LT1611 Linear Technology, LT1611 Datasheet - Page 3

• Manufacturer Part Number: LT1611
• Description: Constant-Current/ Constant-Voltage 1.4MHz Step-Up DC/DC Converter
• Manufacturer: Linear Technology

* Includes bias current through R1, R2 and Schottky leakage current at T 75 C
TYPICAL PERFOR A CE CHARACTERISTICS
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
700
600
500
400
300
200
100
85
80
75
70
65
60
55
50
0
0
–50
0
0
Efficiency, V
Switch V
Oscillator Frequency vs
Temperature
T
A
100
= 25 C
–25
25
V
IN
= 5V
SWITCH CURRENT (mA)
200
CESAT
LOAD CURRENT (mA)
V
TEMPERATURE ( C)
50
IN
0
OUT
= 1.5V
300
V
vs Switch Current
IN
75
= – 5V
25
= 3V
400
V
IN
100
50
= 5V
500
W
125
75
600
1611 G01
1611 G04
1611 G07
U
150
700
100
–1.245
–1.240
–1.235
–1.230
–1.225
–1.220
–1.215
–1.210
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
50
40
30
20
10
0
–50
–50
0
V
SHDN Pin Bias Current vs V
No-Load Operating Quiescent
Current vs Temperature*
NFB
–25
–25
vs Temperature
1
SHDN PIN VOLTAGE (V)
TEMPERATURE ( C)
TEMPERATURE ( C)
0
0
2
25
25
3
50
50
4
75
75
SHDN
1611 G05
1611 G02
1611 G08
100
100
5
900
800
700
600
500
400
300
200
100
900
800
700
600
500
400
300
200
100
0
0
6
5
4
3
2
1
0
–50
–50
10
NFB Pin Bias Current vs
Temperature
Switch Current Limit vs Duty Cycle
Switch Current Limit vs
Temperature (Duty Cycle = 30%)
T
A
20
= 25 C
–25
–25
30
TEMPERATURE ( C)
TEMPERATURE ( C)
DUTY CYCLE (%)
0
0
40
25
25
50
LT1611
50
50
60
75
75
70
1611 G06
1611 G09
1611 G03
3
100
100
80