MAX15031 Datasheet, PDF (4/16 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
(V_PWR = V_IN = 3.3V, V_OUT = 70V, circuit of Figure 3 (Figure 4 for V_IN > 5.5V), unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
70
60
V_OUT = 30V
50
40
V_OUT = 55V
30
V_OUT = 70V
20
10
0
0
V_IN = 3.3V
1
2
3
4
LOAD CURRENT (mA)
MINIMUM STARTUP VOLTAGE
vs. LOAD CURRENT
2.55
2.54
2.53
2.52
2.51
2.50
2.49
2.48
0
1
2
3
4
LOAD CURRENT (mA)
EFFICIENCY vs. LOAD CURRENT
70
60
V_OUT = 30V
50
40
30
V_OUT = 55V
V_OUT = 70V
20
10
0
0
V_IN = 5V
1
2
3
4
LOAD CURRENT (mA)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
2.0
1.8
T_A = -40°C
1.6
T_A = +25°C
1.4
1.2
1.0
T_A = +85°C
0.8
0.6
T_A = +125°C
0.4
0.2
V_FB = 1.4V
0
0 1 2 3 4 5 6 7 8 9 10 11
SUPPLY VOLTAGE (V)
EFFICIENCY vs. LOAD CURRENT
70
60
50
40
V_IN = 8V
30
V_IN = 3.3V _{VIN = 5V}
20
10
0
0
V_OUT = 70V
1
2
3
4
LOAD CURRENT (mA)
NO-LOAD SUPPLY CURRENT
vs. SUPPLY VOLTAGE
60
50
T_A = +85°C
40
T_A = +25°C
30
T_A = -40°C
20
10
0
3 4 5 6 7 8 9 10 11
SUPPLY VOLTAGE (V)
EXITING SHUTDOWN
MAX15031 toc07
V_OUT
50V/div
3V
I_L
500mA/div
0mA
V_SHDN
2V/div
I_OUT = 1mA
0V
1ms/div
ENTERING SHUTDOWN
MAX15031 toc08
70V
OUTPUT VOLTAGE
50V/div
3V
INDUCTOR CURRENT
500mA/div
0mA
4ms/div
I_LOAD = 1mA
SHUTDOWN VOLTAGE
2V/div
0V
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