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| LTC3444_15 Datasheet, PDF (18/20 Pages) Linear Technology – Micropower Synchronous Buck-Boost DC/DC Converter for WCDMA Applications | |||
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LTC3444
TYPICAL APPLICATIO S
Example of Internal Compensation Transient Response for a
Command Voltage Change
LTC3444 Dynamic Response
LTC3444 Dynamic Response
VOUT
VCONTROL
10μs/DIV
VIN = 3.6V, VOUT = 0.8V TO 4.2V
VCONTROL = 2.36V TO 0.28V, ILOAD = 100mA
3444 G16a
VOUT
VCONTROL
10μs/DIV
VIN = 3.6V, VOUT = 4.2V TO 0.8V
VCONTROL = 0.28V TO 2.36V, ILOAD = 100mA
!""" / %
Internally Compensated WCDMA Application. Singe Cell, 2.7V to
4.2V Input, 0.8V to 4.2V at 400mA Output.
1.5μH
L1
2.7V TO 4.2V
CIN
+ 4.7μF
Li-Ion
LTC3444
SW1
SW2
VIN
SHDN
VOUT
FB
GND
VC
R1
340k
VOUT
0.8V TO 4.2V
COUT
4.7μF
R3
R2 205k
267k
VCONTROL
DAC
3444 TA02
CIN = MURATA:GRM31CR61C475K
COUT = MURATA:GRM31CR61C475K
L1 = COOPER BUSSMAN SD12-2R2
3444fb
18
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