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LT1933 Arkusz danych(PDF) 3 Page - Linear Technology

Numer części LT1933
Szczegółowy opis  600mA, 500kHz Step-Down Switching Regulator in SOT-23
PDF  16 Pages
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Producent  LINER [Linear Technology]
Strona internetowa  http://www.linear.com
Logo LINER - Linear Technology

LT1933 Arkusz danych(HTML) 3 Page - Linear Technology

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LT1933
1933f
TYPICAL PERFOR A CE CHARACTERISTICS
Efficiency, VOUT = 5V
Efficiency, VOUT = 3.3V
Switch Current Limit
Maximum Load Current
Maximum Load Current
Switch Voltage Drop
Feedback Voltage
Undervoltage Lockout
Switching Frequency
TEMPERATURE (°C)
–50
1.260
1.255
1.250
1.240
1.230
1.245
1.235
–25
0
25
1933 G07
50
75
100
125
TEMPERATURE (°C)
–50
3.8
3.6
3.4
3.2
3.0
–25
0
25
1933 G08
50
75
100
125
TEMPERATURE (°C)
–50
600
550
500
450
400
–25
0
25
1933 G09
50
75
100
125
INPUT VOLTAGE (V)
0
600
700
20
1933 G04
500
400
5
10
15
30
25
800
L = 22µH
L = 33µH
TA = 25°C
VOUT = 5V
INPUT VOLTAGE (V)
0
600
700
20
1933 G05
500
400
5
10
15
30
25
800
L = 22µH
L = 15µH
TA = 25°C
VOUT = 3.3V
LOAD CURRENT (mA)
0
80
90
100
300
400
1933 G01
70
100
200
600
500
60
VIN = 24V
VIN = 12V
TA = 25°C
VOUT = 5V
D1 = MBRM140
L1 = Toko D53LCB 33µH
LOAD CURRENT (mA)
0
80
90
100
300
400
1933 G02
70
100
200
600
500
60
VIN = 24V
VIN = 12V
VIN = 5V
TA = 25°C
VOUT = 3.3V
D1 = MBRM140
L1 = Toko D53LCB 22µH
DUTY CYCLE (%)
0
600
800
1200
1000
80
1933 G03
400
200
0
20
40
60
100
MINIMUM
TYPICAL
TA = 25°C
SWITCH CURRENT (A)
0
0
100
200
300
400
600
500
0.2
0.4
1933 G06
0.6
0.1
0.3
0.5
TA = 85°C
TA = 25°C
TA = –40°C



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