Datasheet

LTC3788
8
3788fc
SENSE Pin Input Current
vs Temperature
Oscillator Frequency
vs Temperature
Maximum Current Sense
Threshold vs I
TH
Voltage
SENSE Pin Input Current
vs V
SENSE
Voltage
SENSE Pin Input Current
vs I
TH
Voltage
Oscillator Frequency
vs Input Voltage
Typical perForMance characTerisTics
TEMPERATURE (°C)
–45
300
FREQUENCY (kHz)
350
600
450
5
55
80
500
550
400
–20
30
105
130
3788 G19
FREQ = GND
FREQ = INTV
CC
15
5 10 20
25 30 35 40
INPUT VOLTAGE (V)
OSCILLATOR FREQUENCY (kHz)
344
354
356
358
360
350
342
352
340
348
346
3788 G20
FREQ = GND
I
TH
VOLTAGE (V)
0
MAXIMUM CURRENT SENSE VOLTAGE (mV)
80
120
100
0.6 1.0
3788 G21
40
0
0.2 0.4
0.8 1.2 1.4
–40
60
20
–20
–60
I
LIM
= GND
I
LIM
= FLOAT
I
LIM
= INTV
CC
Burst Mode
OPERATION
PULSE SKIPPING MODE
FORCED CONTINUOUS MODE
TEMPERATURE (°C)
–45
SENSE CURRENT (µA)
5
55
80
0
80
40
160
200
240
120
20
100
60
180
220
260
140
–20
30
105
130
3788 G22
SENSE
+
PIN
SENSE
–
PIN
V
SENSE
= 12V
I
LIM
= FLOAT
I
TH
VOLTAGE (V)
0
SENSE CURRENT (µA)
1
2
2.5
0
80
40
160
200
240
120
20
100
60
180
220
260
140
0.5
1.5
3
3788 G23
SENSE
+
PIN
SENSE
–
PIN
V
SENSE
= 12V
I
LIM
= INTV
CC
I
LIM
= FLOAT
I
LIM
= GND
I
LIM
= INTV
CC
I
LIM
= FLOAT
I
LIM
= GND
V
SENSE
COMMON MODE VOLTAGE (V)
2.5
SENSE CURRENT (µA)
17.5
27.5
32.5
0
80
40
160
200
240
120
20
100
60
180
220
260
140
7.5 12.5
22.5
37.5
3788 G24
SENSE
+
PIN
SENSE
–
PIN
I
LIM
= INTV
CC
I
LIM
= FLOAT
I
LIM
= GND
I
LIM
= INTV
CC
I
LIM
= FLOAT
I
LIM
= GND