Datasheet

4
LT1120
1120fc
PARAMETER CONDITIONS MIN TYP MAX UNITS
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
a device may be impaired.
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
∆V
OUT
= 100mV
Comparator
Offset Voltage ● 10 mV
Bias Current V
IN
= 36V (Note 2) ● 15 60 nA
Gain ∆V
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.