Multi-Output, Low-Noise Power-Supply
Controllers for Notebook Computers
MAX1630–MAX1635
CSH_
1X
CSL_
REF
FROM
FEEDBACK
DIVIDER
MAIN PWM
COMPARATOR
R
Q
S
LEVEL
SHIFT
BST_
DH_
LX_
SLOPE COMP
OSC
30mV
SKIP
DAC
CURRENT
LIMIT
SHOOT-
THROUGH
CONTROL
CK
SHDN
COUNTER
SOFT-START
SYNCHRONOUS
RECTIFIER CONTROL
R
-100mV
S
VL
Q
LEVEL
SHIFT
DL_
PGND
REF
1µs
SINGLE-SHOT
SECFB
Figure 3. PWM Controller Detailed Block Diagram
12
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