LT1308B Linear Technology, LT1308B Datasheet - Page 2

• Manufacturer Part Number: LT1308B
• Description: High Current/ Micropower Single Cell/ 600kHz DC/DC Converters
• Manufacturer: Linear Technology

A
V
SW Voltage ............................................................. 30V
FB Voltage ....................................................... V
V
LBI Voltage ............................................ 0V V
Current into FB Pin .............................................. 1mA
Junction Temperature ...........................................125 C
Operating Temperature Range
LT1308
Storage Temperature Range ................ – 65 C to 150 C
Lead Temperature (Soldering, 10 sec)................. 300 C
SYMBOL
I
V
I
g
A
f
ELECTRICAL C
Commercial Grade 0 C to 70 C. V
2
Q
B
OSC
m
FB
V
IN
C
BSOLUTE
Commercial (Note 1) ......................... – 20 C to 70 C
Industrial ........................................... – 40 C to 85 C
, SHDN, LBO Voltage ......................................... 10V
Voltage ................................................................ 2V
PARAMETER
Quiescent Current
Feedback Voltage
FB Pin Bias Current (Note 2)
Reference Line Regulation
Minimum Input Voltage
Input Voltage Range
Error Amp Transconductance
Error Amp Voltage Gain
Switching Frequency
Maximum Duty Cycle
Switch Current Limit (Note 3)
Switch V
Burst Mode Operation Switch Current Limit
Shutdown Pin Current
LBI Threshold Voltage
LBO Output Low
LBO Leakage Current
LBI Input Bias Current (Note 4)
CESAT
W
A
HARA TERISTICS
XI
W
IN
U
= 1.1V, V
C
W
R
SHDN
A
TI
= V
U
IN
G
, T
LBI
IN
S
CONDITIONS
Not Switching
V
V
1.1V V
1.1V V
2V V
25 C, 0 C
70 C
DC = 40%
DC = 80%
I
I
L = 3.3 H, V
V
V
V
I
V
V
A
SW
SW
SINK
SHDN
FB
I = 5 A
SHDN
SHDN
SHDN
LBI
LBI
+ 1V
= 25 C, unless otherwise noted.
= V
= 2A (25 C, 0 C)
= 2A (70 C)
1V
= 250mV, V
= 150mV
= 10 A
IN
= 0V
= 1.1V
= 6V
= 0V
REF
IN
IN
6V
OUT
2V (25 C, 0 C)
2V (70 C)
Consult factory for Military grade parts.
PACKAGE/ORDER I FOR ATIO
= 3.3V, V
LBO
SHDN
GND
= 5V
V
FB
C
T
JMAX
1
2
3
4
IN
8-LEAD PLASTIC SO
= 125 C,
= 1.2V
S8 PACKAGE
TOP VIEW
JA
= 80 C/W
8
7
6
5
LBO
LBI
V
SW
MIN
1.20
500
180
IN
2.0
1.6
80
1
U
S8 PART MARKING
– 1.5
1.22
0.92
0.01
TYP
100
600
300
330
200
200
0.6
0.3
2.5
0.1
80
27
40
80
88
13
2.5
1
2
5
ORDER PART
LT1308CS8
LT1308IS8
NUMBER
W
1308
1308I
MAX
– 2.5
0.25
1.24
160
700
350
400
220
1.1
1.5
0.8
0.1
80
95
26
30
4.0
3
1
6
UNITS
mhos
U
%/V
%/V
%/V
kHz
V/V
V/V
mV
mV
mA
mV
nA
nA
%
A
A
V
V
V
A
A
A
A
A
V
A