Rainbow Electronics MAX5043 - Manual (Page 4)

MAX5042/MAX5043
Two-Switch Power ICs with Integrated
Power MOSFETs and Hot-Swap Controller
4 _______________________________________________________________________________________
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
SYNC Leakage Current ±1 µA
SYNC Maximum Frequency f SYNC 2.4 MHz
SYNC On-Time 50 ns
SYNC Off-Time 200 ns
PWM LOGIC
PWM Comparator Propagation
Delay
70 ns
PPWM to XFRMRL Delay PPWM rising 120 ns
DRVDEL Reference Voltage 1.14 1.38 V
PPWM Output High Sourcing 2mA 2.8 V
PPWM Output Low Sinking 2mA 0.4 V
PWMSD Logic High 3.5 V
PWMSD Logic Low 0.8 V
PWMSD Leakage Current ±1 µA
SOFT-START
Soft-Start Current I CSS 33 µA
Minimum OPTO Voltage CSS = 0, sinking 2mA 1.4 V
RAMP GENERATOR
Minimum RCFF Voltage RCFF sinking 2mA 2.1 V
RCFF Leakage ±0.1 ±1 µA
OVERLOAD FAULT
FLTINT Pulse Current I FLTINT 80 µA
FLTINT Trip Point 2.0 2.7 3.5 V
FLTINT Hysteresis 0.75 V
INTERNAL POWER FETs
On-Resistance R DSON
V D R V I N = V BS T = 9V , V X F RM RH = V S R C = 0,
I DS = 190mA
75 200 m
Ω
Off-State Leakage Current 10 µA
Total Gate Charge Per FET Inferred from supply current with V
D S
= 50V 45 nC
HIGH-SIDE DRIVER
Low-to-High Latency
Driver delay until FET V GS reaches 0.9 x
(V BST - V XFRMRH )
80 ns
High-to-Low Latency
Driver delay until FET V GS reaches 0.1 x
(V BST - V XFRMRH )
45 ns
Output Drive Voltage BST to XFRMRH with high side on 8 V
LOW-SIDE DRIVER
Low-to-High Latency
Driver delay until FET V GS reaches 0.9 x
V DRVIN
80 ns