LTC3829 Datasheet, PDF (7/40 Pages) Linear Technology – 3-Phase, Single Output Synchronous Step-Down DC/DC Controller with Diffamp

Typical Performance Characteristics
LTC3829
Quiescent Current vs Input
Voltage without EXTV_CC
5.5
5.3
5.1
4.9
4.7
4.5
4.3
4.1
3.9
3.7
3.5
4
14
24
INPUT VOLTAGE (V)
34 40
3829 G08
INTV_CC Line Regulation
5.25
5.00
4.75
4.50
4.25
4.00
3.75
3.50
3.25
3.00
2.75
2.50
2.25
2.00
0 5 10 15 20 25 30
INPUT VOLTAGE (V)
35 40
3829 G09
Current Sense Threshold
vs I_TH Voltage
80
I_LIM = INTV_CC
60
I_LIM = FLOAT
40
20
I_LIM = GND
0
–20
–40
0
0.5
1
1.5
2
V_ITH (V)
3829 G10
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
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
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
1.0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3829 G15
3829f