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LT1576CS8-5 Datasheet(PDF) 4 Page - Linear Technology

Part # LT1576CS8-5
Description  1.5A, 200kHz Step-Down Switching Regulator
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1576CS8-5 Datasheet(HTML) 4 Page - Linear Technology

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4
LT1576/LT1576-5
TYPICAL PERFORMANCE CHARACTERISTICS
JUNCTION TEMPERATURE (
°C)
–50
4
3
2
1
0
100
1576 G04
–25
0
25
50
75
125
AT 2.44V STANDBY THRESHOLD
(CURRENT FLOWS OUT OF PIN)
Shutdown Pin Bias Current
JUNCTION TEMPERATURE (
°C)
–50
180
160
140
120
100
80
60
40
20
0
100
1576 G05
–25
0
25
50
75
125
CURRENT REQUIRED TO FORCE
SHUTDOWN (FLOWS OUT OF PIN).
AFTER SHUTDOWN, CURRENT
DROPS TO A FEW
µA
Shutdown Pin Bias Current
JUNCTION TEMPERATURE (
°C)
–50
100
1576 G06
050
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
–25
25
75
125
START-UP
SHUTDOWN
Shutdown Supply Current
INPUT VOLTAGE (V)
0
25
20
15
10
5
0
20
1576 G08
5
10
15
25
VSHDN = 0V
FREQUENCY (Hz)
2000
1500
1000
500
0
–500
200
150
100
50
0
–50
10
1k
10k
1M
1576 G09
100
100k
GAIN
PHASE
ERROR AMPLIFIER EQUIVALENT CIRCUIT
ROUT
570k
COUT
2.4pF
VC
RLOAD = 50Ω
VFB 1 × 10
–3
)
(
Error Amplifier Transconductance
JUNCTION TEMPERATURE (
°C)
–50
2.46
2.45
2.44
2.43
2.42
2.41
2.40
25
75
1576 G07
–25
0
50
100
125
ON
STANDBY
Shutdown Thresholds
Standby Thresholds
Switch Drop
JUNCTION TEMPERATURE (
°C)
–50
1.23
1.22
1.21
1.20
1.19
100
1576 G03
–25
0
25
50
75
125
SWITCH CURRENT (A)
0
0.5
0.4
0.3
0.2
0.1
0
0.25
0.50
0.75
1.00
1576 G01
1.25
1.50
125
°C
–20
°C
25
°C
Feedback Pin Voltage
Switch Peak Current Limit
DUTY CYCLE (%)
0
2.5
2.0
1.5
1.0
0.5
0
80
1576 G02
20
40
60
100
TYPICAL
MINIMUM


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