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PDF MP2467 Data sheet ( Hoja de datos )
| Número de pieza | MP2467 | |
| Descripción | Step-Down Converter | |
| Fabricantes | MPS | |
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Hay una vista previa y un enlace de descarga de MP2467 (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
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The Future of Analog IC Technology
DESCRIPTION
The MP2467 is a high frequency step-down
switching regulator with integrated internal
high-side, high voltage power MOSFET. It
provides 2.5A output with current mode control
for fast loop response and easy compensation.
The wide 6V to 36V input range accommodates
a variety of step-down applications, including
those in automotive systems. A 100µA
operational quiescent current allows use in
battery-powered applications.
High power conversion efficiency over a wide
load range is achieved by scaling down the
switching frequency at light load condition to
reduce the switching and gate driving losses.
The frequency foldback prevents inductor
current runaway during startup and thermal
shutdown provides reliable, fault tolerant
operation.
The MP2467 is available in thermally enhanced
SOIC8 package.
EVALUATION BOARD REFERENCE
Board Number
Dimensions
EV2467DN-00A
1.8”X x 1.8”Y x 0.4”Z
MP2467
2.5A, 36V, 500kHz
Step-Down Converter
FEATURES
• 100μA Quiescent Current
• Wide 6V to 36V Operating Input Range
• 150mΩ Internal Power MOSFET
• 500kHz Fixed Switching Frequency
• Ceramic Capacitor Stable
• Internal Soft-Start
• Precision Current Limit without a Current
Sensing Resistor
• Up to 95% Efficiency
• Output Adjustable from 0.8V to 30V
• Available in SOIC8 with Exposed Pad
Packages
APPLICATIONS
• Game Machines
• Automotive Systems
• Industrial Power Systems
• Distributed Power Systems
• Printer 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 Quality Assurance. “MPS” and “The
Future of Analog IC Technology” are Registered Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
C4
100nF
8
VIN
7 VIN
BST
SW 1
EN
2 EN
FB 4
MP2467
6 RSET
COMP 3
GND
5
D1
C3
220pF
VOUT
3.3V
Efficiency vs.
Load Current
100
90
80
70 VIN=12VVIN=24V
60
50
40
30
0
VOUT=3.3V
0.5 1.0 1.5 2.0
LOAD CURRENT (A)
2.5
MP2467 Rev. 1.11
www.MonolithicPower.com
1/24/2014
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
1
1 page  
MP2467 – 2.5A, 36V, 500kHz STEP-DOWN CONVERTER
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 12V, C1 = 10µF, C2 = 22µF, L = 10µH and TA = +25°C, unless otherwise noted.
Efficiency vs.
Load Current
100
90
80
70 VIN=12V VIN=24V
60
50
VOUT=2.5V
40
0 0.5 1.0 1.5 2.0 2.5
LOAD CURRENT (A)
Efficiency vs.
Load Current
100
90
VIN=12V
80 VIN=24V
70
60
50
40
0
VOUT=5V
0.5 1.0 1.5 2.0 2.5
LOAD CURRENT (A)
Steady State
VOUT=5V, IOUT=0.1A
VOUT
AC Coupled
10mV/div.
Steady State
VOUT=5V, IOUT=1A
VOUT
AC Coupled
10mV/div.
Steady State
VOUT=5V, IOUT=2A
VOUT
AC Coupled
10mV/div.
VSW
10V/div.
IL
1A/div.
1 v.
VSW
10V/div.
IL
1A/div.
2 v.
VSW
10V/div.
IL
2A/div.
2 v.
MP2467 Rev. 1.11
www.MonolithicPower.com
1/24/2014
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
5
5 Page 
MP2467 – 2.5A, 36V, 500kHz STEP-DOWN CONVERTER
Table 1—Inductor Selection Guide
Part Number
Wurth Electronics
7447789002
7447789003
7447789004
744066100
744771115
744771122
TDK
RLF7030T-2R2
RLF7030T-3R3
RLF7030T-4R7
SLF10145T-100
SLF12565T-150M4R2
SLF12565T-220M3R5
Toko
FDV0630-2R2M
FDV0630-3R3M
FDV0630-4R7M
919AS-100M
919AS-160M
919AS-220M
Inductance (µH) Max DCR (Ω) Current Rating (A)
2.2 0.019
3.3 0.024
4.7 0.033
10 0.035
15 0.025
22 0.031
4
3.42
2.9
3.6
3.75
3.37
2.2 0.012
3.3 0.02
4.7 0.031
10 0.0364
15 0.0237
22 0.0316
5.4
4.1
3.4
3
4.2
3.5
2.2 0.021
3.3 0.031
4.7 0.049
10 0.0265
16 0.0492
22 0.0776
5.3
4.3
3.3
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 switch is off. To
reduce losses due to the diode forward voltage
and recovery times, use a Schottky diode.
Choose a diode whose maximum reverse
voltage rating is greater than the maximum
input voltage, and whose current rating is
greater than the maximum load current. Table 2
lists example Schottky diodes and
manufacturers.
Table 2—Diode Selection Guide
Diodes
B240A-13-F
B340A-13-F
CMSH2-40M
CMSH3-40MA
Voltage/
Current
Rating
40V, 2A
40V, 3A
40V, 2A
40V, 3A
Manufacturer
Diodes Inc.
Diodes Inc.
Central Semi
Central Semi
Input Capacitor
The input current to the step-down converter is
discontinuous, therefore a capacitor is required to
supply the AC current to the step-down converter
while maintaining the DC input voltage. Use low
ESR capacitors for the best performance. Ceramic
capacitors are preferred, but tantalum or low-ESR
electrolytic capacitors may also suffice.
Since the input capacitor (C1) absorbs the input
switching current it requires an adequate ripple
current rating. The RMS current in the input
capacitor can be estimated by:
IC1 = ILOAD ×
VOUT
VIN
×⎜⎜⎛1−
⎝
VOUT
VIN
⎟⎞
⎟
⎠
The worse case condition occurs at VIN = 2VOUT,
where:
IC1
=
ILOAD
2
MP2467 Rev. 1.11
www.MonolithicPower.com
1/24/2014
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet MP2467.PDF ] | |
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