Datasheet

3
LT1120A
1120afa
TEMPERATURE (°C)
–50
0
SHORT-CIRCUIT CURRENT (mA)
350
150
1120A G03
300
250
200
150
100
50
110
–10
30 70
REGULATOR OUTPUT CURRENT (mA)
0.1
0.01
SUPPLY CURRENT (mA)
0.1
100
1 1000
1120A G02
10
1
100
10
Note 1: Absolute Maximum Ratings are those values beyond which the life
to the device may be impaired.
Regulator Load Regulation Supply Current
Regulator Short-Circuit Current
OUTPUT CURRENT (mA)
0.1
–0.3
OUTPUT VOLTAGE CHANGE (%)
0.3
10 1000
1120A G01
100
1
0.2
0.1
0
–0.1
–0.2
T
J
= –55°C
T
J
= 25°C
T
J
= 125°C
PRE-LOAD = 100µA
PARAMETER CONDITIONS MIN TYP MAX UNITS
Reference
Reference Voltage 4.5V ≤ V
IN
≤ 36V ● 2.40 2.50 2.55 V
Line Regulation 4.5V ≤ V
IN
≤ 36V ● 0.01 0.02 %/V
Load Regulation –2.0mA ≤ I
REF
≤ 2mA, V
IN
= 12V ● 0.4 0.8 %
Output Source Current V
IN
= 5V ● 2mA
Output Sink Current V
IN
= 5V ● 2mA
Regulator
Supply Current V
IN
= 6V, I
OUT
≤ 100µA ● 30 40 µA
V
IN
= 36V, I
OUT
≤ 100µA ● 40 50 µA
V
IN
= 12V, I
OUT
= 125mA ● 11 20 mA
Output Current (V
IN
– V
OUT
) ≥ 1V, V
IN
≥ 6V ● 125 mA
Load Regulation (V
IN
– V
OUT
) ≥ 1V, V
IN
≥ 6V ● 1%
Line Regulation 6V ≤ V
IN
≤ 36V ● 0.02 %/V
Dropout Voltage I
OUT
= 100µA ● 0.06 V
I
OUT
= 125mA ● 0.85 V
Feedback Sense Voltage V
IN
= 12V ● 2.38 2.5 2.57 V
Feedback Bias Current ● 50 nA
Minimum Load Current V
IN
= 36V ● 50 µA
Short-Circuit Current V
IN
= 36V ● 240 400 mA
Comparator
Offset Voltage V
IN
= 36V ● 10 mV
Bias Current V
IN
= 36V ● 15 60 nA
Gain ∆V
OUT
= 29V, R
L
= 20k ● 1000 V/V
Output Sink Current (Note 2) V
IN
= 4.5V ● 510 mA
Leakage Current V
IN
= 36V, V(Pin 7) = 36V ● 8 µA
ELECTRICAL CHARACTERISTICS
Note 2: For T
A
≤ –40°C output sink current drops to 2.5mA.
The ● denotes the specifications which apply over the full operating temperature range of T
J
= 25°C.
TYPICAL PERFOR A CE CHARACTERISTICS
UW