Instruction Manual
MAX5042/MAX5043
Two-Switch Power ICs with Integrated
Power MOSFETs and Hot-Swap Controller
_______________________________________________________________________________________ 5
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 3V
UVLO Resistance Looking into UVLO 30 75 kΩ
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