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LTC1474 Fiches technique(PDF) 4 Page - Linear Technology

No de pièce LTC1474
Description  Low Quiescent Current High Efficiency Step-Down Converters
Download  20 Pages
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Fabricant  LINER [Linear Technology]
Site Internet  http://www.linear.com
Logo LINER - Linear Technology

LTC1474 Fiches technique(HTML) 4 Page - Linear Technology

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4
LTC1474/LTC1475
TYPICAL PERFORMANCE CHARACTERISTICS
Current Trip Threshold vs
Temperature
Switch Resistance vs
Input Voltage
Supply Current in Shutdown
TEMPERATURE (
°C)
0
80
1474/75 G04
20
40
60
500
400
300
200
100
0
VIN = 10V
RSENSE = 0Ω
RSENSE = 1.1Ω
INPUT VOLTAGE (V)
0
20
1474/75 G05
5
10
15
5
4
3
2
1
0
T = 70
°C
T = 25
°C
INPUT VOLTAGE (V)
0
20
1474/75 G06
5
10
15
10.0
7.5
5.0
2.5
0
Switch Leakage Current vs
Temperature
VIN DC Supply Current
Off-Time vs Output Voltage
% OF REGULATED OUTPUT VOLTAGE (%)
0
100
1474/75 G09
20
40
60
80
80
60
40
20
0
VIN = 10V
INPUT VOLTAGE (V)
0
4
8
16
20
1474/75 G08
12
120
100
80
60
40
20
0
ACTIVE MODE
SLEEP MODE
TEMPERATURE (
°C)
0
1474/75 G07
40
60
80
100
1.0
0.8
0.6
0.4
0.2
0
20
VIN = 18V
Efficiency vs Input Voltage
Line Regulation
Load Regulation
INPUT VOLTAGE (V)
0
4
8
16
1474/75 G01
12
100
95
90
85
80
75
70
ILOAD = 25mA
ILOAD = 200mA
FIGURE 1 CIRCUIT
L: CDRH73-101
ILOAD = 1mA
INPUT VOLTAGE (V)
0
4
8
16
1474/75 G02
12
40
30
20
10
0
–10
–20
FIGURE 1 CIRCUIT
ILOAD = 100mA
RSENSE = 0.33Ω
RSENSE = 0Ω
LOAD CURRENT (mA)
0
40
30
20
10
0
–10
–20
–30
1474/75 G03
100
250
50
150
200
300
FIGURE 1 CIRCUIT
VIN = 15V
VIN = 10V
VIN = 5V


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