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LTC3886 Datasheet(PDF) 10 Page - Linear Technology

Part # LTC3886
Description  60V Dual Output Step-Down Controller with Digital Power System Management
Download  116 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3886 Datasheet(HTML) 10 Page - Linear Technology

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LTC3886
10
3886f
For more information www.linear.com/LTC3886
Typical perForMance characTerisTics
EXTVCC Switchover
vs Temperature
Load Step
(Forced Continuous Mode)
Load Step
(Pulse-Skipping Mode)
Inductor Current at Light Load
Start-Up into a Pre-Biased Load
Soft-Start Ramp
Efficiency vs Load Current,
VOUT = 12V
Efficiency vs Load Current,
VOUT = 5V
Efficiency and Power Loss
vs Input Voltage
LOAD CURRENT (A)
30
90
100
20
10
80
50
70
60
40
0.01
1
10
100
3886 G01
0
0.1
CCM
DCM
VIN = 48V
VOUT = 12V
fSW = 150kHz
L = 6.8µH
DCR = 1.86m
LOAD CURRENT (A)
30
90
100
20
10
80
50
70
60
40
0.01
1
10
100
3883 G02
0
0.1
CCM
DCM
VIN = 48V
VOUT = 5V
fSW = 150kHz
L = 6.8µH
DCR = 1.86m
VIN (V)
18
94
95
96
97
98
2
4
6
8
10
28
38
3886 G03
48
EFFICIENCY
POWER LOSS
VIN = 12V
fSW = 150kHz
L = 6.8µH
DCR = 1.86m
FORCED
CONTINUOUS
MODE
2A/DIV
PULSE-SKIPPING
MODE
2A/DIV
1µs/DIV
VIN = 12V
VOUT = 1.8V
ILOAD = 100µA
3886 G07
ILOAD
5A/DIV
INDUCTOR
CURRENT
5A/DIV
VOUT
100mV/DIV
AC-COUPLED
50µs/DIV
VIN = 12V
VOUT = 1.8V
0.3A TO 5A STEP
3886 G05
ILOAD
5A/DIV
INDUCTOR
CURRENT
5A/DIV
VOUT
100mV/DIV
AC-COUPLED
50µs/DIV
VIN = 12V
VOUT = 1.8V
0.3A TO 5A STEP
3886 G06
RUN
2V/DIV
VOUT
1V/DIV
5ms/DIV
tRISE = 10ms
tDELAY = 5ms
VOUT = 2V
3886 G08
RUN
2V/DIV
VOUT
1V/DIV
5ms/DIV
tRISE = 10ms
tDELAY = 5ms
3886 G09
TA = 25C, VIN = 16V, EXTVCC = 0V, unless otherwise noted.
TEMPERATURE (°C)
–50 –25
4.700
4.704
4.702
0
100
4.710
4.708
4.706
25
50
75
125
3886 G04


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