Datasheet

MAX1652–MAX1655
High-Efficiency, PWM, Step-Down
DC-DC Controllers in 16-Pin QSOP
14 ______________________________________________________________________________________
SHOOT-
THROUGH
CONTROL
R
Q
25mV
R
Q
LEVEL
SHIFT
1µs
SINGLE-SHOT
MAIN PWM
COMPARATOR
OSC
LEVEL
SHIFT
CURRENT
LIMIT
VL
24R
1R
2.5V
4µA
SYNCHRONOUS-
RECTIFIER CONTROL
2.5V (1V, MAX1655)
SS
SHDN
-100mV
(NOTE 1)
COMPARATOR
CSH
CSL
FROM
FEEDBACK
DIVIDER
BST
DH
LX
VL
DL
PGND
S
S
SLOPE COMP
IDLE MODE
COMPARATOR
N
SKIP
(MAX1653/
MAX1655
ONLY)
REF (MAX1652)
GND (MAX1654)
MAX1652, MAX1654 ONLY
SECFB
NOTE 1: COMPARATOR INPUT POLARITIES
ARE REVERSED FOR THE MAX1654.
Figure 3. PWM Controller Detailed Block Diagram