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LT1572CS Datasheet(PDF) 6 Page - Linear Technology

No. de pieza LT1572CS
Descripción Electrónicos  100kHz, 1.25A Switching Regulator with Catch Diode
PDF  12 Pages
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Fabricante Electrónico  LINER [Linear Technology]
Página de inicio  http://www.linear.com
Logo LINER - Linear Technology

LT1572CS Datasheet(HTML) 6 Page - Linear Technology

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6
LT1572
CC
HARA TERISTICS
A
TYPICALPERFOR
CE
Shutdown Thresholds
Isolated Mode Flyback Reference
Voltage
TEMPERATURE (
°C)
1572 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
1572 G17
–50
0
75 100 125
2.2
2.0
1.8
1.6
1.4
1.2
1.0
TEMPERATURE (
°C)
1572 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
Flyback Blanking Time
Transconductance of Error
Amplifier
Normal/Flyback Mode Threshold on
Feedback Pin
FREQUENCY (Hz)
1k
7000
6000
5000
4000
3000
2000
1000
0
–1000
10k
100k
1572 G19
1M
10M
–30
0
30
60
90
120
150
180
210
θ
gm
TEMPERATURE (
°C)
–50
500
490
480
470
460
450
440
430
420
410
400
0
50
75
1572 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)



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