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LTC3826IG-1-TR Datasheet(PDF) 5 Page - Linear Technology

Part # LTC3826IG-1-TR
Description  30關A IQ, Dual, 2-Phase Synchronous Step-Down Controller
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3826IG-1-TR Datasheet(HTML) 5 Page - Linear Technology

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background image
LTC3826-1
5
38261fb
Inductor Current at Light Load
Soft Start-Up
Tracking Start-Up
TYPICAL PERFORMANCE CHARACTERISTICS
Total Input Supply Current
vs Input Voltage
EXTVCC Switchover and INTVCC
Voltages vs Temperature
INTVCC Line Regulation
Maximum Current Sense Voltage
vs ITH Voltage
Sense Pins Total Input
Bias Current
Maximum Current Sense
Threshold vs Duty Cycle
2μs/DIV
FIGURE 13 CIRCUIT
VOUT = 3.3V
ILOAD = 100μA
FORCED
CONTINUOUS
MODE
2A/DIV
Burst Mode
OPERATION
PULSE
SKIPPING
MODE
38261 G07
20ms/DIV
38261 G08
VOUT2
2V/DIV
VOUT1
2V/DIV
20ms/DIV
38261 G09
VOUT2
2V/DIV
VOUT1
2V/DIV
INPUT VOLTAGE (V)
5
350
300
250
200
150
100
50
0
20
30
38261 G10
10
15
25
35
NO LOAD
300μA LOAD
TEMPERATURE (°C)
–45
4.0
4.2
4.6
4.8
5.0
6.0
5.4
–5
35
55
38261 G11
4.4
5.6
5.8
5.2
–25
15
75
95
INTVCC
EXTVCC RISING
EXTVCC FALLING
INPUT VOLTAGE (V)
0
5.0
5.5
5.2
10
20
25
38261 G12
5.3
5.4
5.1
515
30
35
40
ITH PIN VOLTAGE (V)
0
40
60
100
0.6
1.0
38261 G13
20
0
0.2
0.4
0.8
1.2
1.4
–20
–40
80
PULSE SKIPPING
FORCED CONTINUOUS
Burst Mode OPERATION
(RISING)
Burst Mode OPERATION
(FALLING)
10% DUTY CYCLE
VSENSE COMMON MODE VOLTAGE (V)
0
–120
–60
0
60
8
38261 G14
–180
–240
–150
–90
–30
30
–210
–270
–300
2
4
6
10
7
1
3
5
9
DUTY CYCLE (%)
0
40
80
120
20
60
100
20
40
60
80
38261 G15
100
10
030
50
70
90
FIGURE 13 CIRCUIT
FIGURE 13 CIRCUIT
FIGURE 13 CIRCUIT


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