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LTC3444 Просмотр технического описания (PDF) - Linear Technology
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LTC3444
Micropower Synchronous Buck-Boost DC/DC Converter for WCDMA Applications
Linear Technology
LTC3444 Datasheet PDF : 20 Pages
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LTC3444
TYPICAL PERFOR A CE CHARACTERISTICS
(T
A
= 25
°
C unless otherwise specified)
PMOS R
DS(ON)
0.30
0.25
0.20
NMOS R
DS(ON)
0.30
SWITCH B
0.25
0.20
SWITCH C
Boost Maximum Duty Cycle
90
85
80
0.15
0.15
75
0.10
–55 –25 5
35 65
TEMPERATURE (
°
C)
Error Amp Sink Current
400
V
IN
= V
OUT
= 3.6V
V
C
= 2V, FB = 3.6V
390
95 125
3444 G09
380
370
360
350
–55 –25 5
35 65
TEMPERATURE (
°
C)
95 125
3444 G12
0.10
–55 –25 5
35 65
TEMPERATURE (
°
C)
Active Quiescent Current
800
V
IN
= V
OUT
= 3.6V
750
95 125
3444 G10
700
650
600
550
500
–55 –25 5 35 65
TEMPERATURE (
°
C)
Minimum Start Voltage
2.85
2.80
2.75
2.70
2.65
2.60
2.55
2.50
2.45
2.40
–55
–25 5 35 65
TEMPERATURE (
°
C)
95 125
3444 G13
95 125
3444 G15
70
–55 –25 5
35 65
TEMPERATURE (
°
C)
Feedback Voltage
1.25
95 125
3444 G11
1.24
1.23
1.22
1.21
1.20
1.19
–55 –25 5
35 65
TEMERATURE (
°
C)
95 125
3444 G14
3444fb
4
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