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LTC3444 Datasheet(PDF) 18 Page - Linear Technology

Part # LTC3444
Description  Micropower Synchronous Buck-Boost DC/DC Converter for WCDMA Applications
PDF  20 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3444 Datasheet(HTML) 18 Page - Linear Technology

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18
LTC3444
3444fb
Example of Internal Compensation Transient Response for a
Command Voltage Change
TYPICAL APPLICATIO S
LTC3444
VCONTROL
2.7V TO 4.2V
SW2
R1
340k
COUT
4.7
μF
1.5
μH
L1
CIN
4.7
μF
VOUT
0.8V TO 4.2V
R3
205k
R2
267k
VOUT
FB
VC
SW1
VIN
SHDN
GND
DAC
+
Li-Ion
3444 TA02
CIN =
COUT =
L1 =
MURATA:GRM31CR61C475K
MURATA:GRM31CR61C475K
COOPER BUSSMAN SD12-2R2
Internally Compensated WCDMA Application. Singe Cell, 2.7V to
4.2V Input, 0.8V to 4.2V at 400mA Output.
VIN = 3.6V, VOUT = 0.8V TO 4.2V
VCONTROL = 2.36V TO 0.28V, ILOAD = 100mA
VCONTROL
10
μs/DIV
VOUT
3444 G16a
VIN = 3.6V, VOUT = 4.2V TO 0.8V
VCONTROL = 0.28V TO 2.36V, ILOAD = 100mA
VCONTROL
VOUT
!""" /%
10
μs/DIV
LTC3444 Dynamic Response
LTC3444 Dynamic Response



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