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PDF MP2303 Data sheet ( Hoja de datos )
| Número de pieza | MP2303 | |
| Descripción | 340KHz Synchronous Rectified Step-Down Converter | |
| Fabricantes | MPS | |
| Logotipo |  |
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TM
MP2303
3A, 28V, 340KHz Synchronous Rectified
Step-Down Converter
The Future of Analog IC Technology TM
INITIAL RELEASE – SPECIFICATIONS SUBJECT TO CHANGE
DESCRIPTION
The MP2303 is a monolithic synchronous buck
regulator. The device integrates 120mΩ
MOSFETS that provide 3A continuous load
current over a wide operating input voltage of
4.75V to 28V. Current mode control provides
fast transient response and cycle-by-cycle
current limit.
An adjustable soft-start prevents inrush current
at turn-on. In shutdown mode, the supply
current drops to 1µA.
This device, available in an 8-pin SOIC
package, provides a very compact system
solution with minimal reliance on external
components.
EVALUATION BOARD REFERENCE
Board Number
EV2303DN-00A
Dimensions
2.0”X x 1.5”Y x 0.5”Z
FEATURES
• 3A Output Current
• Wide 4.75V to 28V Operating Input Range
• Integrated 120mΩ Power MOSFET Switches
• Output Adjustable from 0.8V to 25V
• Up to 95% Efficiency
• Programmable Soft-Start
• Stable with Low ESR Ceramic Output Capacitors
• Fixed 340KHz Frequency
• Cycle-by-Cycle Over Current Protection
• Input Under Voltage Lockout
• Thermally Enhanced 8-Pin SOIC Package
APPLICATIONS
• Distributed Power Systems
• Pre-Regulator for Linear Regulators
• Notebook Computers
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
VIN
4.75V-28V
C5
10nF
1
BS
8
SS
27
IN EN
MP2303
36
SW COMP
4
GND
5
FB
C3
3.3nF
C6
(optional)
VOUT
5V/3A
MP2303_TAC01
Efficiency vs
Load Current
100
VIN = 12V
90
80 VIN = 24V
70
60
50
0
VOUT = 5V
0.5 1.0 1.5 2.0 2.5 3.0
LOAD CURRENT (A)
MP2303-EC01
MP2303 Rev. 0.91
3/10/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
1
1 page  
TM
MP2303 – 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER
INITIAL RELEASE – SPECIFICATIONS SUBJECT TO CHANGE
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 12V, VO = 3.3V, L = 10µH, CIN = 10µF, COUT = 22µF x 2, TA = +25°C, unless otherwise noted.
Power Off through Enable
VIN = 24V, VOUT = 3.3V, IOUT = 2A
VOUT
1V/div.
VOUT
1V/div.
IL
1A/div.
4ms/div.
MP2303-TPC05
VEN
5V/div.
IL
1A/div.
VSW
10V/div.
MP2303-TPC06
Steady State Test
VIN = 12V, VOUT = 3.3V, IOUT = 1A
Load Transient Test
VIN = 24V, VOUT = 3.3V,
IOUT = 0A-1A step with CFF = 470pF
Short Circuit Protection
VIN = 24V, VOUT = 3.3V, IOUT = 0A
VIN
200mV/div.
IL
500mA/div.
VOUT
AC Coupled
10mV/div.
VCOMP
200mV/div.
VOUT
100mV/div.
IL
1A/div.
VSW
20V/div.
MP2303-TPC07
VOUT
1V/div.
VCOMP
1V/div.
IL
2A/div.
MP2303-TPC08
MP2303-TPC09
MP2303 Rev. 0.91
3/10/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
5
5 Page 
TM
MP2303 – 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER
INITIAL RELEASE – SPECIFICATIONS SUBJECT TO CHANGE
TYPICAL APPLICATION CIRCUITS
INPUT
4.75V to 28V
C5
10nF
2
7 IN
EN
1
BS 3
SW
MP2303
8 SS
FB 5
GND
COMP
46
C6
(optional)
C3
8.2nF
D1
B130
(optional)
OUTPUT
2.5V
3A
MP2303_F03
Figure 3—MP2303 with 2.5V Output, 47µF/6.3V Ceramic Output Capacitor
INPUT
4.75V to 28V
D2
C5
10nF
2
7 IN
EN
1
BS 3
SW
MP2303
8 SS
GND
FB 5
COMP
46
C6
(optional)
C3
4.7nF
D1
B130
(optional)
OUTPUT
3.3V/3A
MP2303_F04
Figure 4—MP2303 with 3.3V Output, 47µF/6.3V Ceramic Output Capacitor
MP2303 Rev. 0.91
3/10/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MP2303.PDF ] | |
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