MP2158 – 1A, 6V, 1.5MHz SYNCHRONOUS STEP-DOWN SWITCHER
ELECTRICAL CHARACTERISTICS (5)
VIN = 5V, TA = +25C, unless otherwise noted.
Parameter
Symbol Condition
Min
-3%
Typ
Max
+3%
+3.5%
50
Units
2.5V ≤ VIN ≤ 6V
TA=-40oC to +85oC (6)
VFB = 0.6V
0.600
Feedback Voltage
VFB
V/%
-3.5%
Feedback Current
IFB
10
118
88
nA
mΩ
mΩ
PFET Switch On Resistance
NFET Switch On Resistance
RDSON P
RDSON N
V
EN = 0V, VIN = 6V
Switch Leakage
0
1
μA
VSW = 0V and 6V
PFET Current Limit
2
A
VIN=5V, VOUT=1.2V
VIN=3.6V, VOUT=1.2V
VOUT=1.2V
185
245
ON Time
TON
Fs
ns
-20%
-25%
1500 +20% kHz/%
1500 +25% kHz/%
Switching frequency
TA=-40oC to +85oC(6)
Minimum Off Time
Soft-Start Time
TMIN-OFF
TSS-ON
60
ns
1.5
ms
FB voltage respect to the
regulation
Power Good Upper Trip Threshold
PGH
+10
%
Power Good Lower Trip Threshold
Power Good Delay
PGL
PGD
-10
50
%
μs
Power Good Sink Current
Capability
VPG-L
VPG-H
RPG
Sink 1mA
0.4
V
V
Power Good Logic High Voltage
VIN=5V, VFB=0.6V
4.9
Power Good Internal Pull Up
Resistor
550
2.3
kΩ
Under Voltage Lockout Threshold
Rising
2.15
2.45
0.4
V
Under Voltage Lockout Threshold
Hysteresis
260
mV
EN Input Logic Low Voltage
EN Input Logic High Voltage
V
1.2
V
VEN=2V
1.5
0
μA
μA
μA
μA
C
C
EN Input Current
VEN=0V
Supply Current (Shutdown)
Supply Current (Quiescent)
Thermal Shutdown(5)
VEN=0V
0
1
VEN=2V, VFB=0.63V, VIN=5V
17
150
30
20
Thermal Hysteresis(5)
Notes:
5) Guaranteed by design.
6) Guaranteed by characterization test.
MP2158 Rev. 1.0
10/10/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
3
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