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PDF MP2493 Data sheet ( Hoja de datos )
| Número de pieza | MP2493 | |
| Descripción | Low EMI Step-Down Converter | |
| Fabricantes | MPS | |
| Logotipo |  |
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The Future of Analog IC Technology
MP2493
2A, 36V, Low EMI Step-Down Converter
with Programmable Output Current Limit
DESCRIPTION
The MP2493 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.
Fault condition protection includes cycle-by-cycle
current limiting and thermal shutdown.
The MP2493 requires a minimum number of
readily available standard external components.
The MP2493 is available in 8-pin SOIC, and 8-
pin SOICE packages.
FEATURES
• Wide 4.5V to 36V 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
• Up to 95% Efficiency
• Fixed 130kHz Frequency with low EMI
• Thermal Shutdown
• Cycle-by-Cycle Over Current Protection
• Available in 8-Pin SOIC and 8-pin SOIC8E
Packages
APPLICATIONS
• USB Power Supplies
• Automotive Cigarette Lighter Adapters
• Power Supply for Linear Chargers
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Quality Assurance. “MPS” and “The
Future of Analog IC Technology” are Registered Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
5V
VIN
6V - 36V
+
GND
U1
1 VIN
R8
0
7
BST
ISN 5
MP2493
ISP 6
SW 8
R4
1k
R9
20k
C10
4.7nF
R6
4.02k
C6
47nF
R3
4.7k
4 SS
GND
2
FB 3
D1
3A/40V
R5
0
R7
200k
+
C7
150pF
Efficiency
VOUT=5V
100
92
VIN=12V
84
VOUT
GND
76
68
60
0 0.4 0.8 1.2 1.6
OUTPUT CURRENT (A)
2
MP2493 Rev. 1.0
2/12/2014
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
1
1 page  
MP2493 – 2A, 36V, LOW EMI STEP-DOWN WITH PROGRAMMABLE OUTPUT CURRENT LIMIT
TYPICAL PERFORMANCE CHARACTERISTICS
C1=68μF, C2=10μF, C3=100μF, C4=22μF, C8=C7=0.1μF, L=33μH, TA=25ºC, unless otherwise
noted.
Efficiency vs. Load Current
VOUT=5V
Efficiency vs. Load Current
VOUT=3.3V
Efficiency vs. Load Current
VOUT=1.8V
100
VIN=8V
92
84
VIN=12V
VIN=18V
76
100
VIN=8V
90
80 VIN=18V
VIN=12V
70 VIN=24V
60
100
90 VIN=8V
80 VIN=12V
70
VIN=24V
VIN=18V
60
68 50
50
60
0 0.4 0.8 1.2 1.6
2
40
0 0.4 0.8 1.2 1.6
2
40
0 0.4 0.8 1.2 1.6
2
OUTPUT CURRENT ( A )
O UTPUT CURRE NT ( A )
O UTPUT CURRE NT ( A )
Load Regulation
VOUT=5V
5. 06
5. 04
5. 02
5. 00
VIN=8V VIN=12V
VIN=18V
4. 98
4. 96
0 0.4 0.8 1.2 1.6
2
O UTPUT CURRE NT ( A )
Load Regulation
VOUT=3.3V
3. 31
3. 30
3. 29
VIN=12V
VIN=8V
3. 28
3. 27
VIN=18V
3. 26
0 0.4 0.8 1.2 1.6
2
O UTPUT CURRE NT ( A )
Load Regulation
VOUT=1.8V
1. 810
1. 805
VIN=8V
1. 800
1. 795
1. 790
VIN=12V
VIN=18V
1. 785
0 0.4 0.8 1.2 1.6
OUTPUT CURRENT (A)
2
Maximum IOUT vs. Duty Cycle
VOUT=5V
3. 6
3. 4
3. 2
3. 0
2. 8
2. 6
30
39 48 57 66
DUTY CYCLE ( % )
75
Loop Gain with Phase Margin
60
40
20
0
-20
-40
-60
100
180
120
60
0
-60
-120
1000
10000
-180
100000
FRE QUE NCY ( HZ )
Current regulation
VIN=12V
5. 4
4. 4
3. 4
2. 4
1. 4
0. 4
0.0 0.5 1.0 1.5 2.0
LOAD CURRE NT ( A )
2. 5
MP2493 Rev. 1.0
2/12/2014
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
5
5 Page 
MP2493 – 2A, 36V, LOW EMI STEP-DOWN WITH PROGRAMMABLE OUTPUT CURRENT LIMIT
PACKAGE INFORMATION
0.189(4.80)
0.197(5.00)
85
SOIC8
0.024(0.61)
0.063(1.60)
0.050(1.27)
PIN 1 ID
0.150(3.80)
0.157(4.00)
0.228(5.80)
0.244(6.20)
0.213(5.40)
14
TOP VIEW
RECOMMENDED LAND PATTERN
0.013(0.33)
0.020(0.51)
0.053(1.35)
0.069(1.75)
SEATING PLANE
0.004(0.10)
0.010(0.25)
0.050(1.27)
BSC
FRONT VIEW
SEE DETAIL "A"
SIDE VIEW
0.0075(0.19)
0.0098(0.25)
GAUGE PLANE
0.010(0.25) BSC
0.010(0.25)
0.020(0.50)
x
45o
0o-8o
0.016(0.41)
0.050(1.27)
DETAIL "A"
NOTE:
1) CONTROL DIMENSION IS IN INCHES. DIMENSION IN
BRACKET IS IN MILLIMETERS.
2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH,
PROTRUSIONS OR GATE BURRS.
3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH
OR PROTRUSIONS.
4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING)
SHALL BE 0.004" INCHES MAX.
5) DRAWING CONFORMS TO JEDEC MS-012, VARIATION AA.
6) DRAWING IS NOT TO SCALE.
MP2493 Rev. 1.0
2/12/2014
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MP2493.PDF ] | |
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