MAX649 Datasheet, PDF (8/16 Pages) Maxim Integrated Products – 5V/3.3V/3V or Adjustable, High-Efficiency,

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