LT1305 LINER [Linear Technology], LT1305 Datasheet - Page 2

• Manufacturer Part Number: LT1305
• Description: Micropower High Power DC/DC Converter with Low-Battery Detector
• Manufacturer: LINER [Linear Technology]

A
LT1305
V
SW1 Voltage ............................................................ 25V
FB Voltage ............................................................... 10V
Shutdown Voltage ................................................... 10V
LBO Voltage ............................................................. 10V
LBI Voltage .............................................................. 10V
Maximum Power Dissipation ............................. 500mW
Operating Temperature Range ..................... 0 C to 70 C
Storage Temperature Range ................. – 65 C to 150 C
Lead Temperature (Soldering, 10 sec).................. 300 C
SYMBOL
I
V
DC
t
V
V
V
I
The
temperature range.
Note 1: Hysteresis specified is DC. Output ripple may be higher if output
capacitance is insufficient or capacitor ESR is excessive.
2
ELECTRICAL C
Q
ON
SHDN
IN
CESAT
SHDNH
SHDNL
IN
BSOLUTE
Voltage .............................................................. 10V
denotes specifications which apply over the 0 C to 70 C operating
PARAMETER
Quiescent Current
Input Voltage Range
Feedback Voltage
Comparator Hysteresis
Feedback Pin Bias Current
Oscillator Frequency
Oscillator TC
Maximum Duty Cycle
Switch On Time
Output Line Regulation
Switch Saturation Voltage
Switch Leakage Current
Peak Switch Current
LBI Trip Voltage
LBI Input Bias Current
LBO Output Low
LBO Leakage Current
Shutdown Pin High
Shutdown Pin Low
Shutdown Pin Bias Current
W
A
HARA TERISTICS
XI
W
U
C
W
R
CONDITIONS
V
V
V
Current Limit Not Asserted
Current Limit Not Asserted
1.8V < V
I
V
V
(Note 2)
V
I
V
V
V
V
SW
V
LOAD
SHDN
SHDN
FB
SW
IN
LBI
LBI
SHDN
SHDN
SHDN
IN
A
= 2V
= 1V
= 1A
= 5V
= 5V, Switch Off
= 1V
= 1.3V, V
= 100 A
TI
= 0.5V, V
= 1.8V
= 5V
= 2V
= 0V
IN
U
< 6V
G
LBO
FB
S
T
= 5V
A
= 2V
= 25 C, V
PACKAGE/ORDER I FOR ATIO
Consult factory for Industrial and Military grade parts.
Note 2: Low-battery detector comparator is inoperative when device is in
shutdown.
IN
= 2.0V, unless otherwise noted.
SHDN
GND
LBO
FB
T
JMAX
1
2
3
4
8-LEAD PLASTIC SO
= 100 C,
S8 PACKAGE
TOP VIEW
JA
= 80 C/ W
8
7
6
5
PGND
SW
V
LBI
IN
1.22
1.35
1.20
1.15
1.21
MIN
120
1.8
2.0
1.8
75
U
1.55
1.24
0.06
1.24
0.11
TYP
S8 PART MARKING
120
155
140
0.2
5.6
0.1
0.1
8.0
3.0
0.1
86
7
6
7
7
2
ORDER PART
LT1305CS8
NUMBER
W
1305
MAX
1.26
12.5
0.15
2.35
2.50
2.15
1.27
200
185
280
0.4
0.5
15
20
95
10
20
20
5
1
UNITS
U
%/ C
%/V
kHz
mV
mV
nA
nA
%
A
A
V
V
V
A
A
A
A
V
V
A
V
V
A
A
A
s