Datasheet

LTC3890
7
3890fc
TYPICAL PERFORMANCE CHARACTERISTICS
TRACK/SS Pull-Up Current
vs Temperature
Shutdown (RUN) Threshold
vs Temperature
Regulated Feedback Voltage
vs Temperature
SENSE
–
Pin Total Input Bias Current
vs Temperature
Shutdown Current
vs Input Voltage
Oscillator Frequency
vs Temperature
Undervoltage Lockout Threshold
vs Temperature
Oscillator Frequency
vs Input Voltage
Shutdown Current vs Temperature
INPUT VOLTAGE (V)
0
SHUTDOWN CURRENT (µA)
10
15
30
25
20 30 35 40 45 50 55 60 6515105 25
3890 G23
5
20
INPUT VOLTAGE (V)
344
OSCILLATOR FREQUENCY (kHz)
348
350
356
20 30 35 40 45 50 55 60 6515105 25
3890 G26
346
352
354
FREQ = GND
TEMPERATURE (°C)
–75
SENSE
–
CURRENT (µA)
50250
3890 G22
400
300
–25–50 75
800
700
600
500
200
100
0
–100
125100 150
V
OUT
> INTV
CC
+ 0.5V
V
OUT
< INTV
CC
– 0.5V
TEMPERATURE (°C)
–75
REGULATED FEEDBACK VOLTAGE (mV)
806
0 25 50
3890 G21
800
796
–50 –25 75
794
792
808
804
802
798
100 125 150
TEMPERATURE (°C)
–75
FREQUENCY (kHz)
500
550
600
0 25 50 100
3890 G24
450
400
–50 –25
75 125 150
350
300
FREQ = GND
FREQ = INTV
CC
TEMPERATURE (°C)
–75
INTV
CC
VOLTAGE (V)
3.7
3.8
3.9
4.1
–25
75
100
3890 G25
3.6
4.2
4.0
–50
0 25 50
125
150
FALLING
RISING
TEMPERATURE (°C)
8
SHUTDOWN CURRENT (µA)
12
14
22
20
25 50 75 100 125 150–25–75 –50 0
3890 G27
10
16
18
V
IN
= 12V
TEMPERATURE (°C)
–75
0.90
TRACK/SS CURRENT (µA)
0.95
1.00
1.05
1.10
–50 –25 0 755025
3890 G19
100 125 150
TEMPERATURE (°C)
–75
RUN PIN VOLTAGE (V)
1.30
1.35
1.40
0 50 75
3890 G20
1.25
1.20
–50 –25
25 100 125 150
1.15
1.00
1.05
1.10
RUN1 FALLING
RUN2 RISING
RUN1 RISING
RUN2 FALLING
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