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PDF MP4459 Data sheet ( Hoja de datos )
| Número de pieza | MP4459 | |
| Descripción | Step-Down Converter | |
| Fabricantes | MPS | |
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MP4459
Step-Down
The Future of Analog IC Technology
DESCRIPTION
The MP4459 is a high frequency step-down
switching re gulator with an integrated internal
high-side h igh voltage power MOSFET. It
provides 1.5A output with current mode control
for fast loop response and easy compensation.
The wide 3.8V t
o 36V i nput range
accommodates a variety of step-down
applications, including those in automotive
systems. A 120µA operational quiescent current
is su itable for use in batte ry-powered
applications.
The frequen cy foldback helps prevent inductor
current run away during startup and thermal
shutdown provides reliable, fa ult tolerant
operation.
In some ap plications, such as AM radio a nd
ADSL applications, in which the device is
sensitive to frequency band, the MP4459 ca n
avoid the r elated EMI problem by setting the
frequency at 4MHz.
The MP4459 is availablein thin 10-pin 3mm x 3mm
TQFN package.
1.5A, 4MHz, 36V
Converter
FEATURES
• 120 μA Quiescent Current
• Wide 3.8V to 36V Operating Input Range
• 150m Ω Internal Power MOSFET
• Up to 4MHz Programmable Switching
Frequency
• Ceramic Capacitor Stable
• Internal Soft-Start
• Precision C urrent Limit without a Current
Sensing Resistor
• Up to 95% Efficiency
• Output Adjustable from 0.8V to 30V
• Available in 10-Pin 3x3mm TQFN Package
APPLICATIONS
• High Voltage Power Conversion
• Automotive Systems
• Industrial Power Systems
• Distributed Power Systems
• Battery Powered Systems
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Products, Quality Assurance page.
“MPS” and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
Efficiency vs
Load Current
100
90
VI=5V
80 VI=24V
70 VI=12V
60
50
40
30 VO=3.3V
20
0
500
1000
1500
LOAD CURRENT (mA)
MP4459 Rev. 1.02
www.MonolithicPower.com
12/24/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
1
http://www.Datasheet4U.com
1 page  
MP4459 – 1.5A, 4MHz, 36V STEP-DOWN CONVERTER
TYPICAL PERFORMANCE CURVES
VIN = 12V, VOUT = 5V, fS = 500KHz, TA = +25°C, unless otherwise noted.
MP4459 Rev. 1.02
www.MonolithicPower.com
12/24/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
5
5 Page 
MP4459 – 1.5A, 4MHz, 36V STEP-DOWN CONVERTER
Table 2—Selected Inductors
Manufacturer Part
Wurth Electronics
Wurth Electronics
Wurth Electronics
Wurth Electronics
Wurth Electronics
Wurth Electronics
TDK RLF7
TDK RLF7
TDK RLF7
TDK SLF101
TDK SLF125
Number
Inductance Max DCR Current Rating
(µH)
(Ω)
(A)
7447789002
2.2µH 0.019
4A
7447789003
3.3µH 0.024
3.42A
7447789004
4.7µH 0.033
2.9A
744066100
10µH 0.035
3.6A
744771115 15µH
0.025
3.75
744771122 22µH
0.031
3.37
030T-2R2
2.2µH
0.012 5.4A
030T-3R3
3.3µH
0.02 4.1A
030T-4R7
4.7µH
0.031 3.4A
45T-100
10µH
0.0364
3A
65T-150M4R2 15µH
0.0237
4.2
TDK SLF125
65T-220M3R5 22µH
0.0316
3.5
TOKO FDV06
TOKO FDV06
TOKO FDV06
TOKO #919AS-100
TOKO #919AS-160
TOKO #919AS-220
30-2R2M
30-3R3M
30-4R7M
M
M
M
2.2µH 0.021
3.3µH 0.031
4.7µH 0.049
10µH
0.0265
16µH
0.0492
22µH
0.0776
5.3
4.3
3.3
4.3
3.3
3.0
Dimensions
L x W x H (mm3)
7.3x7.3x3.2
7.3x7.3x3.2
7.3x7.3x3.2
10x10x3.8
12x12x6
12x12x6
7.3x6.8x3.2
7.3x6.8x3.2
7.3x6.8x3.2
10.1x10.1x4.5
12.5x12.5x6.5
12.5x12.5x6.5
7.7x7x3
7.7x7x3
7.7x7x3
10.3x10.3x4.5
10.3x10.3x4.5
10.3x10.3x4.5
MP4459 Rev. 1.02
www.MonolithicPower.com
12/24/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet MP4459.PDF ] | |
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