MAX1652 Datasheet, PDF (14/28 Pages) Maxim Integrated Products – High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP

High-Efficiency, PWM, Step-Down
DC-DC Controllers in 16-Pin QSOP
2.5V (1V, MAX1655)
MAIN PWM
COMPARATOR
SKIP
(MAX1653/
MAX1655
ONLY)
SS
SHDN
-100mV
25mV
SLOPE COMP
IDLE MODE
COMPARATOR
VL
4µA
CURRENT
LIMIT
24R
2.5V _1R
N
SYNCHRONOUS-
RECTIFIER CONTROL
RQ
S
R
Q
S
OSC
CSH
CSL
FROM
FEEDBACK
DIVIDER
BST
LEVEL
SHIFT
DH
LX
SHOOT-
THROUGH
CONTROL
LEVEL
SHIFT
VL
DL
PGND
REF (MAX1652)
GND (MAX1654)
SECFB
COMPARATOR
(NOTE 1)
1µs
SINGLE-SHOT
MAX1652, MAX1654 ONLY
NOTE 1: COMPARATOR INPUT POLARITIES
ARE REVERSED FOR THE MAX1654.
Figure 3. PWM Controller Detailed Block Diagram
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