MAX15035 Datasheet, PDF (3/27 Pages) Maxim Integrated Products – 15A Step-Down Regulator with Internal Switches

15A Step-Down Regulator with Internal Switches
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V_IN = 12V, V_DD = V_CC = V_EN = 5V, REFIN = ILIM = REF, SKIP = GND. T_A = 0°C to +85°C, unless otherwise spec-
ified. Typical values are at T_A = +25°C.) (Note 1)
PARAMETER
Soft-Start/Soft-Stop Slew Rate
Dynamic REFIN Slew Rate
REFERENCE
Reference Voltage
FAULT DETECTION
Output Overvoltage-Protection
Trip Threshold
Output Overvoltage
Fault-Propagation Delay
Output Undervoltage-Protection
Trip Threshold
Output Undervoltage
Fault-Propagation Delay
PGOOD Propagation Delay
PGOOD Output-Low Voltage
PGOOD Leakage Current
Dynamic REFIN Transition Fault
Blanking Threshold
Thermal-Shutdown Threshold
CURRENT LIMIT
ILIM Input Range
ILIM Input Bias Current
Current-Limit Threshold
Current-Limit Threshold
(Negative)
Current-Limit Threshold
(Zero Crossing)
Ultrasonic Frequency
SYMBOL
SS_SR
DYN_SR
CONDITIONS
Rising/falling edge on EN
Rising edge on REFIN
V_REF
V_CC = 4.5V
to 5.5V
No load
I_REF = -10µA to +50µA
OVP
With respect to the internal target voltage
(error comparator threshold); rising edge;
hysteresis = 50mV
Dynamic transition
Minimum OVP threshold
t_OVP
UVP
FB forced 25mV above trip threshold
With respect to the internal target voltage
(error comparator threshold) falling edge;
hysteresis = 50mV
t_UVP
t_PGOOD
I_PGOOD
T_SHDN
FB forced 25mV below trip threshold
UVP falling edge, 25mV overdrive
OVP rising edge, 25mV overdrive
Startup delay
I_SINK = 3mA
FB = REFIN (PGOOD high impedance),
PGOOD forced to 5V, T_A = +25°C
Fault blanking initiated; REFIN deviation
from the internal target voltage (error
comparator threshold); hysteresis = 10mV
Temperature rising, hysteresis = 15°C
V_ILIMIT
V_INEG
V_ZX
T_A = +25°C, ILIM = 0.4V to 2V
V_ILIM = 0.4V, V_GND - V_LX
ILIM = REF (2.0V), V_GND - V_LX
V_ILIM = 0.4V, V_GND - V_LX
V_ILIM = 0.4V,
V_GND - V_LX, SKIP = GND or open
SKIP = open (3.3V); V_FB = V_REFIN + 50mV
MIN TYP MAX UNITS
0.4
1.2
2.2 mV/µs
3
9.45
18
mV/µs
1.990 2.00 2.010
V
1.98
2.02
250 300 350
mV
V_REF +
0.30
V
0.7
5
µs
-240 -200 -160
mV
100 200 350
µs
5
5
µs
100 200 350
0.4
V
1
µA
±50
mV
160
°C
0.4
V_REF
V
-0.1
+0.1
µA
18
20
22
mV
92
100 108
-24
mV
1
mV
18
30
kHz
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