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LT1579CS Datasheet(PDF) 7 Page - Linear Technology

Part # LT1579CS
Description  300mA Dual Input Smart Battery Backup Regulator
PDF  20 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1579CS Datasheet(HTML) 7 Page - Linear Technology

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LT1579
TYPICAL PERFORMANCE CHARACTERISTICS
Logic Flag Output Voltage
(Output Low)
Logic Flag Output Voltage
(Output Low)
TEMPERATURE (
°C)
–50
0.8
1.0
1.2
25
75
1579 G21
0.6
0.4
–25
0
50
100
125
0.2
0
ISINK = 5mA
ISINK = 20µA
LOGIC FLAG SINK CURRENT
0.2
0.4
0.6
0.5
0.8
1.0
0.1
0.3
0.7
0.9
1
µA10µA
100
µA
1mA
10mA
1579 G20
0
OUTPUT CURRENT (mA)
0
3
4
5
150
250
1579 G37
2
1
0
50
100
200
6
7
8
300
VIN1 = VIN2 = VOUT(NOMINAL) + 1V
Ground Pin Current
Minimum Input Voltage
TEMPERATURE (
°C)
–50
2.0
2.1
2.3
2.4
2.5
3.0
2.7
0
50
75
1579 G14
2.2
2.8
2.9
2.6
–25
25
100
125
Shutdown Pin Threshold
TEMPERATURE (
°C)
–50 – 25
0
0.4
1.0
0
50
75
1579 G15
0.2
0.8
0.6
25
100
125
ILOAD = 1mA
Secondary Select Threshold
(Switch to VIN1)
TEMPERATURE (
°C)
–50
0
0.2
0.6
0.8
1.0
2.0
1.4
0
50
75
1579 G18
0.4
1.6
1.8
1.2
–25
25
100
125
ILOAD = 300mA
ILOAD = 1mA
Secondary Select Threshold
(Switch to VIN2)
TEMPERATURE (
°C)
–50
0
0.2
0.6
0.8
1.0
2.0
1.4
0
50
75
1579 G17
0.4
1.6
1.8
1.2
–25
25
100
125
ILOAD = 1mA
TEMPERATURE (
°C)
–50 – 25
0
1.0
2.5
0
50
75
1579 G16
0.5
2.0
1.5
25
100
125
VSHDN = 0V
Shutdown Pin Current
Secondary Select Pin Current
TEMPERATURE (
°C)
–50
0
0.1
0.3
0.4
0.5
1.0
0.7
0
50
75
1579 G19
0.2
0.8
0.9
0.6
–25
25
100
125
VSS = 0V



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