Datasheet

LT3008 Series
9
3008fc
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, unless otherwise noted.
SHDN Pin Input Current SHDN Pin Input Current
0
0.8
1.8
2
10 20 30
0.4
1.4
0.6
1.6
0.2
0
1.2
1
515 4525 35 40
3008 G22
SHDN PIN VOLTAGE (V)
SHDN PIN INPUT CURRENT (µA)
–50
0.8
2
0
25
75
0.4
1.6
0.6
1.8
0.2
0
1.4
1
1.2
–25
100
150
50
125
3008 G23
TEMPERATURE (°C)
SHDN PIN INPUT CURRENT (µA)
V
SHDN
= 45V
Current Limit
Reverse-Output Current
40
100
20
70
80
30
90
10
0
60
50
3008 G24
TEMPERATURE (°C)
CURRENT LIMIT (mA)
–50 0 75
–25
25
150
50
100
125
V
IN
= 2V
V
IN
= 45V
3008 G25
TEMPERATURE (°C)
REVERSE OUTPUT CURRENT (µA)
20
50
10
35
40
15
45
5
0
30
25
–50 0 75
–25
25
150
50
100
125
OUT
ADJ
OUT = ADJ = 1.2V
IN = SHDN = GND
Input Ripple Rejection
0
10
30
20
40
50
70
60
90
80
FREQUENCY (Hz)
3008 G26
10 100 1000 10000010000 1000000
INPUT RIPPLE REJECTION (dB)
V
IN
= 2.1V + 50mV
RMS
V
OUT
= 600mV
I
LOAD
= 20mA
2.2µF
10µF
Input Ripple Rejection
INPUT RIPPLE REJECTION (dB)
60
80
30
40
50
70
20
10
0
3008 G27
TEMPERATURE (°C)
–50 0 75
–25
25
150
50
100
125
V
IN
= V
OUT
(NOMINAL) + 2V + 0.5V
P-P
RIPPLE AT f = 120Hz
I
LOAD
= 20mA
GND Pin Current
LT3008-5
0
200
450
500
2
4
6
100
350
150
400
50
0
300
250
1
3
8
10
5
7
9
3008 G19
INPUT VOLTAGE (V)
GND PIN CURRENT (µA)
R
L
= 250, I
L
= 20mA
R
L
= 500, I
L
= 10mA
R
L
= 5k, I
L
= 1mA
R
L
= 50k, I
L
= 100µA
GND Pin Current vs I
LOAD
1
10
100
1000
LOAD (mA)
GND CURRENT (µA)
3008 G20
0.001 0.01 0.1 1 10 100
V
IN
= 3.8V
V
OUT
= 3.3V
–50
0.6
1.4
1.5
075
0.3
1.2
1.1
0.4
0.5
1.3
0.1
0.2
0
1
0.9
0.8
0.7
–25
25
150
50
100
125
3008 G21
TEMPERATURE (°C)
SHDN PIN THRESHOLD (V)
OFF TO ON
ON TO OFF
SHDN Pin Thresholds