LTC3115-1
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency vs Switching Frequency
95
BOOTSTRAPPED
90
EFFICIENCY (%)
PWM MODE
L = 47µH
V
IN
= 24V
V
OUT
= 5V
I
LOAD
= 0.5A
35
30
V
CC
/PV
CC
CURRENT (mA)
25
20
15
10
5
0
1000
500
1500
SWITCHING FREQUENCY (kHz)
0
0
1500
SWITCHING FREQUENCY (kHz)
500
1000
2000
31151 G15
(T
A
= 25°C unless otherwise specified)
Combined V
CC
/PV
CC
Supply
Current vs V
CC
16
14
V
CC
/PV
CC
CURRENT (mA)
12
10
8
6
4
2
0
2.5
3
3.5
4.5
4
V
CC
(V)
5
5.5
31151 G16
Combined V
CC
/PV
CC
Supply
Current vs Switching Frequency
85
80
NON-BOOTSTRAPPED
75
V
IN
= 36V
V
OUT
= 24V
V
IN
= 12V
V
OUT
= 5V
f
SW
= 1MHz
f
SW
= 500kHz
70
2000
31151 G14
CHANGE IN OUTPUT VOLTAGE FROM V
IN
= 20V (%)
Combined V
CC
/PV
CC
Supply
Current vs Temperature
11.9
V
CC
/PV
CC
CURRENT (mA)
11.8
V
IN
= 6V
V
OUT
= 5V
f
SW
= 1MHz
CHANGE IN VOLTAGE FROM ZERO LOAD (%)
12.0
0.5
0.4
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
Output Voltage Load Regulation
Output Voltage Line Regulation
0.5
0.4
0.3
0.2
0.1
0
11.7
11.5
11.4
11.3
11.2
11.1
11.6
–0.1
–0.2
–0.3
–0.4
0
10
20
30
INPUT VOLTAGE (V)
40
31151 G19
11.0
–50
0
50
100
TEMPERATURE (°C)
150
31151 G17
0
1
0.5
1.5
LOAD CURRENT (A)
2
31151 G18
–0.5
V
CC
Voltage vs Temperature
1.0
CHANGE IN VOLTAGE FROM I
CC
= 0mA (%)
0.8
0.6
CHANGE FROM 25°C (%)
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
–50
0
50
100
TEMPERATURE (°C)
150
31151 G20
0
V
CC
Regulator Load Regulation
1.0
0.8
CHANGE FROM V
IN
= 24V (%)
V
CC
Regulator Line Regulation
–0.5
0.6
0.4
0.2
0
–1.0
–1.5
–2.0
–0.2
–0.4
–0.6
–0.8
–2.5
0
10
30
20
I
CC
(mA)
40
50
31151 G21
–1.0
0
10
20
30
INPUT VOLTAGE (V)
40
31151 G22
31151f
6
LINEAR [ LINEAR INTEGRATED SYSTEMS ]
