LTC3115-2_15 Datasheet, PDF (6/42 Pages) Linear Technology – 40V, 2A Synchronous Buck-Boost DC/DC Converter

LTC3115-2
Typical Performance Characteristics (T_A = 25°C unless otherwise specified)
Efficiency vs Switching Frequency
95
PWM MODE
BOOTSTRAPPED L = 47µH
90
V_IN = 24V
V_OUT = 5V
I_LOAD = 0.5A
85
80
NON-BOOTSTRAPPED
75
70
0
500
1000
1500
2000
SWITCHING FREQUENCY (kHz)
31152 G14
Combined V_CC/PV_CC Supply
Current vs Temperature
12.0
11.9
V_IN = 6V
V_OUT = 5V
11.8
f_SW = 1MHz
11.7
11.6
11.5
11.4
11.3
11.2
11.1
11.0
–50
0
50
100
150
TEMPERATURE (°C)
31152 G17
V_CC Voltage vs Temperature
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
–50
0
50
100
150
TEMPERATURE (°C)
31152 G20
Combined V_CC/PV_CC Supply
Current vs Switching Frequency
35
30
25
V_IN = 36V
20
V_OUT = 24V
15
V_IN = 12V
V_OUT = 5V
10
5
0
0
500
1000
1500
2000
SWITCHING FREQUENCY (kHz)
31152 G15
Output Voltage Load Regulation
0.5
0.4
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
0
0.5
1
1.5
2
LOAD CURRENT (A)
31152 G18
V_CC Regulator Load Regulation
0
–0.5
–1.0
–1.5
–2.0
–2.5
0
10
20
30
40
50
I_CC (mA)
31152 G21
Combined V_CC/PV_CC Supply
Current vs V_CC
16
14
12
f_SW = 1MHz
10
8
f_SW = 500kHz
6
4
2
0
2.5 3 3.5 4 4.5 5 5.5
V_CC (V)
31152 G16
Output Voltage Line Regulation
0.5
0.4
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
0
10
20
30
40
INPUT VOLTAGE (V)
31152 G19
V_CC Regulator Line Regulation
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
10
20
30
40
INPUT VOLTAGE (V)
31152 G22
31152fa
6
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