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LTC3868IGN-1 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC3868IGN-1
Description  Low IQ, Dual 2-Phase Synchronous Step-Down Controller
PDF  38 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3868IGN-1 Datasheet(HTML) 5 Page - Linear Technology

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LTC3868-1

38681fb
Typical perForMance characTerisTics
Efficiency and Power Loss
vs Output Current
Efficiency vs Load Current
Load Step (Burst Mode Operation)
Load Step
(Forced Continuous Mode)
Load Step (Pulse-Skipping Mode)
Inductor Current at Light Load
Soft Start-Up
Efficiency vs Input Voltage
OUTPUT CURRENT (A)
0.0001
40
50
60
70
80
0.001
0.01
0.1
1
10
38681 G02
30
20
10
0
90
100
VIN = 5V
VIN = 12V
VOUT = 3.3V
FIGURE 12 CIRCUIT
INPUT VOLTAGE (V)
0
90
92
94
38681 G03
88
86
84
80
10
20
5
15
25 28
82
98
96
FIGURE 12 CIRCUIT
VOUT = 3.3V
IOUT = 4A
OUTPUT CURRENT (A)
0.0001
40
50
60
70
80
0.001
0.01
0.1
1
10
38681 G01
30
20
10
0
90
100
10
100
1000
1
0.1
10000
FIGURE 12 CIRCUIT
VIN = 12V
VOUT = 3.3V
Burst Mode
OPERATION
PULSE-
SKIPPING
FCM
VOUT
100mV/DIV
AC-
COUPLED
IL
2A/DIV
20µs/DIV
38681 G04
VOUT = 3.3V
FIGURE 12 CIRCUIT
VOUT
100mV/DIV
AC-
COUPLED
IL
2A/DIV
20µs/DIV
38681 G05
VOUT = 3.3V
FIGURE 12 CIRCUIT
VOUT
100mV/DIV
AC-
COUPLED
IL
2A/DIV
20µs/DIV
38681 G06
VOUT = 3.3V
FIGURE 12 CIRCUIT
Burst Mode
OPERATION
2A/DIV
FORCED
CONTINUOUS
MODE
PULSE-
SKIPPING
MODE
2µs/DIV
38681 G07
VOUT = 3.3V
ILOAD = 200µA
FIGURE 12 CIRCUIT
VOUT2
2V/DIV
VOUT1
2V/DIV
20ms/DIV
38681 G08
FIGURE 12 CIRCUIT



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