Step-down dc-dc controllers – Rainbow Electronics MAX652 User Manual
Page 8
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MAX649/MAX651/MAX652
5V/3.3V/3V or Adjustable, High-Efficiency,
Low I
Q
, Step-Down DC-DC Controllers
8
_______________________________________________________________________________________
MAX649
MAX651
MAX652
Q
MINIMUM
OFF-TIME
ONE-SHOT
TRIG
Q
MAXIMUM
ON-TIME
ONE-SHOT
TRIG
CURRENT
CONTROL CIRCUITS
DUAL-MODE™
COMPARATOR
ERROR
COMPARATOR
CURRENT
COMPARATOR
0.2V
(FULL CURRENT)
0.1V
(HALF CURRENT)
Q
S
R
FROM V+
FROM V+
CS
EXT
OUT
GND
REF
SHDN
FB
V+
1.5V
REFERENCE
N
Figure 2. Block Diagram
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