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MPQ2490 Datasheet(PDF) 3 Page - Monolithic Power Systems

No. de pieza MPQ2490
Descripción Electrónicos  Industrial Grade, 1.5A, 36V, 700kHz Step-Down Converter with Programmable Output Current Limit
PDF  11 Pages
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Fabricante Electrónico  MPS [Monolithic Power Systems]
Página de inicio  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MPQ2490 Datasheet(HTML) 3 Page - Monolithic Power Systems

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MPQ2490
–INDUSTRIALGRADE,1.5A,36V,700kHzSTEP-DOWNWITHPROGRAMMABLEOUTPUTCURRENTLIMIT
MPQ2490 Rev. 1.02
www.MonolithicPower.com
3
7/26/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
VIN = 12V, TA = -40°C to +85°C. Typical values are at TA=25°C, unless otherwise noted.
Parameters
Symbol
Condition
Min
Typ
Max
Units
Feedback Voltage
VFB
4.5V
 V
IN  36V
TA=25C
0.785
0.805
0.825
V
-40
CT
A85°C
0.777
0.833
Feedback Bias Current
IBIAS(FB)
VFB = 0.8V
0.01
1
μA
Switch On Resistance
RDS(ON)
0.25
Ω
Switch Leakage
VEN = 0V, VSW = 0V
0.1
10
μA
Current Limit
(5)
Duty Cycle <= 80%
1.7
4.2
A
Oscillator Frequency
fSW
VFB = 0.6V
500
700
950
kHz
Fold-Back Frequency
VFB = 0V
200
kHz
Boot-Strap Voltage
VBST - VSW
5
V
Minimum On Time
(5)
tON
VFB = 1V
100
ns
Under Voltage Lockout
Threshold Rising
2.9
3.3
3.7
V
Under Voltage Lockout
Threshold Hysteresis
200
mV
Supply Current (Shutdown)
VEN = 0V
4
25
μA
Supply Current (Quiescent)
VEN = 2V, VFB = 1V
500
800
μA
Thermal Shutdown (5)
150
°C
Current Sense Voltage
VISP –VISN VISP, VISN
0.4
–15V
80
100
120
mV
Input Bias Current (ISN, ISP) IBIAS (ISN,ISP) VISP, VISN
0.4
–15V
–1.5
0.1
+1.5
μA
Note:
5) Derived from design and bench characterization. Not tested in production.



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