Datasheet

LTC3862
7
3862fc
For more information www.linear.com/LTC3862
Typical perForMance characTerisTics
Maximum Current Sense
Threshold vs Duty Cycle
RUN Threshold vs Temperature RUN Threshold vs Input Voltage
RUN (Off) Source Current vs
Temperature
RUN Source Current vs
Input Voltage
DUTY CYCLE (%)
50
MAXIMUM CURRENT SENSE THRESHOLD (mV)
60
70
80
55
65
75
20 40 60 80
3862 G18
100100 30 50 70 90
SLOPE = 0.625
SLOPE = 1.66
SLOPE = 1
TEMPERATURE (°C)
–50
1.10
RUN PIN VOLTAGE (V)
1.15
1.20
1.25
1.30
–25 0 25 50
3862 G09
75
ON
OFF
100 125 150
INPUT VOLTAGE (V)
0
RUN PIN VOLTAGE (V)
1.3
1.4
1.5
15 25 40
3862 G20
1.2
1.1
1.0
5 10
20
ON
OFF
30 35
RUN (On) Source Current vs
Temperature
TEMPERATURE (°C)
–50
–1.0
RUN PIN CURRENT (µA)
–0.9
–0.7
–0.6
–0.5
0
–0.3
0
50
75
3862 G21vv
–0.8
–0.2
–0.1
–0.4
–25 25
100
125
150
TEMPERATURE (°C)
–50
RUN PIN CURRENT (µA)
–4
–2
150
1344 G06
–6
–8
0
50
100
–25
25
75
125
0
–5
–3
–7
–1
INPUT VOLTAGE (V)
4 8
RUN PIN CURRENT (µA)
–3
–2
–1
28
3862 G23
–4
–5
12 16 20
32
24 36
–6
–7
0
Soft-Start Current vs
Soft-Start Voltage
Oscillator Frequency vs
Temperature
Soft-Start Current vs Temperature
TEMPERATURE (°C)
–50
–5.6
SOFT-START CURRENT (µA)
–5.5
–5.4
–5.3
–5.2
0 50
100
150
3862 G24
–5.1
–5.0
–25 25
75
125
SOFT-START VOLTAGE (V)
0
–6
SOFT-START CURRENT (µA)
–5
–4
–3
–2
1 2
3
4
3862 G25
–1
0
0.5 1.5
2.5
3.5
TEMPERATURE (°C)
–50
FREQUENCY (kHz)
302
303
304
305
150
3862 G26
301
300
298
0
50
100
–25
25
75
125
299
307
306