Rainbow Electronics MAX652 - Manual (Page 8)

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