Datasheet

MAX1533A/MAX1537A
High-Efficiency, 5x Output, Main Power-Supply
Controllers for Notebook Computers
______________________________________________________________________________________ 17
Figure 1. MAX1533A/MAX1537A Standard Application Circuit
R3
60.4kΩ
R4
100kΩ
R5
60.4kΩ
LDO5
DH3
BST3
DL3
LX3
CSH3
ILIM5
C
BST
0.1μF
N
H2
D
L2
R
CS2
10mΩ
C
OUT2
150μF
40mΩ
REF (300kHz)
CONNECT
TO LDO5
POWER-GOOD
3.3V LDO
OUTPUT
N
L2
C
BST
0.1μF
N
H1
N
L1
R
CS1
10mΩ
C
OUT1
220μF
40mΩ
D
L1
L1
5.8μH
D
BST
D
BST
C1
10μF
5V LDO
OUTPUT
3.3V PWM
OUTPUT
C
REF
0.22μF
INPUT (V
IN
)
SEE TABLE 1 FOR COMPONENT SPECIFICATIONS
SHDN
FB3
OVP
POWER GROUND
ANALOG GROUND
MAX1533A
MAX1537A
REF
C
IN
(2) 10μF
ON OFF
12V LDO
OUTPUT
MAX1537A ONLY
ON3
ON5
INA
ONA
R2
100kΩ
BST5
LX5
DL5
PGND
GND
CSH5
CSL5
FB5
UVP
SKIP
DH5
IN
ILIM3
CSL3
ON OFF
SECONDARY
OUTPUT
ON OFF
C5
22μF
D1
5V PWM
OUTPUT
SECONDARY
OUTPUT
T1
1:2 TURNS
LP = 6.8μH
FSEL
VCC
PGOOD
PGDLY
R1
20Ω
C2
1μF
R8
100kΩ
LDO3
C3
10μF
R7
0Ω
C4
10μF
LDOA
ADJA
R6
OPEN