Datasheet

LTC3810
6
3810fc
Frequency vs Load Current
Current Sense Threshold
vs I
TH
Voltage On-Time vs I
ON
Current
On-Time vs V
ON
Voltage On-Time vs Temperature Current Limit Foldback
Maximum Current Sense
Threshold vs V
RNG
Voltage
Maximum Current Sense
Threshold vs Temperature
Feedback Reference Voltage
vs Temperature
TYPICAL PERFORMANCE CHARACTERISTICS
LOAD CURRENT (A)
0
250
300
350
4
3810 G10
200
150
123 5
100
50
0
FREQUENCY (kHz)
FORCED
CONTINUOUS
PULSE SKIP
FRONT PAGE CIRCUIT
I
TH
VOLTAGE (V)
0
–400
CURRENT SENSE THRESHOLD (mV)
–300
–200
–100
0
100
200
400
0.5
1 1.5 2
3810 G11
2.5 3
300
V
RNG
= 2V
1.4V
1V
0.7V
0.5V
I
ON
CURRENT (μA)
10
10
ON-TIME (ns)
100
1000
10000
100 1000 10000
3810 G12
V
ON
= INTV
CC
V
ON
VOLTAGE (V)
0
400
500
700
1.5 2.5
3810 G13
300
200
0.5 1
23
100
0
600
ON-TIME (ns)
I
ON
= 300μA
TEMPERATURE (°C)
–50
ON-TIME (ns)
640
660
680
25 75
3810 G14
620
600
–25 0
50 100 125
580
560
I
ON
= 300μA
V
FB
(V)
0
MAXIMUM CURRENT SENSE THRESHOLD (mV)
100
150
0.8
38125 G15
50
0
0.2
0.4
0.6
250
200
V
RNG
= INTV
CC
V
RNG
VOLTAGE (V)
0.5
MAXIMUM CURRENT SENSE THRESHOLD (mV)
200
3810 G16
100
0
1 1.5
300
400
2
TEMPERATURE (°C)
–50 –25
180
MAXIMUM CURRENT SENSE THRESHOLD (mV)
200
230
0
50
75
3810 G17
190
220
210
25
100
125
V
RNG
= INTV
CC
TEMPERATURE (°C)
–50 –25
0.797
REFERENCE VOLTAGE (V)
0.799
0.803
0
50
75
3810 G18
0.798
0.802
0.801
0.800
25
100
125
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.