LTC3829_15 Datasheet, PDF (7/40 Pages) Linear Technology – 3-Phase, Single Output Synchronous Step-Down DC/DC Controller with Diffamp

LTC3829
TYPICAL PERFORMANCE CHARACTERISTICS
Maximum Current Sense Threshold
vs Common Mode Voltage
90
80
I_LIM = INTV_CC
70
60
I_LIM = FLOAT
50
40
I_LIM = GND
30
20
10
0
0
1
2
3
4
5
V_SENSE COMMON MODE VOLTAGE (V)
3829 G11
Maximum Current Sense Voltage
vs Duty Cycle
100
90
80
I_LIM = INTV_CC
70
60
I_LIM = FLOAT
50
40
I_LIM = GND
30
20
10
0
0 10 20 30 40 50 60 70 80 90 100
DUTY CYCLE (%)
3829 G12
TK/SS Pull-Up Current
vs Temperature
1.5
Shutdown (RUN) Threshold
vs Temperature
1.4
1.4
1.3
ON
1.3
1.2
OFF
1.2
1.1
1.1
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3829 G14
Oscillator Frequency
vs Temperature
700
V_FREQ ≥ 2.4V
600
V_FREQ = 1.2V
500
400
300
V_FREQ = 0V
200
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3829 G17
1.0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3829 G15
Undervoltage Lockout Threshold
(INTV_CC) vs Temperature
4.3
4.1
RISING
3.9
3.7
3.5
FALLING
3.3
3.1
2.9
2.7
2.5
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3829 G18
Maximum Current Sense Voltage
vs Feedback Voltage
(Current Foldback)
100
90
80
I_LIM = INTV_CC
70
60
I_LIM = FLOAT
50
40
I_LIM = GND
30
20
10
0
0 0.1 0.2 0.3 0.4 0.5 0.6
FEEDBACK VOLTAGE (V)
3829 G13
Regulated Feedback Voltage
vs Temperature
0.604
0.602
0.600
0.598
0.596
0.594
0.592
–50 –25
0 25 50 75
TEMPERATAURE (°C)
100 125
3829 G16
Oscillator Frequency
vs Input Voltage
800
V_FREQ ≥ 2.4V
600
V_FREQ = 1.2V
400
V_FREQ = 0V
200
0
0 5 10 15 20 25 30 35 40
INPUT VOLTAGE (V)
3829 G19
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