LT1121-3.3 Linear Technology, LT1121-3.3 Datasheet - Page 6

• Manufacturer Part Number: LT1121-3.3
• Description: Micropower Low Dropout Regulators with Shutdown
• Manufacturer: Linear Technology

LT1121/LT1121-3.3/LT1121-5
TYPICAL PERFOR
6
100
10
30
25
20
15
10
90
80
70
60
50
40
30
20
10
9
8
7
6
5
4
3
2
1
0
5
0
–50
–50
0
Shutdown Pin Current
Reverse Output Current
0
Reverse Output Current
T
V
CURRENT FLOWS
INTO OUTPUT PIN
V
V
V
V
V
J
IN
SHDN
IN
OUT
OUT
OUT
= 25°C
–25
–25
1
= 0V
= 0V
= 5V (LT1121-5)
= 3.3V (LT1121-3.3)
= 3.8V (LT1121)
2
= 0V
0
0
OUTPUT VOLTAGE (V)
TEMPERATURE (°C)
TEMPERATURE (°C)
3
(V
LT1121-3.3
OUT
4
25
25
LT1121
= V
5
50
50
ADJ
LT1121-5
6
)
75
75
7
W
8
100
100
A
1121 G13
1121 G15
1121 G01
9
U
125
125
10
CE
C
HARA TERISTICS
400
350
300
250
200
150
100
50
64
62
60
58
56
54
52
50
20
10
25
15
0
0
–50
5
0
Shutdown Pin Input Current
Current Limit
Ripple Rejection
0
V
OUT
–25
1
1
= 0V
SHUTDOWN PIN VOLTAGE (V)
C
2
0
2
INPUT VOLTAGE (V)
TEMPERATURE (°C)
V
+ 0.5V
I
3
OUT
IN
= V
25
3
= 100mA
4
P-P
OUT
RIPPLE AT f = 120Hz
50
5
4
(NOMINAL) + 1V
6
75
5
7
100
6
1121 G20
1121 G18
8
1121 G28
125
7
9
400
350
300
250
200
150
100
400
350
300
250
200
150
100
100
50
50
90
80
70
60
50
40
30
20
10
0
0
0
–50
–50
10
Current Limit
Ripple Rejection
LT1121
Adjust Pin Bias Current
I
V
V
V
OUT
IN
OUT
IN
–25
–25
= 7V
= 6V + 50mV
= 100mA
100
= 0V
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
FREQUENCY (Hz)
SOLID TANTALUM
1k
RMS
25
25
C
RIPPLE
SOLID TANTALUM
OUT
50
50
C
10k
OUT
= 1 F
75
75
= 47 F
100k
100
100
1121 G25
1121 G19
1121 G26
125
125
1M