Rainbow Electronics MAX15031 - Manual (Page 3)

MAX15031
80V, 300mW Boost Converter and Current
Monitor for APD Bias Applications
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Note 2: All minimum/maximum parameters are tested at T A = +125°C. Limits over temperature are guaranteed by design.
Note 3: Guaranteed by design and not production tested.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Soft-Start Duration 8 ms
Soft-Start Steps (0.25 x I LIM_LX ) to I LIM_LX 32 Steps
CONTROL INPUT (CNTRL)
Maximum Control Input Voltage
Range
FB set point is regulated to V CNTRL 1.25 V
CURRENT MONITOR
Bias Voltage Range V BIAS 10 76 V
I APD = 500nA 100 µA
Bias Quiescent Current I BIAS
I APD = 2mA 3.2 mA
Voltage Drop V DROP I APD = 2mA, V DROP = V BIAS - V APD 1 V
I APD = 500nA 1 G Ω
Dynamic Output Resistance at
MOUT
R MOUT
I APD = 2.5mA 890 M Ω
MOUT Output Leakage APD is unconnected 1 nA
Output Clamp Voltage
V MOUT -
V CLAMP
Forward diode current = 1mA 0.5 0.73 0.95 V
Output Clamp Leakage Current V
BIAS
= V
CLAMP
= 76V 1 nA
Output-Voltage Range V
MOUT
10V ≤ V
BIAS
≤ 76V, 0 ≤ I
APD
≤ 1mA, CLAMP
is unconnected
V BIAS -
1V
V
I APD = 500nA 0.095 0.1 0.11
Current Gain I MOUT /I APD
I APD = 2mA 0.965 0.1 0.1035
I APD = 500nA
(Note 3)
-1000 +300 +1500
Power-Supply Rejection Ratio PSRR
( ∆I
MOUT /I MOUT )/ ∆V
BIAS ,
V BIAS = 10V to 76V I APD = 5µA to
1mA
-250 +24 +250
ppm/V
APD Input Current Limit I LIM_APD V APD = 35V, R LIM = 3.3k Ω 3.15 3.75 4.35 mA
Current-Limit Adjustment Range 12.45k Ω ≥ R
LIM
≥ 2.5kΩ 1 5 mA
I APD = 500nA 7.5 ms
Power-Up Settling Time t S
I MOUT settles to within
0.1%, 10nF connected
from APD to ground
I APD = 2.5mA 90 µs
LOGIC INPUTS/OUTPUTS
SHDN Input-Voltage Low V IL 0.8 V
SHDN Input-Voltage High V IH 2.4 V
ILIM Output-Voltage Low V OL I LIM = 2mA 0.3 V
ILIM Output Leakage Current I OH V ILIM = 11V 1 µA
THERMAL PROTECTION
Thermal Shutdown Temperature rising +160 °C
Thermal Shutdown Hysteresis 10 °C
ELECTRICAL CHARACTERISTICS (continued)
(V IN = V PWR = 3.3V. V SHDN = 3.3V. C IN = C PWR = 10µF. C CP = 10nF, V CNTRL = V IN . V RLIM = 0. V PGND = V SGND = 0. V BIAS = 40V.
APD = unconnected. CLAMP = unconnected. ILIM = unconnected, MOUT = unconnected. T A = T J = -40°C to +125°C, unless other-
wise noted. Typical values are at T A = +25°C.) (Note 2)