ADP1621 Data Sheet
Rev. B | Page 6 of 32
SIMPLIFIED BLOCK DIAGRAM
CS
PGND
FREQ
OSC
V
OSC
1.4V
V
REF
1.215V
5.5V
5.5V
100kΩ
R
S
SET
SLOPE
COMP
PWM
COMPARATOR
ADP1621
GATE
DRIVER
ERROR
AMPLIFIER
GND
FB
GATE
PIN
COMP
IN
SDSN
g
m
n
+
+
SOFT START
(2048 CYCLES)
UVLO
06090-002
Figure 3. ADP1621 Simplified Block Diagram
