Datasheet

LT3021/LT3021-1.2/
LT3021-1.5/LT3021-1.8
4
3021fc
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
J
= 25°C.
SYMBOL CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage
(Notes 5,14)
I
LOAD
= 500mA, T
J
> 0°C
I
LOAD
= 500mA, T
J
< 0°C
0.9
0.9
1.05
1.10
V
V
ADJ Pin Voltage (Notes 4, 5) V
IN
= 1.5V, I
LOAD
= 1mA
1.15V < V
IN
< 10V, 1mA < I
LOAD
< 500mA l
196
193
200
200
204
206
mV
mV
Regulated Output Voltage
(Note 4)
LT3021-1.2 V
IN
= 1.5V, I
LOAD
= 1mA
1.5V < V
IN
< 10V, 1mA < I
LOAD
< 500mA
l
1.176
1.157
1.200
1.200
1.224
1.236
V
V
LT3021-1.5 V
IN
= 1.8V, I
LOAD
= 1mA
1.8V < V
IN
< 10V, 1mA < I
LOAD
< 500mA
l
1.470
1.447
1.500
1.500
1.530
1.545
V
V
LT3021-1.8 V
IN
= 2.1V, I
LOAD
= 1mA
2.1V < V
IN
< 10V, 1mA < I
LOAD
< 500mA
l
1.764
1.737
1.800
1.800
1.836
1.854
V
V
Line Regulation (Note 6) LT3021 ΔV
IN
= 1.15V to 10V, I
LOAD
= 1mA
LT3021-1.2 ΔV
IN
= 1.5V to 10V, I
LOAD
= 1mA
LT3021-1.5 ΔV
IN
= 1.8V to 10V, I
LOAD
= 1mA
LT3021-1.8 ΔV
IN
= 2.1V to 10V, I
LOAD
= 1mA
l
l
l
l
–1.75
–10.5
–13
–15.8
0
0
0
0
+1.75
10.5
13
15.8
mV
mV
mV
mV
Load Regulation (Note 6) LT3021 V
IN
= 1.15V, ΔI
LOAD
= 1mA to 500mA
LT3021-1.2 V
IN
= 1.5V, ΔI
LOAD
= 1mA to 500mA
LT3021-1.5 V
IN
= 1.8V, ΔI
LOAD
= 1mA to 500mA
LT3021-1.8 V
IN
= 2.1V, ΔI
LOAD
= 1mA to 500mA
–2
–6
–7.5
–9
0.4
1
1.5
2
2
6
7.5
9
mV
mV
mV
mV
Dropout Voltage (Notes 7, 12) I
LOAD
= 10mA
I
LOAD
= 10mA
l
45 75
110
mV
mV
I
LOAD
= 500mA
I
LOAD
= 500mA l
155 190
285
mV
mV
GND Pin Current
V
IN
= V
OUT(NOMINAL)
+ 0.4V
(Notes 8, 12)
I
LOAD
= 0mA
I
LOAD
= 10mA
I
LOAD
= 100mA
I
LOAD
= 500mA
l
l
110
920
2.25
6.20
250
10
μA
μA
mA
mA
Output Voltage Noise C
OUT
= 4.7μF, I
LOAD
= 500mA, BW = 10Hz to 100kHz, V
OUT
= 1.2V 300 μV
RMS
ADJ Pin Bias Current V
ADJ
= 0.2V, V
IN
= 1.2V (Notes 6, 9) 20 50 nA
Shutdown Threshold V
OUT
= Off to On
V
OUT
= On to Off
l
l
0.25
0.61
0.61
0.9 V
V
SHDN Pin Current (Note 10) V
SHDN
= 0V, V
IN
= 10V
V
SHDN
= 10V, V
IN
= 10V
l
l
3
±1
9.5
μA
μA
Quiescent Current in Shutdown V
IN
= 6V, V
SHDN
= 0V 3 9 μA
Ripple Rejection (Note 6) LT3021 V
IN
– V
OUT
= 1V, V
RIP
= 0.5V
P-P
, f
RIPPLE
= 120Hz,
I
LOAD
= 500mA
70 dB
LT3021-1.2 V
IN
– V
OUT
= 1V, V
RIPPLE
= 0.5V
P-P
, f
RIPPLE
= 120Hz,
I
LOAD
= 500mA
60 dB
LT3021-1.5 V
IN
– V
OUT
= 1V, V
RIPPLE
= 0.5V
P-P
, f
RIPPLE
= 120Hz,
I
LOAD
= 500mA
58 dB
LT3021-1.8 V
IN
– V
OUT
= 1V, V
RIPPLE
= 0.5V
P-P
, f
RIPPLE
= 120Hz,
I
LOAD
= 500mA
56 dB
Current Limit (Note 12) V
IN
= 10V, V
OUT
= 0V
V
IN
= V
OUT(NOMINAL)
+ 0.5V, ΔV
OUT
= –5%
l
550
1.8 A
mA
Input Reverse Leakage Current V
IN
= –10V, V
OUT
= 0V 1 20 μA
Reverse Output Current
(Notes 11, 13)
LT3021 V
OUT
= 1.2V, V
IN
= 0V
LT3021-1.2 V
OUT
= 1.2V, V
IN
= 0V
LT3021-1.5 V
OUT
= 1.5V, V
IN
= 0V
LT3021-1.8 V
OUT
= 1.8V, V
IN
= 0V
0.5
10
10
10
5
15
15
15
μA
μA
μA
μA
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