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MP8642 数据表(PDF) 3 Page - Monolithic Power Systems

部件名 MP8642
功能描述  Dual 3A, 23V, 600kHz Step-Down Converter with Frequency Synchronization
PDF  12 Pages
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制造商  MPS [Monolithic Power Systems]
网页  http://www.monolithicpower.com
标志 MPS - Monolithic Power Systems

MP8642 数据表(HTML) 3 Page - Monolithic Power Systems

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MP8642 — DUAL 3A, 23V, 600kHz STEP-DOWN CONVERTER
MP8642 Rev. 1.0
www.MonolithicPower.com
3
9/13/2012
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
Feedback Voltage
VFB
4.5V
 VIN  23V
0.788
0.808
0.828
V
Feedback Current
IFB
VFB = 0.8V
10
nA
Switch On Resistance
(5)
RDS(ON)
80
mΩ
Switch Leakage
VEN = 0V, VSW = 0V
0.1
10
μA
Current Limit
(5)
4
A
Oscillator Frequency
fSW
VFB = 0.6V
400
600
800
kHz
Fold-back Frequency
VFB = 0V
60
150
240
kHz
Maximum Duty Cycle
VFB = 0.6V
85
90
%
Minimum On Time
(4)
tON
100
ns
Under Voltage Lockout Threshold Rising
3.9
4.1
4.3
V
Under Voltage Lockout Threshold Hysteresis
880
mV
EN Input Low Voltage
0.4
V
En Input High Voltage
1.5
V
VEN = 2V
2
EN Input Current
VEN = 0V
0.1
μA
Supply Current (Shutdown)
VEN = 0V
0.1
10
μA
Supply Current (Quiescent)
VEN = 2V, VFB = 1V
0.9
1.1
mA
Thermal Shutdown
150
°C
BG Driver Bias Supply Voltage
VCC
4.5
5
V
Gate Driver Sink Impedance
(5)
RSINK
1
2
Ω
Gate Driver Source Impedance
(5)
RSOURCE
4
5.5
Ω
Gate Drive Current Sense Trip Threshold
20
mV
Power Good Threshold
0.69
0.74
0.79
V
Power Good Threshold Hysteresis
40
mV
PG Pin Level
VPG
PG Sink 4mA
0.4
V
Note:
5) Guaranteed by design.



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