Datasheet

4
LT1317/LT1317B
TYPICAL PERFOR A CE CHARACTERISTICS
UW
INPUT VOLTAGE
0
OSCILLATOR FREQUENCY (kHz)
700
650
600
550
500
2468
1317 TPC01
10 12
25°C
–40°C
85°C
Oscillator Frequency
DUTY CYCLE (%)
0 20406080100
SWITCH CURRENT (mA)
1317 TPC02
800
600
400
200
0
V
IN
= 2V
L = 10µH
Burst Mode Current Limit (LT1317)
Switch Current Limit,
Duty Cycle = 30%
SWITCH CURRENT (A)
0 0.2 0.4 0.6 0.8 1
SWITCH VOLTAGE (V
CESAT
) (mV)
1317 TPC06
700
600
500
400
300
200
100
0
25°C
–40°C
85°C
Switch Voltage Drop (V
CESAT
)
TEMPERATURE (°C)
–50 0 50–25 25 75 100
LBI INPUT BIAS CURRENT (nA)
1317 TPC05
6
5
4
3
2
1
0
LBI Input Bias CurrentSwitch Current Limit
TEMPERATURE (°C)
–50 –25
QUIESCENT CURRENT (µA)
1317 TPC09
110
100
90
80
70
60
50
40
30
0 255075100
Quiescent Current, SHDN = 2V
TEMPERATURE (°C)
–50
FEEDBACK VOLTAGE (V)
1.25
1.24
1.23
1.22
1.21
1.20
–25 0 25 50
1317 TPC07
75 100
Feedback Voltage
TEMPERATURE (°C)
–50
LBI REFERENCE VOLTAGE (mV)
1317 TPC08
203
202
201
200
199
198
197
196
195
–25 0 25 50 75 100
LBI Reference Voltage
TEMPERATURE (°C)
–50
SWITCH CURRENT (mA)
1000
900
800
700
600
500
–25 0 25 50
1317 TPC03
75 100
DUTY CYCLE (%)
0
SWITCH CURRENT (mA)
1200
1000
800
600
400
200
20 40 60 80
1317 TPC04
100
MINIMUM (25°C)
TYPICAL