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ADP1621 Datasheet(PDF) 6 Page - Analog Devices

Part No. ADP1621
Description  Constant-Frequency, Current-Mode Step-Up DC/DC Controller
Download  32 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADP1621 Datasheet(HTML) 6 Page - Analog Devices

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ADP1621
Rev. A | Page 6 of 32
SIMPLIFIED BLOCK DIAGRAM
CS
PGND
FREQ
OSC
VOSC
1.4V
VREF
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
gm
n
+
+
SOFT START
(2048 CYCLES)
UVLO
Figure 3. ADP1621 Simplified Block Diagram


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