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LTC3875 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC3875
Description  Dual, 2-Phase, Synchronous Controller with Low Value DCR Sensing and Temperature Compensation
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3875 Datasheet(HTML) 5 Page - Linear Technology

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LTC3875
5
3875fa
For more information www.linear.com/LTC3875
Typical perForMance characTerisTics
Load Step
(Figure 16 Application Circuit)
(Forced Continuous Mode)
Load Step
(Figure 16 Application Circuit)
(Pulse-Skipping Mode)
Prebiased Output at 1V
Coincident Tracking
Tracking Up and Down
with External Ramp
Quiescent Current
vs Temperature without EXTVCC
Efficiency vs Output Current and
Mode (Figure 16 Application Circuit)
Efficiency vs Output Current and
Mode (Figure 16 Application Circuit)
Load Step
(Figure 16 Application Circuit)
(Burst Mode Operation)
LOAD CURRENT (A)
30
90
100
20
10
80
50
70
60
40
0.01
1
10
100
3875 G01
0
0.1
Burst Mode
OPERATION
CCM
VIN = 12V
VOUT = 1.5V
PULSE-SKIPPING
LOAD CURRENT (A)
30
90
100
20
10
80
50
70
60
40
0.01
1
10
100
3875 G02
0
0.1
Burst Mode
OPERATION
CCM
VIN = 12V
VOUT = 1V
PULSE-
SKIPPING
ILOAD
40A/DIV
5A TO 30A
VOUT
100mV/DIV
AC-COUPLED
10µs/DIV
3875 G03
VIN = 12V
VOUT = 1.5V
IL1, IL2
10A/DIV
ILOAD
40A/DIV
5A TO 30A
VOUT
100mV/DIV
AC-COUPLED
10µs/DIV
3875 G04
VIN = 12V
VOUT = 1.5V
IL1, IL2
10A/DIV
ILOAD
40A/DIV
5A TO 30A
VOUT
100mV/DIV
AC-COUPLED
10µs/DIV
3875 G05
VIN = 12V
VOUT = 1.5V
IL1, IL2
10A/DIV
VOUT
1V/DIV
VOSNS+
500mV/DIV
TK/SS
500mV/DIV
2.5ms/DIV
3875 G06
VIN = 12V
VOUT = 1.5V
CCM: NO LOAD
RUN
2V/DIV
VOUT1
VOUT2
1V/DIV
2.5ms/DIV
3875 G07
VIN = 12V
VOUT1 = 1.5V, RLOAD = 12, CCM
VOUT2 = 1V, RLOAD = 6, CCM
VOUT1
VOUT2
TK/SS1
TK/SS2
2V/DIV
VOUT1
VOUT2
500mV/DIV
10ms/DIV
3875 G08
VIN = 12V
VOUT1 = 1V, 1 LOAD
VOUT2 = 1.5V, 1.5 LOAD
VOUT1
VOUT2
TEMPERATURE (°C)
–50
5.0
5.5
6.5
7.0
7.5
10.0
8.5
–10
30 50
130
3875 G09
6.0
9.0
9.5
8.0
–30
10
70 90 110


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