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LTC3255 Datasheet(PDF) 9 Page - Linear Technology

Part # LTC3255
Description  Fixed Ratio High Power Inductorless (Charge Pump) DC/DC Controller
PDF  28 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3255 Datasheet(HTML) 9 Page - Linear Technology

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LTC7820
9
7820fc
For more information www.linear.com/LTC7820
BLOCK DIAGRAM
VHIGH
RF
RSENSE
M1
M2
M3
M4
G1
CB1
0.1µF
CF
DB1
CONTROL
LOGIC
ANTI-
SHOOT-THROUGH
24
BOOST1
23
ISENSE–
28
ISENSE+
27
SW1
25
G2
CB2
1µF
CFLY
DB2
21
VLOW_SENSE 19
BOOST2
50mA
22
VLOW
20
G3
CB3
1µF
CVLOW
VLOW
DB3
17
BOOST3
18
SW3
16
FAULT
9
G4
CINTVCC
4.7µF
15
INTVCC
EXTVCC > 6.5V
AND VCC > 7V
12
GND
7820 BD
29
VHIGH_SENSE
VLOW_SENSE
VHYS_PRGM
R2
500k
1
UVLO
120mV
HYSTERESIS
OVERCURRENT
COMPARATOR
50mV THRESHOLD
VCC
LDO
VCC
14
EXTVCC
LDO
EXTVCC
INTVCC
3.5µA ~ 7µA
11
PGOOD
1.01V
7
R3
500k
93mA
UV
8
TIMER
4
VCC
1µA ~ 6µA
RUN
6
INTVCC
10µA
FREQ
5
INTVCC
10µA
HYS_PRGM
3
OSC



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