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LTC3523 Datasheet(PDF) 7 Page - Linear Technology

Part # LTC3523
Description  Synchronous 600mA Step-Up and 400mA Step-Down DC/DC Converters
PDF  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3523 Datasheet(HTML) 7 Page - Linear Technology

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LTC3523/LTC3523-2
7
3523fb
BLOCK DIAGRAM
16
SHDN1
VIN
1.8V TO 5.5V
2
+
PWM
LOGIC
AND
DRIVERS
SHUTDOWN
AND
VBIAS
ANTI-RING
L1
4.7μH
VIN1
3
PGOOD1
15
10
VBAT
9
VIN2
SW1
VOUT
CIN
47μF
CC2
COUT
10μF
VOUT
STEP-UP
1.8V TO 5.25V
VOUT
STEP-DOWN
0.615V TO 5.5V
1.2V
R1
R2
COUT
10μF
R4
R3
MODE
gm ERROR
AMPLIFIER
ZERO CURRENT
COMP
CC1
RZ
CC1
GND3
RZ
5
4
FB1
STEP-UP
STEP-DOWN
SHARED
MODE
1
SW2
0.66V
GND2
L2
4.7μH
8
FB2
3523 BD
BULK CONTROL
SIGNALS
CURRENT
SENSE
IZERO
COMP
SHDN
MODE
OSC
SLP
+
+
PWM/ILIM
COMP
PWM/ILIM
COMP
ILIM
REF
SLOPE COMPENSATION
PWM
LOGIC
AND
DRIVERS
VOUT
LIMIT
COMP
MODE
OSC
ILIM
REF
0A
SHUTDOWN
AND
VBIAS
SHDN
+
–
+
+
SLP
+
–
1.2V
–9%
FB1
OSC
0.6V
1.2V
1V
SLP
+
–
+
–
+
–
–
MODE
MODE
START-UP
SOFT-START
AND
THERM REG
gm ERROR
AMPLIFIER
MODE
START-UP
SOFT-START
AND
THERM REG
OSCILLATOR
REFERENCE
THERMAL SHDN
11
PGOOD2
13
14
SHDN2
0.6V
–9%
FB2
+
–
SLOPE COMPENSATION
+
–
0.6V
12
GND2
7
GND1
6



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