MP1497S – SYNCHRONOUS, STEP-DOWN CONVERTER WITH INTERNAL MOSFETS
ELECTRICAL CHARACTERISTICS
VIN = 12V, TA = 25°C, unless otherwise noted.
Parameter
Symbol Condition
Min
Typ
Max
1
Units
μA
Supply Current (Shutdown)
Supply Current (Quiescent)
HS-Switch ON Resistance
LS-Switch ON Resistance
Switch Leakage
IIN
Iq
VEN = 0V
VEN = 2V, VFB = 1V
0.7
120
50
1
mA
mΩ
mΩ
μA
HSRDS-ON VBST-SW=5V
LSRDS-ON VCC=5V
SWLKG VEN = 0V, VSW =12V
1
Current Limit (6)
ILIMIT
fSW
Under 40% Duty Cycle
VFB=750mV
4.2
5
A
Oscillator Frequency
Fold-back Frequency
Maximum Duty Cycle
Minimum ON Time (7)
Sync Frequency Range
410
500
0.5
95
600
kHz
fSW
fFB
VFB<400mV
DMAX
τON_MIN
fSYNC
VFB=700mV
90
%
60
ns
0.3
791
787
2
MHz
TA=25°C
-40°C<TA<85°C(8)
807
807
10
823
827
50
Feedback Voltage
VFB
mV
Feedback Current
IFB
VFB=820mV
nA
V
EN Rising Threshold
EN Falling Threshold
VEN_RISING
VEN_FALLING
1.1
1
1.4
1.75
1.55
1.25
V
VEN=2V
VEN=0
2
μA
EN Input Current
IEN
0
8
μA
μs
EN Turn Off Delay
ENTd-off
INUVVth
VIN Under-Voltage Lockout
Threshold-Rising
3.6
3.9
4.2
17
V
VIN Under-Voltage Lockout
Threshold-Hysteresis
INUVHYS
VCC
650
mV
VCC Regulator
5
3
V
VCC Load Regulation
Soft-Start Current
Thermal Shutdown(7)
Thermal Hysteresis(7)
ICC=5mA
%
ISS
5
11
150
20
μA
°C
°C
Notes:
6) Guaranteed by characterization.
7) Guaranteed by design.
8) Not tested in production and guaranteed by over-temperature correlation.
MP1497S Rev. 1.01
9/7/2015
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