MAX668 Просмотр технического описания (PDF) - Maxim Integrated
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MAX668 Datasheet PDF : 18 Pages
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1.8V to 28V Input, PWM Step-Up
Controllers in µMAX
Typical Operating Characteristics (continued)
(Circuits of Figures 2, 3, 4, and 5; TA = +25°C; unless otherwise noted.)
REFERENCE VOLTAGE vs.
TEMPERATURE
1.250
1.249
1.248
1.247
1.246
1.245
1.244
1.243
1.242
1.241 VCC = 5V
1.240
-40 -20 0
20 40 60
TEMPERATURE (°C)
80 100
SWITCHING FREQUENCY vs. ROSC
500
450
400
350
300
250
200
150
100
50 VCC = 5V
0
0
100 200 300 400 500
ROSC (kΩ)
SWITCHING FREQUENCY vs.
TEMPERATURE
600
100kΩ
500
400
165kΩ
300
200
499kΩ
100
VIN = 5V
0
-40 -20 0
20 40 60
TEMPERATURE (°C)
80 100
60
50
40
30
20
10
0
100
EXT RISE/FALL TIME vs.
CAPACITANCE
tR, VCC = 3.3V
tF, VCC = 3.3V
tR, VCC = 5V
tF, VCC = 5V
1000
CAPACITANCE (pF)
10,000
6 _______________________________________________________________________________________
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