Rainbow Electronics MAX5043 - Manual (Page 5)

MAX5042/MAX5043
Two-Switch Power ICs with Integrated
Power MOSFETs and Hot-Swap Controller
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ELECTRICAL CHARACTERISTICS (continued)
(V POSINPWM = 20V to 76V, V REG15 = 18V, C REG15 = 4.7µF, C REG9 = 1µF, C REG5 = 1µF, R RCOSC = 24kΩ, C RCOSC = 100pF, C BST =
0.22µF, R DRVDEL = 10kΩ, C DRVDEL = 0.22µF, V CSS = V CSP = V CSN = V RAMP = V PWMNEG = V NEGIN = 0, T A = -40°C to +125°C,
unless otherwise noted. Typical values are at V POSINPWM = 48V, T A = +25°C, unless otherwise noted. All voltages are referred to
PWMNEG, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
High-to-Low Latency
Driver delay until FET V GS reaches
0.1 x V DRVIN
45 ns
CURRENT-SENSE COMPARATOR
Current-Limit-Comparator
Threshold Voltage
140 156 172 mV
Current-Limit-Comparator
Propagation Delay
10mV overdrive 40 ns
CURRENT-SENSE AMPLIFIER
Current Amplifier Gain V CSN = 0, V CSP = 0 to 0.35V 9.75 10 10.25 V/V
Input Voltage Offset V CN = V CSP = -0.3V to +0.3V 185 200 230 mV
Input Common-Mode Range -0.3 +0.3 V
Input Differential-Mode Range Inferred from current amplifier gain test 0.35 V
CSP Input Bias Current V CSP = -0.3V to +0.3V, V CSN = 0 -160 -40 µA
CSN Input Bias Current V CSP = -0.3V to +0.3V, V CSN = 0 -160 -30 µA
Settling Time
V CSN = 0, V CSP steps from 0 to 0.2V, 10%
settling time, C L = 20pF
70 ns
3dB Bandwidth 7 MHz
BOOST VOLTAGE CIRCUIT
QB R DS(ON) Sinking 100mA 10 20 Ω
Driver Output Delay 200 ns
One-Shot Pulse Width 300 ns
THERMAL SHUTDOWN
Shutdown Temperature Temperature rising 150 °C
Thermal Hysteresis 14.5 °C
PWM CONVERTER UNDERVOLTAGE LOCKOUT (UVLO)
Preset UVLO Threshold Measured at POSINPWM rising 28 31 34 V
UVLO Threshold Hysteresis 3 V
UVLO Resistance Looking into UVLO 30 75 k Ω
UVLO Trip Point Measured at UVLO rising 1.15 1.27 1.39 V
UVLO Hysteresis +127 mV
Preset DEN Threshold
MAX5043 only, measured at POSINPWM
rising
27 34 V
DEN Threshold Hysteresis MAX5043 only 3.1 V
DEN Startup Delay MAX5043 only 3.5 12 27.0 ms
DEN Turn-Off Delay MAX5043 only 0.2 0.7 1.5 ms
DEN Trip Point
MAX5043 only, rising with respect to
PWMNEG
1.11 1.35 V