LT1129/LT1129-3.3/LT1129-5
TYPICAL PERFORMANCE CHARACTERISTICS
Reverse Output Current
30
25
OUTPUT CURRENT (μA)
Current Limit
1.4
1.4
V
OUT
= 0V
SHORT-CIRCUIT CURRENT (A)
SHORT-CIRCUIT CURRENT (A)
Current Limit
1.2
1.0
0.8
0.6
0.4
0.2
0
–50
V
IN
= 7V
V
OUT
= 0V
–25
50
25
0
75
TEMPERATURE (°C)
100
125
V
IN
= 0V
V
OUT
= V
SENSE
= 5V (LT1129-5)
V
OUT
= V
SENSE
= 3.3V (LT1129-3.3)
V
OUT
= V
ADJ
= 3.75V (LT1129)
1.2
1.0
0.8
0.6
0.4
0.2
0
20
15
10
5
0
–50
–25
50
25
0
75
TEMPERATURE (°C)
100
125
0
1
4
3
2
5
INPUT VOLTAGE (V)
6
7
112935 G22
112935 G23
112935 G24
Reverse Output Current
100
90
80
T
J
= 25°C, V
IN
= 0V
V
OUT
= V
SENSE
(LT1129-3.3/LT1129-5)
V
OUT
= V
ADJ
(LT1129)
CURRENT FLOWS
INTO DEVICE
LT1129
70
68
Ripple Rejection
100
(V
IN
– V
OUT
)
AVG
= 1V
V
RIPPLE
= 0.5V
P-P
I
L
= 0.7A
90
80
Ripple Rejection
I
OUT
= 500mA
V
IN
= 6V + 50mV
RMS
RIPPLE
RIPPLE REJECTION (dB)
70
60
50
40
30
20
10
0
0
66
64
62
60
58
56
–50
RIPPLE REJECTION (dB)
OUTPUT CURRENT (μA)
70
60
50
40
30
20
C
OUT
= 47μF
SOLID
TANTALUM
LT1129-3.3
LT1129-5
10
–25
50
25
0
75
TEMPERATURE (°C)
100
125
0
10
100
C
OUT
= 3.3μF
SOLID
TANTALUM
1k
10k
FREQUENCY (Hz)
100k
1M
1
2
3 4 5 6 7 8
OUTPUT VOLTAGE (V)
9
10
112935 G25
112935 G26
112935 G27
Load Regulation
0
OUTPUT VOLTAGE
DEVIATION (V)
LT1129-5
Transient Response
OUTPUT VOLTAGE
DEVIATION (V)
LT1129-5
Transient Response
0.2
0.1
0
–0.1
–0.2
0.7
V
IN
= 6V
C
IN
= 3.3μF
C
OUT
= 47μF
LT1129-3.3
–5
LOAD REGULATION (mV)
0.10
0.05
0
–0.05
–0.10
V
IN
= 6V
C
IN
= 3.3μF
C
OUT
= 3.3μF
–10
–15
–20
–25
–30
–50
LT1129*
LT1129-5
LOAD CURRENT
(A)
V
IN
= V
OUT
(NOMINAL) + 1V
ΔI
LOAD
= 1mA to 700mA
*V
ADJ
= V
OUT
–25
50
25
0
75
TEMPERATURE (°C)
100
125
0.6
0.5
0
50 100 150 200 250 300 350 400 450 500
TIME (μs)
112935 G29
LOAD CURRENT
(A)
0.5
0.3
0.1
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
TIME (ms)
112935 G30
112935 G28
112935ff
8
LINER [ LINEAR TECHNOLOGY ]
