Datasheet

LTC1772B
4
1772bfa
TYPICAL PERFORMANCE CHARACTERISTICS
Reference Voltage
vs Temperature
Undervoltage Lockout Trip
Voltage vs Temperature
Shutdown Threshold
vs Temperature
Maximum (V
IN
– SENSE
–
) Voltage
vs Duty Cycle
Normalized Oscillator Frequency
vs Temperature
TEMPERATURE (°C)
–55
775
V
FB
VOLTAGE (mV)
780
790
795
800
825
810
–15
25
45 125
1772 G01
785
815
820
805
–35 5
65
85
105
V
IN
= 4.2V
TEMPERATURE (°C)
–55
–10
NORMALIZED FREQUENCY (%)
–8
–4
–2
0
10
4
–15
25
45 125
1772 G02
–6
6
8
2
–35 5
65
85
105
V
IN
= 4.2V
DUTY CYCLE (%)
20 30
TRIP VOLTAGE (mV)
100
1772 G04
40 50
60 70
80 90
120
110
100
90
80
70
60
50
40
V
IN
= 4.2V
T
A
= 25°C
TEMPERATURE (°C)
–55
200
I
TH
/RUN VOLTAGE (mV)
240
320
360
400
600
480
–15
25
45 125
1772 G05
280
520
560
440
–35 5
65
85
105
V
IN
= 4.2V
TEMPERATURE (°C)
–55
1.84
TRIP VOLTAGE (V)
1.88
1.96
2.00
2.04
2.24
2.12
–15
25
45 125
1772 G03
1.92
2.16
2.20
2.08
–35 5
65
85
105
V
IN
FALLING