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PDF MP2562 Data sheet ( Hoja de datos )
| Número de pieza | MP2562 | |
| Descripción | Step-Down Converter | |
| Fabricantes | MPS | |
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MP2562
Step-Down
The Future of Analog IC Technology
1A, 4MHz, 50V
Converter
DESCRIPTION
The MP256 2 is a h igh f requency step -down
switching r egulator with a n integrated internal
high-side h igh vo ltage power M OSFET. I t
provides 1A output with current mode control for
fast loop response and easy compensation.
The wide 4.5V to 50V input range accommodates
a var iety of st ep-down ap plications, including
those in an automotive input environment. A 12µA
shutdown mo de q uiescent current allows us e in
battery-powered applications.
High pow er co nversion ef ficiency over a wid e
load range is ac hieved b y sc aling do wn th e
switching f requency at li ght lo ad co ndition to
reduce the switching and gate driving losses.
The fr equency f oldback he lps prevent indu ctor
current run away during sta rtup and thermal
shutdown provides r eliable, fa ult tolerant
operation.
By switching a t 4MH z, th e MP25 62 is ab le to
prevent EMI (Electromagnetic Interference) noise
problems, such a s t hose found in A M radio a nd
ADSL applications.
The MP2562 is availa ble in small 3mm x 3mm
QFN10 and SOIC8 packages.
FEATURES
• 120 μA Quiescent Current(12uA Shutdown)
• Wide 4.5V to 50V Operating Input Range
• 460m Ω Internal Power MOSFET
• Up to 4MHz Programmable Switching
Frequency
• Stable with Ceramic Capacitor
• Internal Soft-Start
• Internally Set Current Limit without external
Current Sensing Resistor
• Up to 95% Efficiency
• Output Adjustable from 0.8V to 47V
• Available in 3x3 QFN10 and SOIC8
Packages
APPLICATIONS
• High Voltage Power Conversion
• Automotive Systems
• Industrial Power Systems
• Distributed Power Systems
• Battery Powered Systems
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
C4
100nF
10 L1
VIN
8,9 VIN
BST
SW 1,2
C1
R5
D1
100V
C2
6.3V
EN
R6
3 EN MP2562 FB 5
R2 R1
7 FREQ
R4
COMP 4
GND
6
C3
220pF
R3
C6
NS
VOUT
3.3V
90 VIN=8V
80
70 VIN=24V
60 VIN=50V
50 VIN=12V VIN=36V
40
10
100 1000
OUTPUT CURRENT (mA)
MP2562 Rev. 0.91
4/5/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
1
http://www.Datasheet4U.com
1 page  
MP2562 – 1A, 4MHz, 50V STEP-DOWN CONVERTER
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 12V, VOUT=5V, C1 = 10µF, C2 = 22µF, L1 = 10µH and TA = +25°C, unless otherwise noted.
Efficiency @VOUT=2.5V
100 VIN=5V
90
Efficiency @VOUT=5V
100 VIN=8V
90
Oscillating Frequency
vs Rfreq
4000
3500
3000
80
80
VIN=12V
2500
70 70 2000
60
50
40
10
VIN=24V
VIN=12V
fs=500kHz
100 1000
OUTPUT CURRENT (mA)
60
50
40
10
VIN=24V
fs=500kHz
100 1000
OUTPUT CURRENT (mA)
1500
1000
500
0
10
100
Rfreq ( )
1000
Steady State
IOUT = 0.1A
Steady State
IOUT = 1A
VOUT
AC Coupled
10mV/div.
VOUT
AC Coupled
20mV/div.
VSW
10V/div.
IL
1A/div.
1
VSW
10V/div.
IL
1A/div.
2
MP2562 Rev. 0.91
4/5/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
5
5 Page 
MP2562 – 1A, 4MHz, 50V STEP-DOWN CONVERTER
Table 1—Inductor Selection Guide
Part Number
Inductance (µH)
Wurth Electronics
7447789002 2.2
7447789003 3.3
7447789004 4.7
744066100 10
744771115 15
744771122 22
TDK
RLF7030T-2R2 2.2
RLF7030T-3R3 3.3
RLF7030T-4R7 4.7
SLF10145T-100 10
SLF12565T-150M4R2 15
SLF12565T-220M3R5 22
Toko
FDV0630-2R2M 2.2
FDV0630-3R3M 3.3
FDV0630-4R7M 4.7
919AS-100M 10
919AS-160M 16
919AS-220M 22
Max DCR (Ω)
0.019
0.024
0.033
0.035
0.025
0.031
0.012 5.4
0.02 4.1
0.031 3.4
0.0364
0.0237
0.0316
0.021 5.3
0.031 4.3
0.049 3.3
0.0265
0.0492
0.0776
Current Rating (A)
4
3.42
2.9
3.6
3.75
3.37
3
4.2
3.5
4.3
3.3
3
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
Output Rectifier Diode
The output rectifier diode supplies the current to
the inductor when the high-side swit ch is off. To
reduce losses due to th e diode for ward voltage
and recovery times, use a Schottky diode.
Choose a diode wh ose maxi mum re verse
voltage rating is great er than the maxi mum
input voltage, and whose curre nt rating is
greater than the maximum load current. Table 2
lists example Schottky diodes an
d
manufacturers.
Table 2—Diode Selection Guide
Diodes
B280-13-F
B290
CMSH2-
100M
Voltage/ Current
Rating
80V, 2A
90V, 2A
100V, 2A
Manufacturer
Diodes Inc.
Diodes Inc.
Central Semi
Input Capacitor
The in put cu rrent t o t he st ep-down converter is
discontni uous, therefore a capacitor is requiredto
supply the AC current to the step-down converter
while maintaining the DC input voltage. Use lo w
ESR capacitors for the best performance. Ceramic
capacitors are preferred, but tantalum or lo w-ESR
electroyl ticcapacitors may alsosuffice.
For simplification, cho ose the input capacitor
with RMS c urrent rating greater than half of the
maximum load current.
MP2562 Rev. 0.91
4/5/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet MP2562.PDF ] | |
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