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LTC3853 Scheda tecnica(PDF) 6 Page - Linear Technology

Il numero della parte LTC3853
Spiegazioni elettronici  Triple Output, Multiphase Synchronous Step-Down Controller
PDF  36 Pages
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Produttore elettronici  LINER [Linear Technology]
Homepage  http://www.linear.com
Logo LINER - Linear Technology

LTC3853 Scheda tecnica(HTML) 6 Page - Linear Technology

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LTC3853
6
3853fc
For more information www.linear.com/LTC3853
TYPICAL PERFORMANCE CHARACTERISTICS
Coincident Tracking
Prebiased Output at 2V
Maximum Current Sense Voltage vs
Feedback Voltage (Current Foldback)
Quiescent Current
vs Input Voltage Without EXTVCC
Internal VCC Line Regulation
Current Sense Threshold
vs ITH Voltage
Maximum Current Sense Threshold
vs Common Mode Voltage
Maximum Current Sense
Threshold vs Duty Cycle
Tracking Up and Down
with External Ramp
50ms/DIV
VOUT
1V/DIV
VTK/SS
500mV/DIV
VFB
500mV/DIV
3853 G08
10ms/DIV
VIN = 12V
VOUT1 = 3.3V
VOUT2 = 2.5V
VOUT3 = 1.8V
RUN1
2V/DIV
VOUT1,2,3
1V/DIV
3853 G09
5ms/DIV
VIN = 12V
VOUT1 = 3.3V
VOUT2 = 2.5V
VOUT3 = 1.8V
TK/SS1
TK/SS2
TK/SS3
2V/DIV
VOUT1,2,3
1V/DIV
3853 G10
INPUT VOLTAGE (V)
5
5.0
5.5
25
3853 G11
4.5
4.0
10
15
20
6.0
INPUT VOLTAGE (V)
0
4.75
5.00
5.25
20
3853 G12
4.50
4.25
5
10
15
25
4.00
3.75
3.50
VITH (V)
0
–40
–20
0
20
40
60
80
0.5
1
1.5
2
3853 G13
ILIM = INTVCC
ILIM = GND
ILIM = FLOAT
VSENSE COMMON MODE VOLTAGE (V)
0
30
40
50
3
5
20
10
0
1
2
4
60
70
80
3853 G14
ILIM = INTVCC
ILIM = GND
ILIM = FLOAT
60
80
100
40
20
50
70
90
30
10
0
DUTY CYCLE (%)
0
60
100
20
40
80
3853 G15
ILIM = INTVCC
ILIM = GND
ILIM = FLOAT
FEEDBACK VOLTAGE (V)
0
40
50
60
0.8
3853 G16
30
20
0
0.2
0.4
0.6
0.1
0.9
0.3
0.5
0.7
10
80
70
ILIM = INTVCC
ILIM = FLOAT
ILIM = GND



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