MAX15038 Datasheet, PDF (4/18 Pages) Maxim Integrated Products – 4A, 2MHz Step-Down Regulator with Integrated Switches

4A, 2MHz Step-Down Regulator
with Integrated Switches
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
LX Switching Frequency
Switching Frequency Range
LX Minimum Off-Time
LX Maximum Duty Cycle
LX Minimum Duty Cycle
Average Short-Circuit IN Supply
Current
RMS LX Output Current
ENABLE
EN Input Logic-Low Threshold
EN Input Logic-High Threshold
EN Input Current
MODE
MODE Input-Logic Threshold
MODE Input-Logic Hysteresis
MODE Input Bias Current
SS
SS Current
THERMAL SHUTDOWN
Thermal-Shutdown Threshold
Thermal-Shutdown Hysteresis
POWER-GOOD (PWRGD)
Power-Good Threshold Voltage
V_IN = 2.9V to 5V
CONDITIONS
R_FREQ = 49.9kΩ
R_FREQ = 23.6kΩ
R_FREQ = 49.9kΩ
R_FREQ = 49.9kΩ
OUT connected to GND, V_IN = 5V
EN falling
EN rising
V_EN = 0 or 5V, V_IN = 5V
Logic-low, falling
Logic V_DD/2 or floating, rising
Logic-high, rising
MODE falling
MODE = GND
MODE = V_DD
V_SS = 0.45V, V_REFIN = 0.6V, sourcing
Rising
V_FB falling, V_REFIN = 0.6V
V_FB rising, V_REFIN = 0.6V
Power-Good Edge Deglitch
V_FB rising or falling
PWRGD Output Voltage Low
PWRGD Leakage Current
HICCUP OVERCURRENT LIMIT
I_PWRGD = 4mA
V_IN = V_PWRGD = 5V, V_FB = 0.7V, V_REFIN = 0.6V
MIN TYP MAX UNITS
0.9
1
1.1
MHz
1.8
2
2.2
500
2000 kHz
78
ns
92
95
%
5
15
%
0.15
A
4
A
0.9
V
1.5
V
0.01
µA
26
50
% V_DD
74
5
% V_DD
-5
µA
5
6.7
8
9.3
µA
165
°C
25
°C
88
90
92
%
92.5
V_REFIN
48
Clock
cycles
0.03 0.1
V
0.01
µA
Current-Limit Startup Blanking
112
Clock
cycles
Autoretry Restart Time
896
Clock
cycles
4 _______________________________________________________________________________________