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LTC1879 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC1879
Description  2.5A, 10V, Monolithic Synchronous Step-Down Regulator
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1879 Datasheet(HTML) 5 Page - Linear Technology

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LTC3602
5
3602fb
BURST CLAMP VOLTAGE (V)
0.4
2.0
2.5
0.7
0.9
1.5
1.0
0.5
0.6
0.8
1.0
0.5
0
3.0
3602 G12
INPUT VOLTAGE (V)
4
90
95
79
85
80
56
8
10
75
70
100
3602 G16
ILOAD = 2.5A
ILOAD = 1A
FIGURE 6 CIRCUIT
LOAD CURRENT (A)
0
–0.10
0.00
1.5
2.5
0.5
1
2
3
–0.20
0.10
3602 G18
FIGURE 6 CIRCUIT
VIN = 7V
TYPICAL PERFORMANCE CHARACTERISTICS
Minimum Peak Inductor Current
vs Burst Clamp Voltage
Maximum Peak Inductor Current
vs Duty Cycle
Efficiency vs Load Current,
Burst Mode Operation
Efficiency vs Load Current,
Forced Continuous
Efficiency vs Input Voltage
Efficiency vs Frequency
Load Regulation
5V LDO Output Voltage
vs Temperature
TRACK/SS Current
vs Temperature
DUTY CYCLE (%)
0
3
4
5
80
2
1
0
10 20 30 40 50 60 70
90 100
3602 G13
FREQUENCY (kHz)
0
84
88
92
96
500
1000
2000
1500
2500
100
86
90
94
98
3000
3602 G17
1μH
4.7μH
2.2μH
FIGURE 6 CIRCUIT
VIN = 7V
ILOAD = 1A
TEMPERATURE ( C)
–50
4.90
4.92
4.96
4.98
5.00
5.10
5.04
0
50
75
4.94
5.06
5.08
5.02
–25
25
100
125
3602 G19
TEMPERATURE ( C)
–50
1.10
1.15
1.25
1.30
1.35
1.40
0
50
75
1.20
–25
25
100
125
3602 G20
LOAD CURRENT (A)
0.01
90
95
0.1
1
10
85
80
75
70
100
3602 G14
FIGURE 6 CIRCUIT
VIN = 5V
VIN = 9V
LOAD CURRENT (A)
0.01
0.1
1
10
3602 G15
FIGURE 6 CIRCUIT
0
20
40
60
80
100
10
30
50
70
90
VIN = 5V
VIN = 9V


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