MP1493 – 3A, 4.2V-16V INPUT, FAST TRANSIENT SYNCHRONOUS STEP-DOWN CONVERTER
ELECTRICAL CHARACTERISTICS
V
IN
= 12V, T
A
= +25°C, unless otherwise noted.
Parameters
Supply Current (Shutdown)
Supply Current (Quiescent, Not
Switching)
HS Switch On Resistance
LS Switch On Resistance
Switch Leakage
Current Limit
(5)
One-Shot On Time
Minimum Off Time
Fold-back Off Time
OCP hold-off time
Feedback Voltage
Feedback Current
Soft Start Time
EN Rising Threshold
EN Threshold Hysteresis
EN Input Current
VIN Under Voltage
Threshold Rising
VIN Under Voltage
Threshold Hysteresis
Lockout
Lockout
Symbol
I
IN
I
IN
HS
RDS-ON
LS
RDS-ON
SW
LKG
I
LIMIT
T
ON
T
OFF
T
FB
T
OC
V
FB
I
FB
T
SS
VILEN
VIHEN
I
EN
INUVVth
INUVHYS
300
150
25
V
EN
=0V, V
SW
=0V or
12V
After Soft-Start
Time-out
R
7
=300kΩ,V
OUT
=1.2V
I
LIM
=1
I
LIM
=1
789
V
FB
=800mV
1.05
V
EN
=2V
V
EN
=0V
Condition
V
EN
=0V
V
EN
=2V, V
FB
=0.9V
Min
Typ
5
1
120
60
0
4.0
5.0
250
130
1.25
50
805
10
1
1.35
500
2
0
150
10
Max
Units
μA
mA
mΩ
mΩ
μA
A
ns
ns
μs
μs
mV
nA
ms
V
mV
μA
3.1
V
mV
°C
°C
821
50
1.6
Thermal Shutdown
Thermal Shutdown Hysteresis
Note:
5) Guaranteed by design and characterization..
MP1493 Rev. 1.15
12/9/2013
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