Datasheet

4
LT1610
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Current Limit vs Duty CycleV
CESAT
vs Current
SWITCH CURRENT (mA)
0
100
V
CESAT
(mV)
200
300
400
500
600
100
200 300 400
1610 G01
500 600
T
A
= 85°C
T
A
= –40°C
T
A
= 25°C
Current Limit (DC = 30%)
vs Temperature
TEMPERATURE (°C)
–50
200
SWITCH CURRENT LIMIT (mA)
300
400
500
600
800
–25
02550
1610 G02
75 100
700
Oscillator Frequency
vs Input Voltage Feedback Voltage
SHDN Pin Current
vs SHDN Pin Voltage
Transient Response,
Circuit of Figure 1
SHDN VOLTAGE (V)
0
SHDN CURRENT (µA)
30
40
50
35 8
1610 G07
20
10
0
12
4
67
V
OUT
50mV/DIV
AC COUPLED
I
L1
100mA/DIV
31mA
1mA
I
LOAD
V
IN
= 1.25V 500µs/DIV
V
OUT
= 3V
1610 TA08
DUTY CYCLE (%)
0
CURRENT LIMIT (mA)
800
700
600
500
400
300
200
100
0
80
1610 G03
20 40 60 1007010 30 50 90
T
A
= 25°C
INPUT VOLTAGE (V)
0
0
SWITCHING FREQUENCY (MHz)
0.25
0.75
1.00
1.25
2.50
1.75
2
4
5
1610 G04
0.50
2.00
2.25
1.50
13
6
7
8
T
A
= 25°C
TEMPERATURE (°C)
–50
1.210
FEEDBACK VOLTAGE (V)
1.215
1.220
1.225
1.230
1.240
–25
02550
1610 G05
75 100
1.235
Quiescent Current
vs Temperature
TEMPERATURE (°C)
–50
QUIESCENT CURRENT (µA)
15
20
25
25
75
1610 G06
10
5
0
–25 0 50
30
35
40
100
Burst Mode Operation,
Circuit of Figure 1
V
OUT
20mV/DIV
AC COUPLED
SWITCH
VOLTAGE
2V/DIV
V
IN
= 1.25V 20µs/DIV
V
OUT
= 3V
I
LOAD
= 3mA
1610 TA08
SWITCH
CURRENT
50mA/DIV