LTC3115-1
9
Rev. C
TYPICAL PERFORMANCE CHARACTERISTICS
Inductor Current Limit Thresholds
vs Temperature
(T
A
= 25°C unless otherwise specified)
SW1, SW2 Minimum Low Time
vs V
CC
SW1, SW2 Minimum Low Time
vs Switching Frequency
SW2 Maximum Duty Cycle
vs Switching Frequency
Die Temperature Rise vs Load
Current, V
OUT
= 5V, f
SW
= 750kHz
Die Temperature Rise vs Load
Current, V
OUT
= 5V, f
SW
= 1.5MHz
SW1, SW2 Minimum Low Time
vs Temperature
TEMPERATURE (°C)
–50
–5
CHANGE FROM 25°C (%)
–4
–2
–1
0
5
2
0
50
31151 G34
–3
3
4
1
100
150
SWA
CURRENT
LIMIT
SWB
CURRENT
LIMIT
TEMPERATURE (°C)
–50
90
MINIMUM LOW TIME (ns)
92
96
98
100
110
104
0
50
31151 G35
94
106
108
102
100
150
f
SW
= 1MHz
NO LOAD
V
CC
(V)
2.5
60
MINIMUM LOW TIME (ns)
80
100
120
140
180
3
3.5
4
4.5
31151 G36
5
5.5
160
f
SW
= 300kHz
f
SW
= 1MHz
f
SW
= 2MHz
SWITCHING FREQUENCY (kHz)
0
140
160
200
1500
31151 G37
120
100
500
1000
2000
80
60
180
MINIMUM LOW TIME (ns)
V
CC
= 2.7V
V
CC
= 4.4V
SWITCHING FREQUENCY (kHz)
0
MAXIMUM DUT
Y CYCLE (%)
92
93
2000
31151 G38
91
90
500
1000
1500
95
94
Power Switch Resistance
vs V
CC
FB Voltage vs Temperature
V
CC
(V)
2.5
140
POWER SWITCH (A-D) RESISTANCE (mΩ)
145
150
155
160
170
3
3.5
4
4.5
31151 G32
5
5.5
165
TEMPERATURE (°C)
–50
–1.0
CHANGE FROM 25°C (%)
–0.8
–0.4
–0.2
0
1.0
0.4
0
50
31151 G33
–0.6
0.6
0.8
0.2
100
150
LOAD CURRENT (A)
0
0
DIE TEMPERATURE CHANGE FROM AMBIENT (°C)
10
20
30
40
50
60
0.5
1
1.5
2
31151 G49
V
IN
= 36V
V
IN
= 24V
V
IN
= 12V
V
IN
= 6V
V
IN
= 3.6V
STANDARD DEMO PCB
L = 15µH MSS1048
LOAD CURRENT (A)
0
0
DIE TEMPERATURE CHANGE FROM AMBIENT (°C)
10
20
30
50
70
100
90
40
60
80
0.5
1
1.5
2
31151 G50
V
IN
= 36V
V
IN
= 24V
V
IN
= 12V
V
IN
= 6V
V
IN
= 3.6V
STANDARD DEMO PCB
L = 15µH MSS1048
