MAX668 Maxim, MAX668 Datasheet - Page 6

• Manufacturer Part Number: MAX668
• Description: 1.8V to 28V Input / PWM Step-Up Controllers in MAX
• Manufacturer: Maxim

1.8V to 28V Input, PWM Step-Up
Controllers in µMAX
(Circuits of Figures 2, 3, 4, and 5; T
6
_______________________________________________________________________________________
1.250
1.249
1.248
1.247
1.246
1.245
1.244
1.243
1.242
1.241
1.240
600
500
400
300
200
100
0
-40
-40
V
V
CC
IN
-20
-20
SWITCHING FREQUENCY vs.
= 5V
= 5V
REFERENCE VOLTAGE vs.
499k
100k
165k
0
0
TEMPERATURE ( C)
TEMPERATURE
TEMPERATURE ( C)
TEMPERATURE
20
20
A
40
40
= +25°C; unless otherwise noted.)
60
60
80
80
Typical Operating Characteristics (continued)
100
100
60
50
40
30
20
10
500
450
400
350
300
250
200
150
100
0
50
0
100
0
V
SWITCHING FREQUENCY vs. R
CC
= 5V
100
EXT RISE/FALL TIME vs.
CAPACITANCE (pF)
CAPACITANCE
200
R
OSC
1000
t
F
, V
(k )
CC
300
t
R
, V
= 3.3V
t
F
CC
, V
t
R
CC
= 3.3V
, V
400
= 5V
CC
OSC
= 5V
10,000
500