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PDF MP2492 Data sheet ( Hoja de datos )
| Número de pieza | MP2492 | |
| Descripción | 100kHz Step-Down Converter | |
| Fabricantes | MPS | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MP2492 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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The Future of Analog IC Technology
MP2492
2A, 55V, 100kHz Step-Down Converter
with Programmable Output Current Limit
DESCRIPTION
The MP2492 is a monolithic step-down switch
mode converter with a programmable output
current limit. It achieves 2A continuous output
current over a wide input supply range with
excellent load and line regulation.
The maximum output current can be
programmed by sensing current through the
inductor DC resistance (DCR) or an accurate
sense resistor.
MP2492 achieves low EMI signature with well
controlled switching edges.
Fault condition protection includes cycle-by-cycle
current limiting, and thermal shutdown.
The MP2492 requires a minimum number of
readily available standard external components.
The MP2492 is available in QFN10 (3mm x 3mm)
and SOIC8E packages.
FEATURES
• Wide 4.5V to 55V Operating Input Range
• Programmable up to 2A Output Current
• Output Adjustable from 0.8V to 15V
• Programmable Output Current Limit without
power loss
• 0.25Ω Internal Power MOSFET Switch
• Stable with Low ESR Output Ceramic
Capacitors
• Fixed 100kHz Frequency
• Low EMI signature
• Thermal Shutdown
• Cycle-by-Cycle Over Current Protection
• Available in QFN10 and SOIC8E Packages
APPLICATIONS
• USB Power Supplies
• Automotive Cigarette Lighter Adapters
• Power Supply for Linear Chargers
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
Efficiency
100 VIN =12V , VOUT =5V
90
80
70
60
50
40
30
20
0.0 0.4 0.8 1.2 1.6 2.0
IOUT (A)
MP2492 Rev. 1.0
12/20/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
1
1 page  
MP2492 – 2A, 55V, 100kHz WITH PROGRAMMABLE OUTPUT CURRENT LIMIT
TYPICAL PERFORMANCE CHARACTERISTICS
C1=220uF, C2=2.2uF, C3=39uF, C4=22uF, L=39uH, TA=25ºC，unless otherwise noted.
Efficiency vs. Load Current
Efficiency vs. Load Current Efficiency vs. Load Current
VOUT =5V
VOUT =3.3V
VOUT =2.5V
100
90
VIN=8V
100
90
VIN=8V
100
90 VIN=4.5V
80
70 VIN=12V
60
80 VIN=12V
70
60
80 VIN=12V
70
60
50 VIN=50V
40
30
50
VIN=50V
40
30
50
40
30 VIN=50V
20
0.0 0.4 0.8 1.2 1.6 2.0
20
0.0 0.4 0.8 1.2 1.6 2.0
20
0.0 0.4 0.8 1.2 1.6 2.0
IOUT (A)
IOUT (A)
IOUT (A)
Load Regulation
VOUT =5V
5. 004
5. 000
4. 996
VIN=8V
VIN=12V
4. 992
4. 988
VIN=50V
4. 984
Load Regulation
VOUT =3.3V
3. 310
3. 306
3. 302
VIN=8V VIN=12V
3. 298
3. 294
VIN=50V
Load Regulation
2.510 VOUT =2.5V
2. 508
VIN=12V
2. 506
2. 504
VIN=50V
2. 502
4. 980
3. 290
2. 500
0.0 0.4 0.8 1.2 1.6 2.0
0.0 0.4 0.8 1.2 1.6 2.0
0.0 0.4 0.8 1.2 1.6 2.0
IOUT (A)
IOUT (A)
IOUT (A)
Maximum IOUT vs.
Duty Cycle
6. 0
5. 2
4. 4
3. 6
2. 8
2. 0
0
20 40 60 80
DUTY CYCLE ( % )
100
Loop Gain with Phase Margin Current regulation
50 VIN=12V, VOUT=5V, IOUT=1.8A
Sense to DCR
200 6
40 160
30
Phase
120 5
20 80 4
10 40
0
-10 Gain
-20
-30
-40
0
-40
-80
-120
-160
3
2
1
-50
0. 1
-200 0
1 10 100 1000
0 0.5 1 1.5 2
FRE QUE NCY (kHz)
LOAD CURRENT ( A )
2.5
MP2492 Rev. 1.0
12/20/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
5
5 Page 
MP2492 – 2A, 55V, 100kHz WITH PROGRAMMABLE OUTPUT CURRENT LIMIT
PIN 1 ID
MARKING
PIN 1 ID
INDEX AREA
2.90
3.10
TOP VIEW
0.20 REF
SIDE VIEW
QFN10 (3mm x 3mm)
0.30
0.50
0.18
0.30
10
2.90
3.10 0.50
BSC
6
1.45
1.75
PIN 1 ID
SEE DETAIL A
1
2.25
2.55
5
BOTTOM VIEW
0.80
1.00
0.00
0.05
PIN 1 ID OPTION A
R0.20 TYP.
PIN 1 ID OPTION B
R0.20 TYP.
DETAIL A
0.70
0.25
0.50
2.90
1.70
NOTE:
1) ALL DIMENSIONS ARE IN MILLIMETERS.
2) EXPOSED PADDLE SIZE DOES NOT INCLUDE MOLD FLASH.
3) LEAD COPLANARITY SHALL BE 0.10 MILLIMETER MAX.
4) DRAWING CONFORMS TO JEDEC MO-229, VARIATION VEED-5.
5) DRAWING IS NOT TO SCALE.
2.50
RECOMMENDED LAND PATTERN
NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications.
Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS
products into any application. MPS will not assume any legal responsibility for any said applications.
MP2492 Rev. 1.0
12/20/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet MP2492.PDF ] | |
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