Typical operating characteristics (continued) – Rainbow Electronics MAX15031 User Manual
Page 8
MAX15031
80V, 300mW Boost Converter and Current
Monitor for APD Bias Applications
8
_______________________________________________________________________________________
SWITCHING FREQUENCY
vs. INPUT VOLTAGE
MAX15031 toc30
INPUT VOLTAGE (V)
SWITCHING FREQUENCY (kHz)
10
8
6
4
320
340
360
380
400
420
440
460
480
500
300
2
12
FB SET-POINT VARIATION
vs. TEMPERATURE
MAX15031 toc32
TEMPERATURE (
°C)
FB SET-POINT VOLTAGE VARIATION (V)
110
95
80
65
50
35
20
5
-10
-25
1.217
1.227
1.237
1.247
1.257
1.277
1.207
-40
125
V
IN
= 5.5V
V
IN
= 2.9V
V
IN
= 2.9V
V
IN
= 5.5V
FB RISING
FB FALLING
APD OUTPUT RIPPLE VOLTAGE
MAX15031 toc34
2
µs/div
V
APD
AC-COUPLED, 55V
100
µV/div
0.1
µF CAPACITOR CONNECTED
FROM APD TO GND.
SWITCHING FREQUENCY AND
DUTY CYCLE vs. LOAD CURRENT
MAX15031 toc31
LOAD CURRENT (mA)
SWITCHING FREQUENCY (kHz)
DUTY CYCLE
3
2
1
385
390
395
400
405
410
415
420
380
10
40
30
20
50
60
0
0
4
DUTY CYCLE
SWITCHING FREQUENCY
MEASURED AT CN
APD OUTPUT RIPPLE VOLTAGE
MAX15031 toc33
2
µs/div
V
APD
AC-COUPLED, 55V
200
µV/div
APD OUTPUT RIPPLE VOLTAGE
MAX15031 toc35
2
µs/div
V
APD
AC-COUPLED, 70V
500
µV/div
0.1
µF CAPACITOR CONNECTED
FROM APD TO GND.
Typical Operating Characteristics (continued)
(V
PWR
= V
IN
= 3.3V, V
OUT
= 70V, circuit of Figure 3 (Figure 4 for V
IN
> 5.5V), unless otherwise noted.)