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LT1375CS8 Datasheet(PDF) 5 Page - Linear Technology

Part # LT1375CS8
Description  1.5A, 500kHz Step-Down Switching Regulators
PDF  28 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1375CS8 Datasheet(HTML) 5 Page - Linear Technology

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LT1375/LT1376
TYPICAL PERFORMANCE CHARACTERISTICS
TEMPERATURE (
°C)
–50
500
400
300
200
8
4
0
25
75
1375/76 G04
–25
0
50
100
125
CURRENT REQUIRED TO FORCE SHUTDOWN
(FLOWS OUT OF PIN). AFTER SHUTDOWN,
CURRENT DROPS TO A FEW
µA
AT 2.38V STANDBY THRESHOLD
(CURRENT FLOWS OUT OF PIN)
Shutdown Pin Bias Current
JUNCTION TEMPERATURE (
°C)
–50
2500
2000
1500
1000
500
0
0
50
75
1375/76 G02
–25
25
100
125
Error Amplifier Transconductance
FREQUENCY (Hz)
3000
2500
2000
1500
1000
500
200
150
100
50
0
–50
100
10k
100k
10M
1375/76 G03
1k
1M
GAIN
PHASE
ERROR AMPLIFIER EQUIVALENT CIRCUIT
ROUT
200k
COUT
12pF
VC
RLOAD = 50Ω
VFB 2 • 10
–3
)
(
Error Amplifier Transconductance
Frequency Foldback
LOAD CURRENT (mA)
0
8.5
8.0
7.5
7.0
6.5
6.0
5.5
5.0
10
100
1000
1375/76 G12
MINIMUM INPUT VOLTAGE CAN BE
REDUCED BY ADDING A SMALL EXTERNAL
PNP. SEE APPLICATIONS INFORMATION
MINIMUM
VOLTAGE TO
START WITH
STANDARD
CIRCUIT
MINIMUM VOLTAGE
TO RUN WITH
STANDARD CIRCUIT
LT1376 Minimum Input Voltage
with 5V Output
Shutdown Supply Current
INPUT VOLTAGE (V)
0
30
25
20
15
10
5
0
510
15
20
1375/76 G06
25
VSHUTDOWN = 0V
JUNCTION TEMPERATURE (
°C)
–50
2.40
2.36
2.32
0.8
0.4
0
25
75
1375/76 G05
–25
0
50
100
125
STANDBY
START-UP
SHUTDOWN
Standby and Shutdown Thresholds
Shutdown Supply Current
SHUTDOWN VOLTAGE (V)
0
150
125
100
75
50
25
0
0.1
0.2
0.3
0.4
1375/76 G07
0.5
VIN = 25V
VIN = 10V
FEEDBACK PIN VOLTAGE (V)
0
500
400
300
200
100
0
2.0
1375/76 G10
0.5
1.0
1.5
2.5
SWITCHING
FREQUENCY
FEEDBACK PIN
CURRENT
Switching Frequency
JUNCTION TEMPERATURE (
°C)
–50
600
550
500
450
400
100
1375/76 G11
–25
0
25
50
75
125



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