MP1498 – 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
0.8
100
40
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
3.4
A
Oscillator Frequency
Fold-back Frequency
Maximum Duty Cycle (6)
Minimum ON Time (6)
Sync Frequency Range
1100
1400
0.15
89
1700
kHz
fSW
fFB
VFB= 0V
DMAX
VFB=700mV
%
40
ns
τON_MIN
fSYNC
0.3
784
780
3
MHz
TA=25°C
-40°C<TA<85°C(7)
800
800
10
816
820
50
Feedback Voltage
VFB
mV
Feedback Current
IFB
VFB=820mV
nA
V
EN Rising Threshold
EN Falling Threshold
VEN RISING
VEN FALLING
1.2
1.1
1.4
1.6
1.4
1.25
V
VEN=2V
VEN=0
2
μA
EN Input Current
IEN
0
5
μA
μs
EN Turn Off Delay
ENTd-off
INUVVth
VIN Under-Voltage Lockout
Threshold-Rising
3.7
10
3.9
4.1
18
V
VIN Under-Voltage Lockout
Threshold-Hysteresis
INUVHYS
VCC
650
mV
VCC Regulator
5
3
V
VCC Load Regulation
Soft-Start Current
Thermal Shutdown(6)
Thermal Hysteresis(6)
ICC=5mA
%
ISS
14
150
20
μA
°C
°C
Notes:
6) Guaranteed by design.
7) Not tested in production and guaranteed by over-temperature correlation.
MP1498 Rev. 1.01
12/18/2012
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