LTC3787
TYPICAL PERFORMANCE CHARACTERISTICS
Oscillator Frequency
vs Temperature
600
FREQ = INTV
CC
OSCILLATOR FREQUENCY (kHz)
550
FREQUENCY (kHz)
500
450
400
FREQ = GND
350
300
–60 –35 –10 15 40 65 90 115 140
TEMPERATURE (°C)
3787 G19
Oscillator Frequency
vs Input Voltage
360
358
356
354
352
350
348
346
344
342
340
5
10
20
25
30
15
INPUT VOLTAGE (V)
35
40
3787 G20
FREQ = GND
Maximum Current Sense
Threshold vs I
TH
Voltage
MAXIMUM CURRENT SENSE VOLTAGE (mV)
120
100
80
60
40
20
0
–20
–40
–60
0
0.2
0.4
0.6 0.8 1.0
I
TH
VOLTAGE (V)
1.2
1.4
3787 G21
SENSE Pin Input Current
vs Temperature
260
V
SENSE
= 12V
240
I
LIM
= FLOAT
220
SENSE
+
PIN
200
180
160
140
120
100
80
60
40
20
SENSE
–
PIN
0
–60 –35 –10 15 40 65 90 115 140
TEMPERATURE (°C)
PULSE-SKIPPING MODE
Burst Mode
OPERATION
SENSE CURRENT (μA)
I
LIM
= GND
I
LIM
= FLOAT
I
LIM
= INTV
CC
FORCED CONTINUOUS MODE
3787 G22
SENSE Pin Input Current
vs I
TH
Voltage
260
240
220
200
180
160
140
120
100
80
60
40
20
0
0
V
SENSE
= 12V
SENSE
+
PIN
I
LIM
= INTV
CC
I
LIM
= FLOAT
I
LIM
= GND
SENSE CURRENT (μA)
260
240
220
200
180
160
140
120
100
80
60
40
20
0
SENSE Pin Input Current
vs V
SENSE
Voltage
SENSE
+
PIN
I
LIM
= INTV
CC
I
LIM
= FLOAT
I
LIM
= GND
SENSE CURRENT (μA)
SENSE
–
PIN
0.5
I
LIM
= INTV
CC
I
LIM
= FLOAT
I
LIM
= GND
2
1.5
1
I
TH
VOLTAGE (V)
2.5
3
3787 G23
SENSE
–
PIN
2.5
I
LIM
= INTV
CC
I
LIM
= FLOAT
I
LIM
= GND
7.5 12.5 17.5 22.5 27.5 32.5 37.5
V
SENSE
COMMON MODE VOLTAGE (V)
3787 G24
3787fc
8
LINEAR [ LINEAR INTEGRATED SYSTEMS ]
