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LT1171HVC датащи(PDF) 6 Page - Linear Technology

номер детали LT1171HVC
подробное описание детали  100kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators
PDF  20 Pages
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производитель  LINER [Linear Technology]
домашняя страница  http://www.linear.com
Logo LINER - Linear Technology

LT1171HVC датащи(HTML) 6 Page - Linear Technology

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LT1170/LT1171/LT1172
TEMPERATURE (
°C)
1170/1/2 G16
400
350
300
250
200
150
100
50
0
–75
–25
25
50
150
–50
0
75 100 125
– 400
– 350
– 300
– 250
– 200
– 150
–100
–50
0
CURRENT (OUT OF VC PIN)
VOLTAGE
VC VOLTAGE IS REDUCED UNTIL
REGULATOR CURRENT DROPS
BELOW 300
µA
JUNCTION TEMPERATURE (
°C)
–75
–25
25
50
150
1170/1/2 G17
–50
0
75 100 125
2.2
2.0
1.8
1.6
1.4
1.2
1.0
Isolated Mode Flyback
Reference Voltage
TEMPERATURE (
°C)
1170/1/2 G18
23
22
21
20
19
18
17
16
15
–75
–25
25
50
150
–50
0
75 100 125
RFB = 500Ω
RFB = 1k
RFB = 10k
Normal/Flyback Mode Threshold on
Feedback Pin
TEMPERATURE (
°C)
–50
500
490
480
470
460
450
440
430
420
410
400
0
50
75
1170/1/2 G20
–25
25
100 125
150
–24
–22
–20
–18
–16
–14
–12
–10
–8
–6
–4
FEEDBACK PIN CURRENT
(AT THRESHOLD)
FEEDBACK PIN VOLTAGE
(AT THRESHOLD)
Flyback Blanking Time
Shutdown Thresholds
Transconductance of Error
Amplifier
FREQUENCY (Hz)
1k
7000
6000
5000
4000
3000
2000
1000
0
–1000
10k
100k
1170/1/2 G19
1M
10M
–30
0
30
60
90
120
150
180
210
θ
gm
TEMPERATURE (
°C)
11
10
9
8
7
6
5
4
3
2
1
1170/1/2 G13
–75
–25
25
50
150
–50
0
75 100 125
VSUPPLY = 60V
VSUPPLY = 3V
VC = 0.6V
Feedback Pin Clamp Voltage
Switch “Off” Characteristics
Idle Supply Current vs
Temperature
FEEDBACK CURRENT (mA)
0
500
450
400
350
300
250
200
150
100
50
0
0.4
1170/1/2 G14
0.1 0.2 0.3
0.5 0.6 0.7 0.8 0.9 1.0
–55
°C
25
°C
150
°C
SWITCH VOLTAGE (V)
0
1000
900
800
700
600
500
400
300
200
100
0
40
1170/1/2 G15
10
20 30
50 60 70 80 90 100
VSUPPLY
= 55V
VSUPPLY
= 3V
VSUPPLY
= 15V
VSUPPLY
= 40V
TYPICAL PERFOR A CE CHARACTERISTICS



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