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LTC7124 Datasheet(PDF) 4 Page - Linear Technology

Part # LTC7124
Description  17V, Dual 3.5A Synchronous Step-Down Regulator with Ultralow Quiescent Current
PDF  22 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC7124 Datasheet(HTML) 4 Page - Linear Technology

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LTC7124
4
7124fa
For more information www.linear.com/LTC7124
TA = 25°C, VIN = 12V, L = 2.2µH, f = 1MHz unless
otherwise noted.
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency vs Load Current
for Varying Input Supply
VIN1 Supply Current
vs Temperature
Line Regulation, No Load
Load Regulation
RT Frequency vs Temperature
Spread Spectrum Center
Frequency vs Temperature
Efficiency vs Load Current in
Burst Mode at 1MHz
Efficiency vs Load Current in
Forced Continuous Mode at 1MHz
Efficiency vs Load Current in
Forced Continuous Mode at
2.25MHz
VOUT = 1.2V*
VOUT = 2.5V
VOUT = 3.3V
VOUT = 5.0V
LOAD CURRENT (A)
*L = 1µH
0.001
0.01
0.1
1
10
0
10
20
30
40
50
60
70
80
90
100
7124 G01
VOUT = 1.2V*
VOUT = 2.5V
VOUT = 3.3V
VOUT = 5.0V
LOAD CURRENT (A)
0.001
0.01
0.1
1
10
0
10
20
30
40
50
60
70
80
90
100
7124 G02
*L = 1µH
VOUT = 2.5V
VOUT = 3.3V
VOUT = 5.0V
LOAD CURRENT (A)
0.001
0.01
0.1
1
10
0
10
20
30
40
50
60
70
80
90
100
7124 G03
L = 1µH
VOUT = 1.8V
L = 1.0µH
VIN = 4V
VIN = 8V
VIN = 12V
VIN = 17V
LOAD CURRENT (A)
0.001
0.01
0.1
1
10
0
10
20
30
40
50
60
70
80
90
100
7124 G04
IQ SHUTDOWN
IQ BURST MODE, SINGLE
IQ BURST MODE, DUAL
TEMPERATURE (°C)
–50 –25
0
25
50
75
100 125
0
2
4
6
8
10
12
14
16
18
20
7124 G05
INPUT VOLTAGE (V)
VOUT = 2.5V
FORCED CONTINUOUS MODE
0 1 2 3 4 5 6 7 8 9 1011121314151617
–0.5
–0.3
–0.1
0.1
0.3
0.5
7124 G06
VOUT = 3.3V
FORCED CONTINUOUS MODE
LOAD CURRENT (A)
0
1
2
3
4
–5
–3
–1
1
3
5
7124 G07
TEMPERATURE (°C)
RRT = 100k
–50 –25
0
25
50
75
100 125
0.75
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
1.25
7124 G08
TEMPERATURE (°C)
RT TIED TO INTVCC
–50 –25
0
25
50
75
100 125
1.75
1.85
1.95
2.05
2.15
2.25
2.35
2.45
2.55
2.65
2.75
7124 G09



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