LTC3115-1
TYPICAL PERFORMANCE CHARACTERISTICS
Power Switch Resistance
vs V
CC
170
POWER SWITCH (A-D) RESISTANCE (m )
165
CHANGE FROM 25°C (%)
160
155
150
145
140
1.0
0.8
CHANGE FROM 25°C (%)
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
2.5
3
3.5
4
V
CC
(V)
4.5
5
5.5
31151 G32
(T
A
= 25°C unless otherwise specified)
Inductor Current Limit Thresholds
vs Temperature
5
4
3
2
1
0
–1
–2
–3
–4
SWB
CURRENT
LIMIT
0
50
100
TEMPERATURE (°C)
150
31151 G34
FB Voltage vs Temperature
SWA
CURRENT
LIMIT
–1.0
–50
0
50
100
TEMPERATURE (°C)
150
31151 G33
–5
–50
SW1, SW2 Minimum Low Time
vs Temperature
110
108
MINIMUM LOW TIME (ns)
106
104
102
100
98
96
94
92
90
–50
0
50
100
TEMPERATURE (°C)
150
31151 G35
f
SW
= 1MHz
NO LOAD
MINIMUM LOW TIME (ns)
180
160
SW1, SW2 Minimum Low Time
vs V
CC
200
180
MINIMUM LOW TIME (ns)
f
SW
= 300kHz
160
140
120
100
SW1, SW2 Minimum Low Time
vs Switching Frequency
140
120
100
80
60
f
SW
= 1MHz
V
CC
= 2.7V
f
SW
= 2MHz
V
CC
= 4.4V
80
2.5
3
3.5
4
V
CC
(V)
4.5
5
5.5
31151 G36
60
0
500
1000
1500
SWITCHING FREQUENCY (kHz)
2000
31151 G37
SW2 Maximum Duty Cycle
vs Switching Frequency
DIE TEMPERATURE CHANGE FROM AMBIENT (°C)
95
94
60
50
40
30
20
10
0
Die Temperature Rise vs Load
Current, V
OUT
= 5V, f
SW
= 750kHz
DIE TEMPERATURE CHANGE FROM AMBIENT (°C)
V
IN
= 36V
V
IN
= 24V
V
IN
= 12V
V
IN
= 6V
V
IN
= 3.6V
100
90
80
70
60
50
40
30
20
10
0
Die Temperature Rise vs Load
Current, V
OUT
= 5V, f
SW
= 1.5MHz
V
IN
= 36V
V
IN
= 24V
V
IN
= 12V
V
IN
= 6V
V
IN
= 3.6V
MAXIMUM DUTY CYCLE (%)
93
92
91
90
STANDARD DEMO PCB
L = 15µH MSS1048
0
0.5
1
1.5
LOAD CURRENT (A)
2
31151 G49
STANDARD DEMO PCB
L = 15µH MSS1048
0
0.5
1
1.5
LOAD CURRENT (A)
2
31151 G50
0
1000
500
1500
SWITCHING FREQUENCY (kHz)
2000
31151 G38
31151f
8
LINEAR [ LINEAR INTEGRATED SYSTEMS ]
