Datasheet

MAX8597/MAX8598/MAX8599
Low-Dropout, Wide-Input-Voltage,
Step-Down Controllers
______________________________________________________________________________________ 15
MAX8597
GNDCOMP
REFO
FB
VL
DL
LX
DH
BST
SS
19
20
18
5
3
1810
11
15
14
13
VL
VL
C5
0.22µF
C7A
100µF
C7B
100µF
C13
4.7µF
D1
CMDSH-3
Q2
IRF7821
Q1
IRF7807Z
L1
0.56µH
AIN-
V
IN
(10.8V TO 13.2V)
V
OUT
1.8V/10A
EN
ON
OFF
C1
1µF
C3
0.01µF
C6
2200pF
C9
8200pF
C8
56pF
C10
1000pF
R1
20kΩ
R2
1.5kΩ
R7
390Ω
R6
10kΩ
AVL
R8
5.6kΩ
C2A
10µF
C2B
10µF
PGND
4
12
6
AOUT
R9
10Ω
AIN+
C12
1µF
R10
2Ω
C14
2200pF
R12
3Ω
2717 9 16
REFIN EN FREQ V+ ILIM
C11
0.22µF
C4
1000pF
R3
70kΩ
R4
18.2kΩ
R5
6.98kΩ
D2
CMPD914
REFIN
Figure 3. MAX8597 1MHz Tracking Supply with Clamp (Output voltage tracks V
REFIN
from 0V up to the nominal output regulation
voltage.)
MAX8598
MAX8599
GND
FB
PGND
DL
LX
DH
BST
16
3
5
4
2
110
9
13
12
11
VL
C7A
470µF
C7B
470µF
C11
4.7µF
D1
CMDSH-3
L1
0.7µH
POK
V
IN
(10.8V TO 13.2V)
V
OUT
1.2V/20A
EN
POK
ON
OFF
C1
1µF
C3
0.01µF
C4
0.033µF
C9
6800pF
C8
39pF
C8
1800pF
R1
40.2kΩ
R2
2.26kΩ
R6
1.2kΩ
R5
12.1kΩ
AVL
8
VL
R7
16kΩ
C2A
10µF
C2C
10µF
C2B
10µF
COMP
R8
10Ω
SS
R4
12.1kΩ
R9
3Ω
C12
2200pF
R11
3Ω
6157 14
EN FREQ V+ ILIM
C10
0.22µF
Q2
HAT2165H
Q3
HAT2165H
Q1
HAT2168H
AVL
R3
100kΩ
AVL
VL
C5
0.22µF
Figure 4. MAX8598/MAX8599 500kHz, 1.2V, 20A Output Power Supply
Design Procedure (continued)