LT1111 LINER [Linear Technology], LT1111 Datasheet - Page 3

• Manufacturer Part Number: LT1111
• Description: Micropower DC/DC Converter Adjustable and Fixed 5V, 12V
• Manufacturer: LINER [Linear Technology]

SYMBOL
A
I
ELECTRICAL C
V
SYMBOL
I
f
DC
t
V
V
SYMBOL
I
f
DC
t
V
The
temperature range.
Note 1: This specification guarantees that both the high and low trip points
of the comparator fall within the 1.20V to 1.30V range.
LIM
Q
OSC
ON
Q
OSC
ON
V
SAT
SAT
IN
IN
= 3V, – 55 C T
= 3V, 0 C T
denotes specifications which apply over the full operating
PARAMETER
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
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
A
70 C unless otherwise noted.
Step-Down Mode
Step-Down Mode
125 C unless otherwise noted.
HARA TERISTICS
Step-Down Mode
Step-Down Mode
C
CONDITIONS
CONDITIONS
Switch OFF
Full Load
I
V
2V V
2.4V V
0 C T
T
V
I
CONDITIONS
Switch OFF
Full Load
I
V
2V V
V
V
5V V
2V V
R
220 from I
Measured at SW1 Pin, V
I
LIM
SW
LIM
V
SW1
OUT
A
IN
OUT
IN
IN
L
IN
= – 55 C, I
= 100k (Note 3)
= 12V,
= 3V, I
= 12V, I
= 500mA
Tied to V
Tied to V
= 5V, V
= 5V, V
= 3V, Military or Commercial Version
IN
IN
10 A, Switch OFF
IN
IN
A
IN
SW
5V, 25 C T
5V
125 C, I
30V
5V
SW
IN
IN
LIM
5V, T
IN
IN
SW
= 650mA
Note 2: 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 3: 100k resistor connected between a 5V source and the A0 pin.
= 650mA
= 12V
= 12V
to V
= 400mA
0 C T
T
A
A
SW
= – 55 C
= – 55 C
IN
= 500mA,
A
A
SW1
125 C
125 C
= 12V
1000
MIN
MIN
MIN
300
5.0
3.3
45
40
20
54
43
24
5
3
LT1111C
LT1111M
– 400
6000
– 0.3
0.02
0.20
TYP
400
TYP
TYP
300
0.2
0.5
0.2
0.5
1.1
72
50
72
50
34
1
7
7
5
0.075
0.400
– 350
MAX
MAX
MAX
0.65
0.65
1.50
500
100
450
10
0.4
0.8
1.5
2.0
9.0
7.8
0.7
62
55
11
95
59
50
9
LT1111
UNITS
UNITS
UNITS
%/
3
%/V
%/V
%/V
%/V
%/V
V/V
mA
mV
kHz
kH
%
%
%
%
C
A
A
V
V
V
A
V
V
s
s
s
s