Datasheet

4
LT1303/LT1303-5
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
Oscillator Frequency
Switch On-Time Maximum Duty Cycle
TEMPERATURE (°C)
–50
2
ON-TIME (µs)
3
4
5
6
8
–25
02550
LT1303 G10
75 100
7
TEMPERATURE (°C)
–50
100
FREQUENCY (kHz)
120
130
140
150
160
170
–25
0
25 50
LT1303 G11
75
180
190
200
110
100
TEMPERATURE (°C)
–50
50
DUTY CYCLE (%)
60
65
70
75
80
85
–25
0
25 50
LT1303 G12
75
90
95
100
55
100
Quiescent Current Quiescent Current Switch Current Limit
TEMPERATURE (°C)
–50
100
QUIESCENT CURRENT (µA)
120
130
140
150
160
170
–25
0
25 50
LT1303 G13
75
180
190
200
110
100
SWITCH OFF
V
IN
= 2V
INPUT VOLTAGE (V)
0
SWITCH CURRENT (mA)
1000
1100
1200
8
LT1303 G15
900
800
700
2
4
6
10
L = 33µH
V
L
= 3V
INPUT VOLTAGE (V)
0
QUIESCENT CURRENT (µA)
300
400
500
8
LT1303 G14
200
100
0
2
4
6
10
T
A
= 25°C
SWITCH OFF
200µs/DIV
Transient Response
Figure 1 Circuit
V
IN
= 2V
V
OUT
= 5V
LT1303 G16
200mA
0mA
V
OUT
100mV/DIV
AC COUPLED
I
LOAD
R
PULL-UP
= 47k
Low Battery Detector Transient
Response
LT1303 G18
5µs/DIV
V
LBO
2V/DIV
V
TRIP
+10mV
V
TRIP
–10mV
LT1303 G17
500µs/DIV
5V
Shutdown Pin Response
R
LOAD
= 100Ω
V
IN
= 2V
V
OUT
= 5V
C
OUT
= 100µF
V
OUT
1V/DIV
V
SHDN
5V/DIV
V
LBI