LTC3124_15 Datasheet, PDF (5/28 Pages) Linear Technology – 15V, 5A 2-Phase Synchronous Step-Up DC/DC Converter with Output Disconnect

LTC3124
TYPICAL PERFORMANCE CHARACTERISTICS
Configured as front page application at T_A = 25°C, unless otherwise specified.
PWM Mode Maximum Output
Current vs V_IN
4.0
3.6
V_OUT = 5V
V_OUT = 7.5V
3.2
V_OUT = 12V
V_OUT = 15V
2.8
2.4
2.0
1.6
1.2
0.8
0.4
0
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
V_IN (V)
3124 G10
Peak Current Limit Change
vs Temperature
2
1
0
–1
–2
–3
–4
–50
–10 30
70 110 150
TEMPERATURE (°C)
3124 G11
Burst Mode Output Current vs V_IN
400
350
300
250
200
150
100
50
0
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
V_IN, FALLING (V)
3124 G13
V_OUT = 2.5V
V_OUT = 5V
V_OUT = 7.5V
V_OUT = 12V
V_OUT = 15V
Burst Mode No-Load Input
Current vs V_IN
10000
1000
V_OUT = 15V
V_OUT = 12V
V_OUT = 7.5V
V_OUT = 5V
V_OUT = 2.5V
100
10
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
V_IN, FALLING (V)
3124 G14
PWM Operation No-Load Input
Current vs V_IN
200
180
V_OUT = 15V
V_OUT = 12V
160
V_OUT = 7.5V
V_OUT = 5V
140
V_OUT = 2.5V
120
100
80
60
40
20
0
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
V_IN (V)
3124 G12
Burst Mode Quiescent Current
Change vs Temperature
75
60
45
30
15
0
–15
–50
–10 30
70 110 150
TEMPERATURE (°C)
3124 G15
SD Pin Threshold
RT vs Frequency
V_OUT
5V/DIV
900mV
V_SD
500mV/DIV
400mV
1s/DIV
3124 G16
100
10
10
100
1000
FREQUENCY (kHz)
3000
3124 G17
For more information www.linear.com/LTC3124
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