LT1072CN8 Linear Technology, LT1072CN8 Datasheet - Page 4

• Manufacturer Part Number: LT1072CN8
• Description: IC SWTCHNG REG 1.25A HI-EFF 8DIP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck), Step-Up (Boost), Cuk, Flyback, Forward Converterr

Specifications of LT1072CN8

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.25 ~ 40 V
• Current - Output: 1.25A
• Frequency - Switching: 40kHz
• Voltage - Input: 3 ~ 60 V
• Operating Temperature: 0°C ~ 100°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

LT1072
4
TYPICAL PERFOR A CE CHARACTERISTICS
– 2
–3
– 4
– 5
2.7
2.5
2.3
–1
2.9
2.8
2.6
2.4
5
4
3
2
1
0
4
3
2
1
0
–75
0
Switch Current Limit vs Duty Cycle
0
Minimum Input Voltage
Line Regulation
T
–50
10
J
SWITCH CURRENT = 0A
= – 55°C
10
20
–25
125°C
–55°C
30
INPUT VOLTAGE (V)
TEMPERATURE (°C)
20
DUTY CYCLE (%)
0
40
SWITCH CURRENT = 1.25A
25
30
50
50
60
25°C
T
J
40
75 100 125
= 150°C
70
W
80
LT1072 • TPC07
LT1072 • TPC01
LT1072 • TPC04
50
90
U
100
150
60
1.248
1.246
1.244
1.242
1.240
1.238
1.236
1.234
1.250
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
94
92
90
96
95
93
91
0
–75
–75
0
Maximum Duty Cycle
Switch Saturation Voltage
Reference Voltage and Switching
Frequency vs Temperature
–50
–50
0.25
JUNCTION TEMPERATURE (°C)
–25
–25
0.5
REFERENCE VOLTAGE
SWITCH CURRENT (A)
TEMPERATURE (°C)
0
0
0.75
25
SWITCHING FREQUENCY
25
1
50
50
100°C
1.25
75 100 125
75
1.5
150°C
100
LT1072 • TPC05
LT1072 • TPC02
LT1072 • TPC08
1.75
–55°C
125
25°C
150
150
2
39
37
34
42
41
40
38
36
35
700
600
500
400
300
200
100
800
1.8
1.4
1.0
2.2
2.0
1.6
1.2
20
22
21
19
18
17
16
15
23
0
–75
–75
–75
Flyback Blanking Time
Isolated Mode Flyback Reference
Voltage
Feedback Bias Current vs
Temperature
–50
–50
–50
JUNCTION TEMPERATURE (°C)
–25
–25
–25
TEMPERATURE (C°)
TEMPERATURE (°C)
0
0
0
R
R
R
FEEDBACK
FEEDBACK
FEEDBACK
25
25
25
50
50
50
= 500Ω
= 1kΩ
= 10kΩ
75 100 125
75
75
100
100
LT1072 • TPC06
LT1072 • TPC03
LT1072 • TPC09
125
125
1072fc
150
150
150