LT1111CS85PBF LINEAR TECH, LT1111CS85PBF Datasheet - Page 3

• Manufacturer Part Number: LT1111CS85PBF
• Manufacturer: LINEAR TECH

SYMBOL
I
I
V
A
I
ELECTRICAL C
temperature range, otherwise specifications are at T
The
V
SYMBOL
I
f
DC
t
V
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: This specification guarantees that both the high and low trip points
of the comparator fall within the 1.20V to 1.30V range.
FB
SET
LIM
Q
OSC
ON
OL
V
SAT
IN
= 3V, 0 C T
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
PARAMETER
Feedback Pin Bias Current
Set Pin Bias Current
Gain Block Output Low
Reference Line Regulation
Gain Block Gain
Current Limit
Current Limit Temperature Coefficient
Switch OFF Leakage Current
Maximum Excursion Below GND
PARAMETER
Quiescent Current
Oscillator Frequency
Duty Cycle: Step-Up Mode
Switch ON Time: Step-Up Mode
Reference Line Regulation
SW Saturation Voltage, Step-Up Mode
SW Saturation Voltage, Step-Down Mode
A
70 C unless otherwise noted.
Step-Down Mode
HARA TERISTICS
Step-Down Mode
C
A
= 25 C.V
CONDITIONS
LT1111, V
I
5V V
2V V
R
220 from I
Measured at SW1 Pin, V
I
CONDITIONS
Switch OFF
Full Load
I
V
2V V
V
V
V
SINK
SW1
LIM
L
OUT
IN
IN
The
SET
= 100k (Note 4)
= 3V, I
= 12V, I
Tied to V
= 300 A, V
= V
= 5V, V
10 A, Switch OFF
IN
IN
IN
IN
REF
denotes the specifications which apply over the full operating
= 3V, Military or Commercial Version
FB
SW
5V
30V
5V
SW
LIM
= 0V
IN
IN
= 650mA
Note 3: The output voltage waveform will exhibit a sawtooth shape due to
the comparator hysteresis. The output voltage on the fixed output versions
will always be within the specified range.
Note 4: 100k resistor connected between a 5V source and the A0 pin.
= 12V
= 650mA
to V
SET
IN
= 1.00V
SW1
= 12V
1000
MIN
MIN
300
5.0
3.3
54
43
24
LT1111C
– 400
6000
– 0.3
0.15
0.02
0.20
TYP
400
TYP
70
70
0.2
0.5
1.1
72
50
34
1
7
5
0.075
0.400
– 350
MAX
MAX
120
300
0.65
1.50
0.4
450
10
9.0
7.8
0.7
95
59
50
A
= 25 C.
LT11 11
UNITS
UNITS
1111fd
3
%/
%/V
%/V
%/V
V/V
mA
mV
nA
nA
kH
%
%
V
C
A
A
V
V
s
s