Datasheet

LTC3880/LTC3880-1
11
3880fc
For more information www.linear.com/LTC3880
TYPICAL PERFORMANCE CHARACTERISTICS
Soft-Off Ramp
Current Sense Threshold
vs I
TH
Voltage (Low Range)
Maximum Current Sense Threshold
vs Duty Cycle, V
OUT
= 0V
Maximum Current Sense Threshold
vs Common Mode Voltage
Regulated Output
vs Temperature
SHARE_CLK Frequency
vs Temperature
SHARE-CLK Frequency vs V
IN
Quiescent Current vs Temperature V
OUT
Measurement vs V
OUT
RUN
2V/DIV
V
OUT
1V/DIV
5ms/DIVt
FALL
= 5ms
t
DELAY
= 10ms
3880 G10
V
ITH
(V)
0
CURRENT LIMIT (A) WITH 1mΩ SENSE RESISTOR
10
20
30
1.5
2.5
3880 G11
0
–10
–20
0.5 1 2
40
50
60
V
SENSE
50mV
V
SENSE
25mV
DUTY CYCLE (%)
0
MAXIMUM CURRENT SENSE THRESHOLD (mV)
51
53
55
90
3880 G12
49
47
50
52
54
48
46
45
30
50
70
50mV SENSE CONDITION
COMMON MODE VOLTAGE (V)
0
45
MAXIMUM CURRENT SENSE THRESHOLD (mV)
47
49
51
1
2
3 4
3880 G13
5
53
55
46
48
50
52
54
6
50mV SENSE CONDITION
TEMPERATURE (°C)
–50
0.4975
V
OUT
(V)
0.4980
0.4990
0.4995
0.5000
0.5025
0.5010
–10
30
50
3880 G14
0.4985
0.5015
0.5020
0.5005
–30 10
70
90
110
TEMPERATURE (°C)
–50
90
SHARE_CLK FREQUENCY (kHz)
95
100
105
110
–30 –10 10 30
3880 G15
50 70 90 110
V
IN
(V)
6
SHARE_CLOCK FREQUENCY (kHz)
100.0
100.5
22
3880 G16
99.5
99.0
10
14
16
2826
101.0
18
8
12
24
20
TEMPERATURE (°C)
–50
15
QUIESCENT CURRENT (mA)
20
25
30
–30 –10 10 30
3880 G17
50 70 90 110
V
OUT
(V)
0.5
MEASSURED ERROR (mV)
0.40
0.30
0.20
0.10
0
–0.10
–0.20
–0.30
–0.40
4.5
3880 G18
1.5 2.5 3.5 5.541 2 3 5