LT1303 データシートの表示（PDF） - Linear Technology
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LT1303 Datasheet PDF : 12 Pages
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LT1303/LT1303-5
ABSOLUTE MAXIMUM RATINGS
VIN Voltage .............................................................. 10V
SW1 Voltage ............................................................ 25V
Sense Voltage (LT1303-5) ....................................... 20V
FB Voltage (LT1303) ................................................ 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
PACKAGE/ORDER INFORMATION
TOP VIEW
GND 1
LBO 2
SHDN 3
FB (SENSE)* 4
8 PGND
7 SW
6 VIN
5 LBI
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
*FIXED VERSION
TJMAX = 100°C, θJA = 130°C/W (N8)
TJMAX = 100°C, θJA = 150°C/W (S8)
ORDER PART
NUMBER
LT1303CN8
LT1303CS8
LT1303CN8-5
LT1303CS8-5
S8 PART MARKING
1303
13035
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS TA = 25°C, VIN = 2.0V, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
IQ
Quiescent Current
VIN
Input Voltage Range
VSHDN = 0.5V, VSEL = 5V, VSENSE = 5.5V
VSHDN = 1.8V
q
120 200
µA
q
7
15
µA
1.8
1.55
V
q
2.0
V
Feedback Voltage
LT1303
q 1.22 1.24 1.26
V
Output Sense Voltage
LT1303-5
q
4.8
5.0
5.2
V
Comparator Hysteresis
LT1303 (Note 1)
q
6
12.5
mV
Output Hysteresis
LT1303-5 (Note 1)
q
22
50
mV
Feedback Pin Bias Current
Oscillator Frequency
LT1303, VFB = 1V
Current Limit Not Asserted
q
7
20
nA
120 155 185
kHz
Oscillator TC
0.2
%/°C
DC
Maximum Duty Cycle
q
75
86
95
%
tON
VCESAT
Switch On Time
Output Line Regulation
Switch Saturation Voltage
Switch Leakage Current
Peak Switch Current
LBI Trip Voltage
Current Limit Not Asserted
1.8V < VIN < 6V
ISW = 700mA
VSW = 5V, Switch Off
VIN = 2V
VIN = 5V
5.6
µs
q
0.06 0.15
%/V
q
130 200
mV
q
0.1
10
µA
q
0.75
1.0
1.25
A
0.65
0.9
1.15
A
q 1.21 1.24 1.27
V
VSHDNH
VSHDNL
ISHDN
LBI Input Bias Current
LBO Output Low
LBO Leakage Current
Shutdown Pin High
Shutdown Pin Low
Shutdown Pin Bias Current
VLBI = 1V
ILOAD = 100µA
VLBI = 1.3V, VLBO = 5V
VSHDN = 5V
VSHDN = 2V
VSHDN = 0V
q
7
20
nA
q
0.11
0.4
V
q
0.1
5
µA
q
1.8
V
0.5
V
q
8.0
20
µA
q
3.0
µA
q
0.1
1
µA
The q denotes specifications which apply over the 0°C to 70°C operating
temperature range.
Note 1: Hysteresis specified is DC. Output ripple may be higher if output
capacitance is insufficient or capacitor ESR is excessive.
2
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