Datasheet

LT3050 Series
4
3050fa
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. (Note 2)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Dropout Voltage
V
IN
= V
OUT(NOMINAL)
(Notes 5, 6)
I
LOAD
= 1mA
I
LOAD
= 1mA
l
110 150
220
mV
mV
I
LOAD
= 10mA
I
LOAD
= 10mA
l
195 240
340
mV
mV
I
LOAD
= 50mA
I
LOAD
= 50mA
l
280 330
450
mV
mV
I
LOAD
= 100mA
I
LOAD
= 100mA
l
340 400
550
mV
mV
GND Pin Current
V
IN
= V
OUT(NOMINAL)
+ 0.6V (Notes 6, 7, 11)
I
LOAD
= 0mA
I
LOAD
= 1mA
I
LOAD
= 10mA
I
LOAD
= 50mA
I
LOAD
= 100mA
l
l
l
l
l
45
60
175
0.85
2.2
90
160
370
2
5.2
µA
µA
µA
mA
mA
Quiescent Current in Shutdown V
IN
= 12V, V
SHDN
= 0V 0.17 1 µA
ADJ Pin Bias Current (Notes 3, 12) V
IN
= 12V
l
12.5 60 nA
Output Voltage Noise C
OUT
= 10F, I
LOAD
= 100mA, V
OUT
= 600mV,
BW = 10Hz to 100kHz
90 µV
RMS
Output Voltage Noise C
OUT
= 10F, C
BYP
= 0.01F, I
LOAD
= 100mA, V
OUT
= 600mV
BW = 10Hz to 100kHz
30 µV
RMS
Shutdown Threshold V
OUT
= Off to On
V
OUT
= On to Off
l
l
0.3
0.7
0.6
1.5 V
V
SHDN Pin Current (Note 13) V
SHDN
= 0V
V
SHDN
= 45V
l
l
0.9
1
3
µA
µA
Ripple Rejection V
IN
– V
OUT
= 2V, V
RIPPLE
= 0.5V
P-P
,
f
RIPPLE
= 120Hz, I
LOAD
= 100mA
LT3050
LT3050-3.3
LT3050-5
70
55
51
85
70
66
dB
dB
dB
FAULT Pin Logic Low Voltage V
IN
= 2.2V, FAULT Asserted, I
FAULT
= 100A
l
140 250 mV
FAULT Pin Leakage Current FAULT = 5V, FAULT Not Asserted 0.01 1 µA
Input Reverse Leakage Current V
IN
= –45V, V
OUT
= 0
l
300 µA
Reverse Output Current (Note 14) V
OUT
= 1.2V, V
IN
= 0 0.2 10 µA
Internal Current Limit (Note 3) V
IN
= 2.2V or V
OUT(NOMINAL)
+ 0.6V, V
OUT
= 0V, I
MAX
= 0V
V
IN
= 2.2V or V
OUT(NOMINAL)
+ 0.6V, ΔV
OUT
= –5%
l
110
240 mA
External Programmed Current Limit
(Notes 6, 8)
LT3050-3.3
3.9V < V
IN
< 13.3V, R
IMAX
= 2.26k
FAULT Pin Threshold (I
FAULT
)
3.9V < V
IN
< 13.3V, R
IMAX
= 1.5k
FAULT Pin Threshold (I
FAULT
)
3.9V < V
IN
< 13.3V, R
IMAX
= 1.15k
FAULT Pin Threshold (I
FAULT
)
LT3050, LT3050-5
5.6V < V
IN
< 15V, R
IMAX
= 2.26k
FAULT Pin Threshold (I
FAULT
)
5.6V < V
IN
< 15V, R
IMAX
= 1.5k
FAULT Pin Threshold (I
FAULT
)
5.6V < V
IN
< 15V, R
IMAX
= 1.15k
FAULT Pin Threshold (I
FAULT
)
l
l
l
l
l
l
48.8
73.6
96
47.8
72.1
94.4
51.4
77.5
101
50.4
75.9
99.3
54
81.4
106
52.9
79.7
104.3
mA
mA
mA
mA
mA
mA