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MP28266 Datasheet(PDF) 3 Page - Monolithic Power Systems

Part # MP28266
Description  21V, 3A, 500kHz, Synchronous Step-Down Converter
PDF  14 Pages
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Manufacturer  MPS [Monolithic Power Systems]
Direct Link  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP28266 Datasheet(HTML) 3 Page - Monolithic Power Systems

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MP28266 – 21V, 3A, 500kHz, SYNCHRONOUS, STEP-DOWN CONVERTER
MP28266 Rev. 1.0
www.MonolithicPower.com
3
3/16/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
VIN = 12V, TA = 25°C, unless otherwise noted.
Parameters
Symbol
Condition
Min
Typ
Max
Units
Supply Current (Quiescent)
Iq
VIN = 12V, VFB = 1V,
VAAM=5V
0.55
0.7
0.85
mA
VIN = 12V, VFB = 1V,
VAAM=0.5V
0.45
0.6
0.75
HS Switch On Resistance
HSRDS-ON
120
mΩ
LS Switch On Resistance
LSRDS-ON
20
mΩ
Switch Leakage
SWLKG
VSW = 0V or 12V,
VFB =0.7V, VAAM=0.5V
0.1
1
μA
Current Limit
(5)
ILIMIT
D=40%
4.2
5.5
A
Oscillator Frequency
fSW
VFB=550mV
425
500
595
kHz
Minimum On Time
(5)
tON-MIN
80
ns
Maximum Duty Cycle
DMAX
VFB = 550mV
85
90
%
Sync Frequency Range
fSYNC
0.3
2
MHz
Feedback Voltage
VFB
TA = 25
oC
591
603
615
mV
-40
oC<T
A<85
oC(6)
588
603
618
Feedback Current
IFB
VFB = 650mV
10
50
nA
AAM-High Threshold
VAAM HIGH
2.9
V
AAM-Low Threshold
VAAM LOW
2.2
V
AAM Input Current
IAAM
VAAM=0V
0
μA
VAAM=5V
3.3
μA
SYNC Input HIGH Level
VHI
1.8
V
SYNC Input LOW Level
VLO
0.4
V
SYNC Input Current
ISYNC
VSYNC=6V
6
μA
Soft-Start current
ISS
VSS=0
10
μA
VIN Under-Voltage Lockout
Threshold—Rising
INUVVth_rising
5.2
5.5
5.8
V
VIN Under-Voltage Lockout
Threshold—Falling
INUVVth_falling
4.1
4.4
4.7
V
VCC Regulator
VCC
5
V
VCC Load Regulation
Icc=5mA
5
%
Thermal Shutdown
(5)
TSD
150
°C
Notes:
5) Guaranteed by design.
6) Not tested in production and guaranteed by over-temperature correlation.



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