Datasheet

MAX1533A/MAX1537A
High-Efficiency, 5x Output, Main Power-Supply
Controllers for Notebook Computers
______________________________________________________________________________________ 19
Figure 2. MAX1533A/MAX1537A Functional Diagram
V
CC
REF
R
R
FB3
2.0V
REF
DH5
BST5
LX5
LDO5
DL5
PWM5
CONTROLLER
(FIGURE 3)
DH3
BST3
DL3
LDO5
LX3
PWM3
CONTROLLER
(FIGURE 3)
PGND
FB
DECODE
(FIGURE 5)
ON3
IN
FSEL
FB DECODE
(FIGURE 5)
FB5
ON5
ILIM5
CSH5
CSL5
ILIM3
CSH3
CSL3
OVP
PGOOD
POWER-GOOD AND
FAULT PROTECTION
(FIGURE 7)
INTERNAL
FB
FAULT
ADJA
LDOA
INA
ONA
SKIP
UVP
5V LINEAR
REGULATOR
3.3V LINEAR
REGULATOR
LDO5
PGDLY
MAX1537A
AUXILIARY
LINEAR
REGULATOR
(FIGURE 8)
GND
LDO3
LDO BYPASS
CIRCUITRY
LDO BYPASS
CIRCUITRY
OSC
SHDN
SECONDARY
FEEDBACK
MAX1533A/MAX1537A