LT1105 LINER [Linear Technology], LT1105 Datasheet - Page 3

• Manufacturer Part Number: LT1105
• Description: Offline Switching Regulator
• Manufacturer: LINER [Linear Technology]

Consult factory for Military grade parts.
PACKAGE/ORDER
ELECTRICAL CHARACTERISTICS
V
SYMBOL
I
I
V
V
SF
Q
START
REF
GATE
IN
= 20V, V
PWRGND
PINS 1 AND 7 MUST BE TIED TOGETHER
OVLO
GND
5V
SS
FB
V
C
T
PARAMETER
Supply Current
Start-Up Current
V
V
5V Reference Voltage
V
V
V
15V Short-Circuit Current
15V Gate Bias Reference
15V Dropout Voltage
15V Short-Circuit Current
Oscillator Scaling Factor
Oscillator Valley Voltage
Oscillator Peak Voltage
JMAX
C
IN
IN
REF
REF
REF
1
2
3
4
5
6
7
= 0.85V, OVLO = 0V, V
Start Threshold
Shutdown Threshold
= 100 C,
Line Regulation
Load Regulation
Short-Circuit Current
14-LEAD PDIP
N PACKAGE
TOP VIEW
JA
= 100 C/W
14
13
12
11
10
9
8
V
NC
NC
15V
V
OSC
I
LIM
SW
IN
INFORMATION
U
SW
Open, T
CONDITIONS
8V < V
V
Industrial Grade
Note: Switching Stops When V
Note: Switching Stops When V
10V < V
0mA < I
Commercial Grade
Industrial Grade
Commercial Grade
Industrial Grade
17 < V
V
FB = 4V, V
OVLO = 5V, f
IN
IN
W
< V
= 15V, I
ORDER PART
A
LT1105CN
LT1105IN
IN
IN
NUMBER
IN
25 C, unless otherwise noted.
IN
L
< 30V, 0mA < I
< 30V, After Device Has Started
< 20mA
Start Threshold
< 30V
C
L
= Open, Measured at V
OSC
= 30mA
= SF/C
U
OSC,
L
< 30mA
40kHz < f
CASE IS CONNECTED TO GROUND. LEADS ARE FORMED
SW
GATE
< 10V (LT1103)
SW
< 10V (LT1105)
GND
I
LIM
OSC
, I
FB
V
C
T
SW
T
JMAX
JMAX
< 200kHz
1
2
3
4
7-LEAD TO-220
= 25mA,
FRONT VIEW
T7 PACKAGE
= 100 C,
= 100 C,
N8 PACKAGE
8-LEAD PDIP
TOP VIEW
7
6
5
4
3
2
1
JA
JA
= 130 C/W
= 50 C/W
6
8
7
5
V
15V
V
OSC
SW
IN
MIN
14.5
4.80
13.8
5.0
10
25
20
30
25
30
36
32
LT1103/LT1105
15V
V
OSC
GND
V
FB
V
IN
C
SW
0.025
0.025
16.0
4.95
15.0
TYP
200
7.0
2.0
2.0
4.5
20
60
70
40
40
ORDER PART
ORDER PART
LT1103CT7
LT1105CN8
LT1105IN8
NUMBER
NUMBER
MAX
17.5
5.20
0.05
16.2
400
450
110
120
130
140
130
8.0
0.1
2.5
30
44
48
Hz • F
Hz • F
UNITS
%/mA
3
%/ V
mA
mA
mA
mA
mA
mA
A
A
V
V
V
V
V
V
V