LT1610 Linear Technology, LT1610 Datasheet - Page 4

• Manufacturer Part Number: LT1610
• Description: Constant-Current/ Constant-Voltage 1.4MHz Step-Up DC/DC Converter
• Manufacturer: Linear Technology

LT1610
TYPICAL PERFOR A CE CHARACTERISTICS
4
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
600
500
400
300
200
100
50
40
20
30
10
0
0
0
0
0
V
Oscillator Frequency
vs Input Voltage
SHDN Pin Current
vs SHDN Pin Voltage
T
CESAT
A
= 25 C
1
1
100
vs Current
2
SWITCH CURRENT (mA)
2
T
INPUT VOLTAGE (V)
200
SHDN VOLTAGE (V)
A
= 25 C
3
3
300
4
4
T
A
T
= 85 C
A
5
5
400
= – 40 C
W
6
6
500
7
1610 G07
7
1610 G01
1610 G04
U
600
8
8
AC COUPLED
I
100mA/DIV
LOAD
50mV/DIV
1.240
1.235
1.230
1.225
1.220
1.215
1.210
31mA
V
1mA
800
700
600
500
400
300
200
OUT
I
L1
–50
–50
Current Limit (DC = 30%)
vs Temperature
Transient Response,
Circuit of Figure 1
Feedback Voltage
V
V
IN
OUT
= 1.25V
= 3V
–25
–25
TEMPERATURE ( C)
TEMPERATURE ( C)
0
0
500 s/DIV
25
25
50
50
75
75
1610 G02
1610 G05
1610 TA08
100
100
AC COUPLED
20mV/DIV
50mA/DIV
CURRENT
VOLTAGE
SWITCH
SWITCH
2V/DIV
V
800
700
600
500
400
300
200
100
OUT
40
35
30
25
20
15
10
0
0
5
– 50
Current Limit vs Duty Cycle
0
Quiescent Current
vs Temperature
Burst Mode Operation,
Circuit of Figure 1
V
V
I
LOAD
IN
OUT
= 1.25V
10
= 3V
= 3mA
– 25
20
30
TEMPERATURE ( C)
0
DUTY CYCLE (%)
40
20 s/DIV
25
50
60
50
70
T
80
A
75
= 25 C
1610 TA08
90
1610 G06
1610 G03
100
100