lt1579cs8-trpbf Linear Technology Corporation, lt1579cs8-trpbf Datasheet - Page 3

• Manufacturer Part Number: lt1579cs8-trpbf
• Description: 300ma Dual Input Smart Battery Backup Regulator
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
PARAMETER
Regulated Output
Voltage (Note 1)
Adjust Pin Voltage
Line Regulation
Load Regulation
Dropout Voltage
(Notes 3, 4)
V
V
Ground Pin Current
(Note 5)
V
V
Standby Current
(Note 6) I
Shutdown Threshold
Shutdown Pin Current
(Note 7)
Quiescent Current in
Shutdown (Note 9)
IN1
OUT(NOMINAL)
IN1
OUT(NOMINAL)
= V
= V
IN2
IN2
LOAD
=
=
+ 1V
= 0mA
CONDITIONS
LT1579-3 V
LT1579-3.3 V
LT1579-5 V
LT1579
LT1579-3
LT1579-3.3 V
LT1579-5
LT1579
LT1579-3 V
LT1579-3.3 V
LT1579-5 V
LT1579
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
V
V
V
I
I
I
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
VIN2
VIN1
VIN1
VIN2
SRC
OUT
OUT
SHDN
: V
: V
: V
: V
: V
= Off to On
= On to Off
= 10mA, T
= 10mA
= 50mA, T
= 50mA
= 150mA, T
= 150mA
= 300mA, T
= 300mA
= 0mA, T
= 0mA
= 1mA, T
= 1mA
= 50mA
= 150mA
= 300mA
= 0V
IN1
IN1
IN1
IN1
IN1
= V
= 20V, V
= V
= 20V, V
= 6V, V
4V < V
4.3V < V
6V < V
V
3.7V < V
V
V
V
V
V
IN2
IN1
IN1
IN1
IN1
V
V
V
IN1
IN1
IN1
IN1
IN1
IN1
IN1
IN1
OUT(NOMINAL)
J
J
IN1
IN1
IN1
IN1
J
J
= 25 C
= 25 C
= 20V, V
= V
= V
= V
= V
= V
= V
= V
= V
= V
= V
= V
= V
J
J
= 25 C
= 25 C
IN2
= 3.5V to 20V, V
= 3.8V to 20V, V
= 5.5V to 20V, V
= 3.2V to 20V, V
IN1
IN1
= 25 C
= 25 C
IN2
IN2
IN2
IN2
IN2
IN2
IN2
IN2
IN2
IN2
IN2
IN2
IN2
IN2
IN1
IN1
= 20V, V
< 20V, 4V < V
< 20V, 6V < V
= V
= 6V, V
= 3.5V, I
= 3.8V, I
= 5.5V, I
= 3.2V, I
= 4V, I
= 4V, I
= 4.3V, I
= 4.3V, I
= 6V, I
= 6V, I
= 3.7V, I
= 3.7V, I
< 20V, 4.3V < V
< 20V, 3.7V < V
SHDN
OUT(NOMINAL)
+ 0.5V, V
SHDN
SHDN
= 0V
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
= 0V
= 0V
IN2
IN2
IN2
IN2
IN2
IN2
IN2
= 1mA to 300mA, T
= 1mA to 300mA
= 1mA to 300mA, T
= 1mA to 300mA
= 1mA, T
= 1mA, T
= 1mA, T
= 1mA, T
= 1mA to 300mA, T
= 1mA to 300mA
= 1mA to 300mA, T
= 1mA to 300mA
< 20V, 1mA < I
< 20V, 1mA < I
+ 0.5V, V
IN2
IN2
= 20V, V
= 3.5V to 20V, I
= 3.8V to 20V, I
= 5.5V to 20V, I
= 3.2V to 20V, I
< 20V, 1mA < I
< 20V, 1mA < I
J
J
J
J
= 25 C
= 25 C
= 25 C
= 25 C (Note 2)
SS
SS
= Open (HI)
= 0V
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
J
J
LOAD
LOAD
= 25 C
= 25 C
J
J
< 300mA
< 300mA
= 25 C
= 25 C (Note 2)
= 1mA
= 1mA
= 1mA
= 1mA (Note 2)
< 300mA
< 300mA
2.950
2.900
3.250
3.200
4.925
4.850
1.475
1.450
0.25
MIN
3.000
3.000
3.300
3.300
5.000
5.000
1.500
1.500
0.10
0.18
0.25
0.34
0.75
TYP
100
1.5
1.5
1.5
1.5
0.7
5.8
3.3
2.0
0.9
1.3
50
3
3
5
2
2
5
5
3
3.050
3.100
3.350
3.400
5.075
5.150
1.525
1.550
LT1579
MAX
0.28
0.39
0.35
0.45
0.47
0.60
0.60
0.75
100
400
200
500
1.5
7.0
7.0
2.8
10
10
10
10
12
25
12
25
15
35
10
20
12
12
12
4
5
UNITS
3
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mA
mA
mA
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
A
A
A
A
A
A
V
V
A
A
A
A