MP1470 – SYNCHRONOUS, STEP-DOWN CONVERTER WITH INTERNAL MOSFETS
ELECTRICAL CHARACTERISTICS (5)
VIN = 12V, TA = 25°C, unless otherwise noted.
Parameter
Symbol Condition
Min
Typ
Max
Units
μA
mA
mΩ
mΩ
μA
A
Supply Current (Shutdown)
Supply Current (Quiescent)
HS Switch-On Resistance
LS Switch-On Resistance
Switch Leakage
IIN
Iq
VEN = 0V
1
VEN = 2V, VFB = 1V
0.83
163
86
HSRDS-ON VBST-SW=5V
LSRDS-ON Vcc=5V
SWLKG VEN = 0V, VSW =12V
ILIMIT
1
Current Limit (5)
3
3.7
490
92
Oscillator Frequency
Maximum Duty Cycle
Minimum On Time(5)
Feedback Voltage
fSW
DMAX
VFB=0.75V
400
88
580
kHz
%
VFB=700mV
τON_MIN
VFB
VEN_RISING
VEN_FALLING
90
ns
776
1.4
800
1.5
1.32
824
1.6
mV
V
EN Rising Threshold
EN Falling Threshold
1.23
1.41
V
VEN=2V
VEN=0
1.6
0
μA
μA
EN Input Current
IEN
VIN Under-Voltage Lockout
Threshold—Rising
INUVVth
3.85
4.2
4.55
V
VIN Under-Voltage Lockout
Threshold Hysteresis
INUVHYS
340
mV
Soft-Start Period
τSS
1
ms
°C
°C
Thermal Shutdown(5)
Thermal Hysteresis(5)
150
20
Notes:
5) Guaranteed by design.
MP1470 Rev. 1.02
8/27/2013
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