Datasheet

4
LT1120
1120fd
PARAMETER CONDITIONS MIN TYP MAX UNITS
ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
TYPICAL PERFOR A CE CHARACTERISTICS
UW
REGULATOR OUTPUT CURRENT (mA)
0.1 1
0.01
SUPPLY CURRENT (mA)
1
100
10 100 1000
1120 G02
0.1
10
T
J
= –55°C TO 125°C
TEMPERATURE (°C)
50 10 30 70 110 150
SHORT-CIRCUIT CURRENT (mA)
1120 G03
350
300
250
200
150
100
50
0
CURRENT LIMIT TIED TO GROUND
OUTPUT CURRENT (mA)
OUTPUT VOLTAGE CHANGE (%)
0.3
0.2
0.1
0
0.1
0.2
0.3
0.1 10 100 1000
1120 G01
1
PRELOAD = 100μA
T
J
= 125°C
T
J
= 25°C
T
J
= –55°C
Regulator Load Regulation Supply Current Regulator Short-Circuit Current
Dropout Voltage
TEMPERATURE (°C)
70 80 90 100 110 120 130 140 150
MINIMUM LOAD CURRENT (μA)
100
10
1
1120 G05
RIPPLE FREQUENCY (Hz)
RIPPLE REJECTION (dB)
70
65
60
55
50
45
40
35
30
10 1k 10k 100k
1120 G06
100
I
OUT
= 100mA
I
OUT
= 1mA
V
IN
= 10VDC, 1V
P–P
V
OUT
= 5V
C
OUT
= 10μF
I
OUT
= 10mA
Regulator Minimum Load Current Regulator Ripple Rejection
REGULATOR OUTPUT CURRENT (mA)
0.1 1
0.01
REGULATOR INPUT-OUTPUT DIFFERENTIAL (V)
0.1
1
10 100 1000
1120 G04
ΔV
OUT
= 100mV
Comparator
Offset Voltage 10 mV
Bias Current V
IN
= 36V (Note 2) 15 60 nA
Gain ΔV
OUT
= 29V, R
L
= 20k 1000 V/V
Output Sink Current V
IN
= 4.5V (Note 3) 510 mA
Leakage Current V
IN
= 36V 8 μA
The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
Note 2: T
A
> 85°C, I bias maximum is 100nA.
Note 3: For T
A
–40°C output current sink drops to 2.5mA.