LTC3866 Datasheet, PDF (7/36 Pages) Linear Technology – Current Mode Synchronous Controller for Sub Milliohm DCR Sensing

LTC3866
Typical Performance Characteristics T_A = 25°C, unless otherwise noted.
Maximum Current Sense
Threshold Voltage vs Feedback
Voltage (Current Foldback)
40
35
I_LIM = INTV_CC
30
I_LIM = 3/4 INTV_CC
25
I_LIM = 1/2 INTV_CC
20
I_LIM = 1/4 INTV_CC
15
I_LIM = 0V
10
5
0
0 0.1 0.2 0.3 0.4 0.5 0.6
FEEDBACK VOLTAGE (V)
3866 G14
TK/SS Pull-Up Current
vs Temperature
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3866 G15
Shutdown (RUN) Threshold
vs Temperature
1.40
1.35
1.30
ON
1.25
1.20
OFF
1.15
1.10
1.05
1.00
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3866 G16
Regulated Feedback Voltage
vs Temperature
601.5
601.0
600.5
600.0
599.5
599.0
598.5
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3866 G17
Oscillator Frequency
vs Temperature
600
V_FREQ = 1.2V
575
550
525
500
475
450
425
400
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3866 G18
Oscillator Frequency
vs Input Voltage
900
800
V_FREQ = 2.5V
700
600
V_FREQ = 1.2V
500
400
300
V_FREQ = 0V
200
100
0
0 5 10 15 20 25 30 35 40
INPUT VOLTAGE (V)
3866 G19
Undervoltage Lockout Threshold
(INTV_CC) vs Temperature
4.5
4.3
RISE
4.1
3.9
FALL
3.7
3.5
3.3
3.1
2.9
2.7
2.5
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3866 G20
Shutdown Current
vs Input Voltage
100
90
80
70
60
50
40
30
20
10
0
0 5 10 15 20 25 30
INPUT VOLTAGE (V)
35 40
3866 G21
3866fa
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