MP2144 – 2A, 5.5V, 1.2MHz. 40μA IQ, SYNCHRONOUS STEP-DOWN SWITCHER
ELECTRICAL CHARACTERISTICS (5)
VIN = 5V, TA = 25°C, unless otherwise noted.
Parameter
Symbol Condition
Min
-1.5%
-2%
Typ
Max Units
2.5V ≤ VIN ≤ 5.5V
TA=-40oC to +85oC
VFB = 0.63V
0.600 +1.5%
Feedback Voltage
VFB
V/%
+2%
Feedback Current
IFB
10
90
60
nA
mΩ
mΩ
PFET Switch ON Resistance
NFET Switch ON Resistance
RDSON_P
RDSON_N
V
EN = 0V, VIN = 5V
Switch Leakage
0.1
2
μA
VSW = 0V and 5V
PFET Current Limit
3.3
3.8
100
200
277
A
NFET Switch Sinking Current
INSW
tON
VOUT=1.2V, VFB=0.7V
VIN=5V, VOUT=1.2V
μA
ON Time
nS
VIN=3.6V, VOUT=1.2V
VIN=5V, VOUT=1.2V, IOUT=1A
TA=-40oC to +85oC
-20%
-25%
1200 +20% kHz
1200 +25% kHz
Switching frequency
fs
Minimum OFF Time
Soft-Start Time
tMIN-OFF
tSS-ON
50
1.3
1
ns
ms
ms
Soft-Stop Time
tSS-OFF
Power-Good Upper Trip
Threshold
FB voltage with respect to
the regulation
PGH
+10%
%
Power-Good Lower Trip
Threshold
PGL
PGD
VPG-L
VPG-H
RPG
-10%
110
%
μs
V
Power-Good Delay
Power-Good Sink Current
Capability
Sink 1mA
0.4
Power Good Logic High Voltage
VIN=5V, VFB=0.6V
4.9
2.0
V
Power Good Internal Pull-Up
Resistor
500
2.2
kΩ
Under-Voltage Lockout Threshold
Rising
2.4
0.4
V
Under-Voltage Lockout Threshold
Hysteresis
150
mV
EN Input Logic Low Voltage
EN Input Logic High Voltage
V
1.2
V
VEN=2V
VEN=0V
VEN=0V
2
μA
μA
μA
EN Input Current
0.1
0.1
Supply Current (Shutdown)
Supply Current (Quiescent)
VEN=2V, VFB=0.63V,
VIN=3.6V
40
μA
Thermal Shutdown
Thermal Hysteresis
150
30
°C
°C
Notes:
5) Guaranteed by design.
MP2144 Rev. 1.03
12/20/2012
www.MonolithicPower.com
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