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LT1374HVIS8 Datasheet(PDF) 5 Page - Linear Technology

Part # LT1374HVIS8
Description  4.5A, 500kHz Step-Down Switching Regulator
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1374HVIS8 Datasheet(HTML) 5 Page - Linear Technology

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5
LT1374
1374fb
FEEDBACK PIN VOLTAGE (V)
0
500
400
300
200
100
0
2.0
1374 G10
0.5
1.0
1.5
2.5
SWITCHING
FREQUENCY
FEEDBACK PIN
CURRENT
Frequency Foldback
LOAD CURRENT (mA)
1
5.8
6.0
6.2
6.4
10
100
1000
1374 G12
5.6
5.4
5.2
5.0
MINIMUM
RUNNING
VOLTAGE
MINIMUM
STARTING
VOLTAGE
Minimum Input Voltage
with 5V Output
TEMPERATURE (
°C)
–50
550
540
530
520
510
500
490
480
470
460
450
100
1374 G11
–25
0
25
50
75
125
Switching Frequency
Maximum Load Current
at VOUT = 10V
INPUT VOLTAGE (V)
0
4.5
4.0
3.5
3.0
510
15
20
1374 G13
25
L = 20
µH
L = 10
µH
L = 5
µH
VOUT = 10V
Maximum Load Current
at VOUT = 3.3V
INPUT VOLTAGE (V)
0
4.5
4.0
3.5
3.0
510
15
20
1374 G14
25
L = 20
µH
L = 10
µH
L = 5
µH
VOUT = 3.3V
Maximum Load Current
at VOUT = 5V
INPUT VOLTAGE (V)
0
4.5
4.0
3.5
3.0
510
15
20
1374 G15
25
L = 20
µH
L = 10
µH
L = 5
µH
VOUT = 5V
Shutdown Supply Current
SHUTDOWN VOLTAGE (V)
0
70
60
50
40
30
20
10
0
0.1
0.2
0.3
0.4
1374 G07
VIN = 25V
VIN = 10V
Error Amplifier Transconductance
FREQUENCY (Hz)
3000
2500
2000
1500
1000
500
200
150
100
50
0
–50
100
10k
100k
10M
1374 G09
1k
1M
GAIN
PHASE
ERROR AMPLIFIER EQUIVALENT CIRCUIT
ROUT
200k
COUT
12pF
VC
RLOAD = 50Ω
VFB 2 × 10
–3
)
(
Error Amplifier Transconductance
JUNCTION TEMPERATURE (
°C)
–50
2500
2000
1500
1000
500
0
0
50
75
1374 G08
–25
25
100
125
TYPICAL PERFOR A CE CHARACTERISTICS


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