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LT1776IN8 Datasheet(PDF) 4 Page - Linear Technology

Part # LT1776IN8
Description  Wide Input Range, High Efficiency, Step-Down Switching Regulator
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1776IN8 Datasheet(HTML) 4 Page - Linear Technology

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4
LT1776
TYPICAL PERFORMANCE CHARACTERISTICS
Minimum Input Voltage vs
Temperature
TEMPERATURE (
°C)
–50
7.4
7.2
7.0
6.8
6.6
6.4
6.2
6.0
25
75
1776 G01
–25
0
50
100
125
SWITCH CURRENT (mA)
0
1.50
1.25
1.00
0.75
0.50
0.25
0
300
500
1776 G02
100
200
400
600
700
125
°C
–55
°C
25
°C
DUTY CYCLE (%)
0
1000
800
600
400
200
0
80
1776 G03
20
10
30
50
70
90
40
60
100
TA = 25°C
Switch-On Voltage vs
Switch Current
Switch Current Limit vs
Duty Cycle
SHDN Pin Shutdown Threshold
vs Temperature
TEMPERATURE (
°C)
–50
900
800
700
600
500
400
300
200
25
75
LT1776 G04
–25
0
50
100
125
SHDN PIN VOLTAGE (V)
0
5
0
–5
–10
–15
–20
4
1776 G05
1
2
3
5
25
°C
–55
°C
125
°C
SHDN Pin Input Current
vs Voltage
TEMPERATURE (
°C)
–50
1.30
1.28
1.26
1.24
1.22
1.20
25
75
LT1776 G06
–25
0
50
100
125
UPPER THRESHOLD
LOWER THRESHOLD
SHDN Pin Lockout Thresholds
vs Temperature
TEMPERATURE (
°C)
215
210
205
200
195
190
185
1776 G07
–50
25
75
–25
0
50
100
125
Switching Frequency
vs Temperature
Minimum Synchronization Voltage
vs Temperature
Switch Minimum On-Time
vs Temperature
TEMPERATURE (
°C)
2.25
2.00
1.75
1.50
1.25
1.00
0.75
1776 G08
–50
25
75
–25
0
50
100
125
TEMPERATURE (
°C)
600
500
400
300
200
100
0
1776 G09
–50
25
75
–25
0
50
100
125
VIN = 40V
RL = 39Ω
FB =


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