Datasheet

MCP1650/51/52/53
DS21876B-page 2  2004-2013 Microchip Technology Inc.
MCP1650 Block Diagram
ISNS
+
-
1.22V
1R
9R
+
-
+
-
Internal Osc. with
2 fixed Duty Cycles
V
HIGH
V
LOW
V
DUTY
+
-
V
REF
V
IN
V
HIGH
V
LOW
V
DUTY
DC = 80% V
IN
< 3.8V
DC = 56% V
IN
> 3.8V
V
IN
+
-
Voltage Feedback
Current Limit
CS
V
IN
EXT
Osc.
SHDN
FB
V
REF
1.22V
S
R
Q
Pulse
DR
Soft-
Start
ON/
OSC. OUT
GND
ON/OFF
Control
MCP1650
Latch
Ref
0.122V
OFF