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LT1171HV Datasheet(PDF) 5 Page - Linear Technology

Part # LT1171HV
Description  Available in MiniDiP, TO-220, and TO-3 Packages
Download  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1171HV Datasheet(HTML) 5 Page - Linear Technology

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5
LT1072
1072fc
Driver Current* vs Switch Current
Supply Current vs Input Voltage*
Supply Current vs Supply Voltage
(Shutdown Mode)
Normal/Flyback Mode Threshold
on Feedback Pin
Shutdown Mode Supply Current
Error Amplifier Transconductance
Shutdown Thresholds
Idle Supply Current vs
Temperature
Feedback Pin Clamp Voltage
SWITCH CURRENT (A)
0
*AVERAGE LT1072 POWER SUPPLY CURRENT IS
FOUND BY MULTIPLYING DRIVER CURRENT BY
DUTY CYCLE, THEN ADDING QUIESCENT CURRENT
80
70
60
50
40
30
20
10
0
1.6
LT1072 • TPC10
0.4
0.8
1.2
2
1.4
0.2
0.6
1
1.8
*UNDER VERY LOW OUTPUT CURRENT CONDITIONS,
DUTY CYCLE FOR MOST CIRCUITS WILL APPROACH
10% OR LESS
INPUT VOLTAGE (V)
0
5
7
9
11
10
20
30
40
LT1072 • TPC11
50
13
15
6
8
10
12
14
60
TJ = 25°C
NOTE THAT THIS CURRENT DOES NOT
INCLUDE DRIVER CURRENT, WHICH IS
A FUNCTION OF LOAD CURRENT AND
DUTY CYCLE.
90% DUTY CYCLE
50% DUTY CYCLE
10% DUTY CYCLE
0% DUTY CYCLE
SUPPLY VOLTAGE (V)
0
60
80
100
30
50
LT1072 • TPC12
40
20
0
10
20
40
120
140
160
60
TJ = 25°C
VC = 50mV
VC = 0V
TEMPERATURE (°C)
–50
400
410
430
440
450
500
470
0
50
75
LT1072 • TPC13
420
480
490
460
–4
–6
–10
–12
–14
–24
–18
–8
–20
–22
–16
–25
25
100 125
150
FEEDBACK PIN VOLTAGE
(AT THRESHOLD)
FEEDBACK PIN CURRENT
(AT THRESHOLD)
VC PIN VOLTAGE (mV)
0
120
160
200
80
LT1072 • TPC14
80
40
100
140
180
60
20
0
20
10
40
30
60 70
90
50
100
TJ = 150°C
–55°C ≤ TJ ≤ 125°C
TEMPERATURE (C°)
–75
0
500
1500
2000
2500
5000
3500
–25
25
50
150
LT1072 • TPC15
1000
4000
4500
3000
–50
0
75 100 125
Gm = ∆
I
∆V
(VC PIN)
(FB PIN)
TEMPERATURE (°C)
–75
200
250
300
125
LT1072 • TPC16
150
100
0
–25
25
75
–50
150
050
100
50
400
350
–200
–250
–300
–150
–100
0
–50
–400
–350
CURRENT (OUT OF VC PIN)
VOLTAGE
VC VOLTAGE IS REDUCED UNTIL
REGULATOR CURRENT DROPS
BELOW 300µA
TEMPERATURE (°C)
–75
1
2
4
5
6
11
8
–25
25
50
150
LT1072 • TPC17
3
9
10
7
–50
0
75 100 125
VC = 0.6V
VSUPPLY = 60V
VSUPPLY = 3V
FEEDBACK CURRENT (mA)
0
300
400
500
0.8
LT1072 • TPC18
200
100
250
350
450
150
50
0
0.2
0.1
0.4
0.3
0.6 0.7
0.9
0.5
1
–55°C
25°C
150°C
TYPICAL PERFOR A CE CHARACTERISTICS


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