MAX15031 Datasheet, PDF (8/16 Pages) Maxim Integrated Products – 80V, 300mW Boost Converter and Current Monitor for APD Bias Applications

80V, 300mW Boost Converter and Current
Monitor for APD Bias Applications
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.)
500
480
460
440
420
400
380
360
340
320
300
2
SWITCHING FREQUENCY
vs. INPUT VOLTAGE
4
6
8
10
12
INPUT VOLTAGE (V)
FB SET-POINT VARIATION
vs. TEMPERATURE
1.277
1.257
1.247
VIN = 2.9V
VIN = 5.5V
1.237
1.227
VIN = 2.9V
VIN = 5.5V
FB RISING
FB FALLING
1.217
1.207
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
APD OUTPUT RIPPLE VOLTAGE
MAX15031 toc34
SWITCHING FREQUENCY AND
DUTY CYCLE vs. LOAD CURRENT
420
60 ^{MAX15031 toc31}
415
50
410
DUTY CYCLE
40
405
30
400
395
390
385
380
0
SWITCHING FREQUENCY ₂₀
10
MEASURED AT CN
0
1
2
3
4
LOAD CURRENT (mA)
APD OUTPUT RIPPLE VOLTAGE
MAX15031 toc33
VAPD
AC-COUPLED, 55V
200µV/div
2µs/div
APD OUTPUT RIPPLE VOLTAGE
MAX15031 toc35
VAPD
AC-COUPLED, 55V
100µV/div
VAPD
AC-COUPLED, 70V
500µV/div
0.1µF CAPACITOR CONNECTED
FROM APD TO GND.
2µs/div
0.1µF CAPACITOR CONNECTED
FROM APD TO GND.
2µs/div
8 _______________________________________________________________________________________