Datasheet

3
LT1120
1120fc
PARAMETER CONDITIONS MIN TYP MAX UNITS
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 –2mA ≤ 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 ● 65 95 µA
V
IN
= 36V, I
OUT
≤ 100µA ● 85 100 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 ● 300 400 mA
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at T
A
= 25°C. T
j
= 25°C.
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
Feedback Sense Voltage V
IN
= 12V 2.44 2.5 2.56 V
Shutdown Pin Voltage Normal 0.4 V
V
OUT
≤ 0.5V Shutdown 2.2 1.4 V
Shutdown Pin Current V
IN
= 1.4V 25 µA
Feedback Bias Current 15 40 nA
Minimum Load Current V
IN
= 36V 15 µA
Short-Circuit Current V
IN
= 36V 300 400 mA
Comparator
Offset Voltage V
IN
= 36V 37mV
Bias Current V
IN
= 36V (Note 2) 15 40 nA
Gain ∆V
OUT
= 29V, R
L
= 20k 2000 10000 V/V
Power Supply Rejection 4.5V ≤ V
S
≤ 36V 80 96 dB
Output Sink Current V
IN
= 4.5V 10 18 mA
Saturation Voltage I
OUT
= 1mA 0.4 0.6 V
Input Voltage Range 0V
IN
– 1 V
Response Time 5 µs
Leakage Current 2 µA