MAX8646 데이터 시트보기 (PDF) - Maxim Integrated
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MAX8646 Datasheet PDF : 16 Pages
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6A, 2MHz Step-Down Regulator
with Integrated Switches
ELECTRICAL CHARACTERISTICS (continued)
(VIN = VDD = 3.3V, VFB = 0.5V, TA = -40°C to +85°C, typical values are at TA = +25°C, circuit of Figure 1, unless otherwise noted.)
(Note 2)
PARAMETER
Frequency Range
LX Minimum Off-Time
LX Maximum Duty Cycle
LX Minimum On-Time
RMS LX Output Current
ENABLE
EN Input Logic Low, Falling
EN Input Logic High, Rising
EN Hysteresis
EN, Input Current
SS
SS Charging Current
SS Discharge Resistance
THERMAL SHUTDOWN
Thermal-Shutdown Threshold
Thermal-Shutdown Hysteresis
POWER-GOOD (PWRGD)
CONDITIONS
VIN = 2.5V to 3.3V
RFREQ = 50kΩ, VIN = 2.5V to 3.3V
RFREQ = 50kΩ, VIN = 2.5V to 3.3V
VEN = 0V or 3.6V,
VDD = 3.6V
VSS = 0.45V
TA = +25°C
TA = +85°C
MIN TYP MAX UNITS
500
2000 kHz
40
75
ns
93
96
%
80
ns
6
A
1.2
0.7
V
1.7
1.4
V
200
mV
1
µA
0.01
7
8
9
µA
500
Ω
+165
°C
20
°C
Power-Good Threshold Voltage VFB falling, 3mV hysteresis
87
90
93
%
Power-Good Falling Edge
Deglitch
PWRGD Output Voltage Low
PWRGD Leakage Current
OVERCURRENT LIMIT
Current-Limit Startup Blanking
Restart Time
IPWRGD = 4mA
VDD = VPWRGD = 3.6V, VFB = 0.9V
48
Clock
cycles
0.03 0.15
V
0.01
µA
128
1024
Clock
cycles
Clock
cycles
Note 2: Specifications are 100% production tested at TA = +25°C. Limits over the operating temperature range are guaranteed by
design and characterization.
Note 3: Guaranteed by design.
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