
IN
IN
VL
PGND
5
6
7
9
10
4
3
2
1
8
15
16
17
19
20
14
13
12
11
18
R11
270Ω
R13
10Ω
R1
10kΩ
ENABLE
(EN)
OUTPUT
1.2V/25A
L11
0.56μH
MAX8686
R14
270Ω
C2
15pF
+
Figure 3. Single-Phase Application Circuit Operating at V
IN
= 5V