LT1521/LT1521-3
LT1521-3.3/LT1521-5
The
q
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C.
PARAMETER
Regulated Output Voltage
(Note 4)
CONDITIONS
LT1521-3
V
IN
= 3.5V, I
OUT
= 1mA, T
J
= 25°C
4V < V
IN
< 20V, 1mA < I
OUT
< 300mA
LT1521-3.3
V
IN
= 3.8V, I
OUT
= 1mA, T
J
= 25°C
4.3V < V
IN
< 20V, 1mA < I
OUT
< 300mA
LT1521-5
V
IN
= 5.5V, I
OUT
= 1mA, T
J
= 25°C
6V < V
IN
< 20V, 1mA < I
OUT
< 300mA
LT1521 (Note 5) V
IN
= 4.3V, I
OUT
= 1mA, T
J
= 25°C
4.8V < V
IN
< 20V, 1mA < I
OUT
< 300mA
LT1521-3
∆V
IN
= 4.5 to 20V, I
OUT
= 1mA
LT1521-3.3
∆V
IN
= 4.8 to 20V, I
OUT
= 1mA
LT1521-5
∆V
IN
= 5.5 to 20V, I
OUT
= 1mA
LT1521 (Note 5)
∆V
IN
= 4.3 to 20V, I
OUT
= 1mA
LT1521-3
∆I
LOAD
= 1mA to 300mA, T
J
≤
25°C
LT1521-3.3
∆I
LOAD
= 1mA to 300mA, T
J
≤
25°C
LT1521-5
∆I
LOAD
= 1mA to 300mA, T
J
≤
25°C
LT1521 (Note 5)
∆I
LOAD
= 1mA to 300mA, T
J
≤
25°C
LT1521-3
∆I
LOAD
= 1mA to 300mA, T
J
>25°C
LT1521-3.3
∆I
LOAD
= 1mA to 300mA, T
J
> 25°C
LT1521-5
∆I
LOAD
= 1mA to 300mA, T
J
> 25°C
LT1521 (Note 5)
∆I
LOAD
= 1mA to 300mA, T
J
> 25°C
I
LOAD
= 1mA, T
J
= 25°C
I
LOAD
= 1mA
I
LOAD
= 50mA, T
J
= 25°C
I
LOAD
= 50mA
I
LOAD
= 100mA, T
J
= 25°C
I
LOAD
= 100mA
I
LOAD
= 150mA, T
J
= 25°C
I
LOAD
= 150mA
I
LOAD
= 300mA, T
J
= 25°C
I
LOAD
= 300mA
I
LOAD
= 0mA
I
LOAD
= 1mA
I
LOAD
= 10mA
I
LOAD
= 50mA
I
LOAD
= 100mA
I
LOAD
= 150mA
I
LOAD
= 300mA
T
J
= 25°C
V
OUT
= Off to On
V
OUT
= On to Off
V
SHDN
= 0V
V
IN
= V
OUT
(NOMINAL) + 1V, V
SHDN
= 0V
V
IN
– V
OUT
= 1V(Avg), V
RIPPLE
= 0.5V
P–P
,
f
RIPPLE
= 120Hz, I
LOAD
= 150mA
V
IN
– V
OUT
= 7V, T
J
= 25°C
V
IN
= V
OUT
(NOMINAL) + 1.5V,
∆V
OUT
= – 0.1V
MIN
2.950
2.900
3.250
3.200
4.925
4.850
3.695
3.640
TYP
3.000
3.000
3.300
3.300
5.000
5.000
3.750
3.750
1.5
1.5
1.5
1.5
– 20
– 20
– 25
– 20
– 20
– 20
– 25
– 20
130
290
q
ELECTRICAL CHARACTERISTICS
q
q
q
q
q
q
q
q
Line Regulation
Load Regulation
Dropout Voltage (Note 6)
q
350
q
400
q
500
q
q
q
q
q
q
q
q
q
q
q
q
Ground Pin Current (Note 7)
Adjust Pin Bias Current (Notes 5, 8)
Shutdown Threshold
Shutdown Pin Current (Note 9)
Quiescent Current in Shutdown (Note 10)
Ripple Rejection
Current Limit
0.25
50
12
65
300
0.8
1.4
2.2
6.5
50
1.20
0.75
2.0
6
58
400
400
MAX
3.050
3.100
3.350
3.400
5.075
5.150
3.805
3.860
20
20
20
20
– 30
– 30
– 45
– 30
– 55
– 55
– 75
– 55
170
250
350
450
420
550
470
600
600
750
25
100
450
1.5
2.5
4.0
12.0
100
2.80
5.0
12
UNITS
V
V
V
V
V
V
V
V
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
µA
µA
µA
mA
mA
mA
mA
nA
V
V
µA
µA
dB
mA
mA
800
q
320
1521335fb
3
LINER [ LINEAR TECHNOLOGY ]
