Rainbow Electronics MAX15038 - Manual (Page 4)

MAX15038
4A, 2MHz Step-Down Regulator
with Integrated Switches
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V IN = V EN = 5V, C VDD = 2.2µF, T A = T J = -40°C to +85°C, typical values are at T A = +25°C, circuit of Figure 1, unless otherwise
noted.) (Note 3)
PARAMETER CONDITIONS MIN TYP MAX UNITS
R FREQ = 49.9k Ω 0.9 1 1.1
LX Switching Frequency V IN = 2.9V to 5V
R FREQ = 23.6k Ω 1.8 2 2.2
MHz
Switching Frequency Range 500 2000 kHz
LX Minimum Off-Time 78 ns
LX Maximum Duty Cycle R FREQ = 49.9k Ω 92 95 %
LX Minimum Duty Cycle R FREQ = 49.9k Ω 5 15 %
Average Short-Circuit IN Supply
Current
OUT connected to GND, V IN = 5V 0.15 A
RMS LX Output Current 4 A
ENABLE
EN Input Logic-Low Threshold EN falling 0.9 V
EN Input Logic-High Threshold EN rising 1.5 V
EN Input Current V EN = 0 or 5V, V IN = 5V 0.01 µA
MODE
Logic-low, falling 26
Logic V DD /2 or floating, rising 50 MODE Input-Logic Threshold
Logic-high, rising 74
% V DD
MODE Input-Logic Hysteresis MODE falling 5 % V DD
MODE = GND -5
MODE Input Bias Current
MODE = V DD 5
µA
SS
SS Current V
SS
= 0.45V, V
REFIN
= 0.6V, sourcing 6.7 8 9.3 µA
THERMAL SHUTDOWN
Thermal-Shutdown Threshold Rising 165 °C
Thermal-Shutdown Hysteresis 25 °C
POWER-GOOD (PWRGD)
V FB falling, V REFIN = 0.6V 88 90 92
Power-Good Threshold Voltage
V FB rising, V REFIN = 0.6V 92.5
%
V REFIN
Power-Good Edge Deglitch V FB rising or falling 48
Clock
cycles
PWRGD Output Voltage Low I PWRGD = 4mA 0.03 0.1 V
PWRGD Leakage Current V IN = V PWRGD = 5V, V FB = 0.7V, V REFIN = 0.6V 0.01 µA
HICCUP OVERCURRENT LIMIT
Current-Limit Startup Blanking 112
Clock
cycles
Autoretry Restart Time 896
Clock
cycles