LTC3784_15 Datasheet, PDF (6/38 Pages) Linear Technology – 60V PolyPhase Synchronous Boost Controller

LTC3784
Typical Performance Characteristics T_A = 25°C unless otherwise noted.
Soft-Start Pull-Up Current
vs Temperature
11.0
10.5
10.0
9.5
9.0
–60 –35 –10 15 40 65 90
TEMPERATURE (°C)
115 140
3784 G10
Shutdown Current vs Temperature
6.0
V_IN = 12V
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
–60 –35 –10 15 40 65 90
TEMPERATURE (°C)
115 140
3784 G11
Quiescent Current vs Temperature
50
V_IN = 12V
45 ^VFB ^{= 1.25V}
RUN = GND
40
35
30
25
20
15
10
–60 –35 –10 15 40 65 90
TEMPERATURE (°C)
115 140
3784 G13
Shutdown (RUN) Threshold
vs Temperature
1.40
1.35
1.30
RUN RISING
1.25
1.20
RUN FALLING
1.15
1.10
–60 –35 –10 15 40 65 90
TEMPERATURE (°C)
115 140
3784 G14
Shutdown Current vs Input Voltage
12.5
V_IN = 12V
10.0
7.5
5.0
2.5
0
5 10 15 20 25 30 35 40 45 50 55 60 65
INPUT VOLTAGE (V)
3784 G12
Undervoltage Lockout Threshold
vs Temperature
4.4
4.3
4.2
INTV_CC RISING
4.1
4.0
3.9
INTV_CC FALLING
3.8
3.7
3.6
3.5
3.4
–60 –35 –10 15 40 65 90 115 140
TEMPERATURE (°C)
3784 G15
INTV_CC Line Regulation
5.5
5.4
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
0 5 10 15 20 25 30 35 40 45 50 55 60 65
INPUT VOLTAGE (V)
3784 G16
INTV_CC vs INTV_CC Load Current
5.50
V_IN = 12V
5.45
5.40
EXTV_CC = 0V
5.35
5.30
5.25
5.20
EXTV_CC = 6V
5.15
5.10
5.05
5.00
0
20 40 60 80 100 120 140 160 180 200
INTV_CC LOAD CURRENT (mA)
3784 G17
6
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EXTV_CC Switchover and INTV_CC
Voltages vs Temperature
6.0
5.8
5.6
INTV_CC
5.4
5.2
5.0
4.8
EXTV_CC RISING
4.6
4.4
EXTV_CC FALLING
4.2
4.0
–60 –35 –10 15 40 65 90
TEMPERATURE (°C)
115 140
3784 G18
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