MP1470B – SYNCHRONOUS, STEP-DOWN CONVERTER WITH INTERNAL MOSFETS
ELECTRICAL CHARACTERISTICS
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
1
Current limit
ILIMIT
fSW
VIN = 12V, D = 40%
VFB = 0.75V
3
3.7
490
92
Oscillator frequency
Maximum duty cycle
Minimum on time(6)
Feedback voltage
400
88
580
kHz
%
DMAX
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
V
EN = 2V
1.6
0
µA
µA
EN input current
IEN
VEN = 0
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
Thermal shutdown(6)
Thermal hysteresis(6)
NOTE:
τSS
TSD
VOUT from 0% to 100%
1
ms
°C
°C
150
20
TSD HYS
6) Not tested in production. Guaranteed by engineering sample characterization.
MP1470B Rev. 1.0
8/25/2015
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