Datasheet

LTC3805
5
3805fg
TEMPERATURE (°C)
–75 –50
788
V
FB
VOLTAGE (mV)
792
800
808
796
804
812
–25 0 25 50
3805 G01
75 100 125 150
Reference Voltage
vs Temperature
Reference Voltage
vs Supply Voltage
Oscillator Frequency vs R
FS
Oscillator Frequency
vs Supply Voltage
Oscillator Frequency
vs Temperature
RUN Undervoltage Lockout
Thresholds vs Temperature
RUN Hysteresis Current
vs Temperature
V
CC
Undervoltage Lockout
Thresholds vs Temperature
Start-Up I
CC
Supply Current
vs Temperature
typical perForMance characteristics
R
FS
(kΩ)
0
f
OSC
(kHz)
400
500
600
400
3805 G03
300
200
0
100
200
300
100
800
700
V
CC
(V)
4
0.799700
V
FB
(V)
0.799800
0.799900
0.800000
0.800100
0.800200
0.800300
6 85 7 9 10
3805 G02
V
CC
(V)
4
201
202
203
8
3805 G04
200
199
5 6 7 9
198
197
196
f
OSC
(kHz)
R
FS
= 124kΩ
TEMPERATURE (°C)
–75 –50
198
OSCILLATOR FREQUENCY (kHz)
199
200
201
202
–25 0 25 50
3805 G05
75 100 125 150
R
FS
= 124kΩ
TEMPERATURE (°C)
–75 –50
1.170
RUN VOLTAGE (V)
1.175
1.185
1.195
1.180
1.190
1.200
1.205
–25 0 25 50
3805 G06
75 100 125 150
V
RUN(ON)
V
RUN(OFF)
TEMPERATURE (°C)
–75 –50
4.70
I
RUN(HYST)
4.80
5.00
4.90
5.10
5.20
–25 0 25 50
3805 G07
75 100 125 150
TEMPERATURE (°C)
–75 –50
3.50
V
CC
UNDERVOLTAGE LOCKOUT (V)
4.50
6.50
8.50
5.50
7.50
9.50
–25 0 25 50
3805 G08
75 100 125 150
V
TURN(ON)
V
TURN(OFF)
TEMPERATURE (°C)
–75 –50
30
START-UP SUPPLY CURRENT (µA)
32
36
44
34
40
48
50
38
42
46
–25 0 25 50
3805 G09
75 100 125 150