LT1304/LT1304-3.3/LT1304-5
W W U W
U
W U
ABSOLUTE MAXIMUM RATINGS
PACKAGE/ORDER INFORMATION
VIN Voltage ................................................................ 8V
SW Voltage ............................................... –0.4V to 25V
FB Voltage (LT1304)...................................... VIN + 0.3V
Sense Voltage (LT1304-3.3/LT1304-5) ..................... 8V
ORDER PART
NUMBER
TOP VIEW
LT1304CS8
LT1304CS8-3.3
LT1304CS8-5
LBI
1
2
3
4
FB (SENSE)*
SHDN
8
7
6
5
ILIM Voltage .............................................................. 5V
LBO
SHDN Voltage ............................................................ 6V
LBI Voltage ............................................................... VIN
LBO Voltage............................................................... 8V
Maximum Power Dissipation ............................. 500mW
Junction Temperature.......................................... 125°C
Operating Temperature Range ..................... 0°C to 70°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
V
IN
I
LIM
SW
GND
S8 PART MARKING
S8 PACKAGE
8-LEAD PLASTIC SO
*FIXED OUTPUT VERSION
1304
13043
13045
TJMAX = 125°C, θJA = 150°C/W
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS
VIN = 2V, VSHDN = 2V unless otherwise noted.
MIN
PARAMETER
CONDITIONS
TYP
MAX
1.65
8
UNITS
Minimum Operating Voltage
Operating Voltage Range
Quiescent Current
●
●
●
1.5
V
V
V
SHDN
= 2V, Not Switching
120
200
µA
Quiescent Current in Shutdown
V
SHDN
V
SHDN
= 0V, V = 2V
●
●
7
27
15
50
µA
µA
IN
= 0V, V = 5V
IN
Comparator Trip Point
FB Pin Bias Current
LT1304
LT1304
●
●
●
1.22
1.24
10
1.26
25
1
V
nA
µA
Sense Pin Leakage in Shutdown
Output Sense Voltage
V
SHDN
= 0V, Fixed Output Versions
0.002
LT1304-3.3
LT1304-5
●
●
3.17
4.80
3.3
5.05
3.43
5.25
V
V
Line Regulation
1.8V ≤ V ≤ 8V
●
●
●
●
●
●
0.04
1.17
6
0.15
1.25
20
%/V
V
IN
LBI Input Threshold
LBI Bias Current
Falling Edge
1.10
nA
mV
V
LBI Input Hysteresis
LBO Output Voltage Low
LBO Output Leakage Current
35
65
I
= 500µA
0.2
0.01
0.4
0.1
SINK
LBI = 1.5V, LBO = 5V
µA
SHDN Input Voltage High
SHDN Input Voltage Low
●
●
1.4
V
V
0.4
8
SHDN Pin Bias Current
V
V
= 5V
= 0V
●
●
5
µA
µA
SHDN
SHDN
–5
1
–2
Switch OFF Time
●
●
●
1.5
6
2
8
µs
µs
%
Switch ON Time
Current Limit Not Asserted
Current Limit Not Asserted
4
Maximum Duty Cycle
Peak Switch Current
76
0.8
80
88
1.2
I
Pin Open, V = 5V
1
500
A
mA
LIM
IN
20k from I to GND
LIM
2
Linear [ Linear ]
