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LTC1775CS Datasheet(PDF) 4 Page - Linear Technology

Part # LTC1775CS
Description  High Power No RSENSE TM Current Mode Synchronous Step-Down Switching Regulator
PDF  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1775CS Datasheet(HTML) 4 Page - Linear Technology

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4
LTC1775
LOAD CURRENT (A)
0.001
10
1775 • G01
0.01
0.1
1.0
100
90
80
70
60
50
CONTINUOUS
MODE
BURST
MODE
VIN = 10V
VOUT = 5V
EXTVCC = VOUT
INPUT VOLTAGE (V)
0
100
95
90
85
80
75
70
5
10
15
20
1775 • G02
25
30
ILOAD = 5A
ILOAD = 500mA
VOUT = 5V
FIGURE 1 CIRCUIT
INPUT VOLTAGE (V)
0
5
10
15
20
25
30
100
95
90
85
80
75
70
1775 • G03
ILOAD = 5A
ILOAD = 500mA
VOUT = 3.3V
FIGURE 1 CIRCUIT
LOAD CURRENT (A)
0
0
– 0.1
– 0.2
– 0.3
– 0.4
– 0.5
8
1775 • G04
2
4
6
10
FIGURE 1 CIRCUIT
CURRENT LOAD (A)
0
10
1775 • G06
2
4
68
400
300
200
100
0
FIGURE 1 CIRCUIT
VOUT = 5V, 5% DROP
LOAD CURRENT (A)
0
3.0
2.5
2.0
1.5
1.0
0.5
0
610
1775 • G05
24
812
14
FIGURE 1 CIRCUIT
VIN = 20V
VOUT = 5V
CONTINUOUS
MODE
BURST
MODE
INTVCC LOAD CURRENT (mA)
0
500
400
300
200
100
0
40
1775 • G09
10
20
30
50
VIN = 15V
EXTVCC = 5V
INPUT VOLTAGE (V)
0
1200
1000
800
600
400
200
0
15
25
1775 • G07
510
20
30
35
60
50
40
30
20
10
0
EXTVCC = 5V
SHUTDOWN
EXTVCC OPEN
Efficiency vs Load Current
Efficiency vs Input Voltage
Efficiency vs Input Voltage
Load Regulation
VIN – VOUT Dropout Voltage
vs Load Current
ITH Pin Voltage vs Load Current
Input and Shutdown Current
vs Input Voltage
INTVCC Load Regulation
EXTVCC Switch Drop
vs INTVCC Load Current
INTVCC LOAD CURRENT (mA)
0
50
1775 • G08
10
20
30
40
1.0
0.5
0
– 0.5
–1.0
VIN = 15V
TYPICAL PERFOR A CE CHARACTERISTICS



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