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PDF MP2372 Data sheet ( Hoja de datos )
| Número de pieza | MP2372 | |
| Descripción | Step-Down Converter | |
| Fabricantes | MPS | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MP2372 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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The Future of Analog IC Technology
DESCRIPTION
The MP2372 is a 925kHz step-down regulator
with a built-in power MOSFET. It achieves 3A
continuous output current over a wide input
supply range with excellent load and line
regulation.
Current mode operation provides fast transient
response and eases loop stabilization.
Fault condition protection includes cycle-by-
cycle current limiting and thermal shutdown.
Adjustable soft-start reduces the stress on the
input source at turn-on. In shutdown mode, the
regulator draws 20μA of supply current.
The MP2372 is available in an 8-pin SOIC
package with an exposed pad, and requires a
minimum number of readily available external
components to complete a 3A step-down DC to
DC converter solution.
MP2372
3A, 28V, 925kHz
Step-Down Converter
FEATURES
• 3A Continuous Output Current, 4A Peak
Output Current
• Programmable Soft-Start
• 100mΩ Internal Power MOSFET Switch
• Stable with Low ESR Output Ceramic
Capacitors
• Up to 91% Efficiency
• 20μA Shutdown Mode
• Fixed 925kHz Frequency
• Thermal Shutdown
• Cycle-by-Cycle Over Current Protection
• Wide 4.5V to 28V Operating Input Range
• Output is Adjustable From 0.92V to 21V
• Under Voltage Lockout
APPLICATIONS
• Distributed Power Systems
• Battery Chargers
• Pre-Regulator for Linear Regulators
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
INPUT
OPEN =
AUTOMATIC
STARTUP
C1
50V
C5
10nF
2
7 IN
EN
8
SS
4
C4
1
BS
SW
MP2372
FB
COMP
3
5
6 B330A
D1
C3
5.6nF
R1
R2
OUTPUT
3.3V
C2
6.3V
Efficiency Curve
100
VOUT=5V
90
80 VOUT=3.3V
70
60
0
VIN=12V
0.5 1.0 1.5 2.0 2.5 3.0
LOAD CURRENT (A)
MP2372 Rev. 1.0
1/23/2014
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
1
1 page  
MP2372 – 3A, 28V, 925kHz STEP-DOWN CONVERTER
ELECTRICAL CHARACTERISTICS
VIN = 12V, C1 = 10µF, C2 = 47µF, L = 10µH and TA = +25°C, unless otherwise
noted.
Operating Range
100.00
10.00
1.00
Steady State Operation
IOUT = 3A, VOUT=3.3V
Startup Through Enable
IOUT = 3A, VOUT=3.3V
0.10
1.0
10.0
Input Voltage (V)
100.0
Startup Through Enable
IOUT = 0A, VOUT=3.3V
VOUT
10mV/div.
VIN
5V/div.
VSW
10V/div.
IINDUCTOR
2A/div.
VOUT
2V/div.
VEN
5V/div.
VSW
10V/div.
IINDUCTOR
2A/div.
4ms/div.
VOUT
2V/div.
VEN
5V/div.
VSW
10V/div.
IINDUCTOR
1A/div.
4ms/div.
Shutdown Through Enable
IOUT = 3A, VOUT=3.3V
Shutdown Through Enable
IOUT = 0A, VOUT=3.3V
SHORT
VOUT
2V/div.
VEN
5V/div.
VSW
10V/div.
IINDUCTOR
2A/div.
VOUT
2V/div.
VEN
5V/div.
VSW
10V/div.
IINDUCTOR
1A/div.
1s/div.
VOUT
2V/div.
VIN
5V/div.
VSW
10V/div.
IINDUCTOR
2A/div.
MP2372 Rev. 1.0
1/23/2014
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
5
5 Page 
MP2372 – 3A, 28V, 925kHz STEP-DOWN CONVERTER
External Bootstrap Diode
Enough voltage of the bootstrap capacitor can
enhance the efficiency of the regulator and
increase the output capacity. The MP2372 can’t
output 3.3V/3A when the input voltage is only
about 5V. An External charge circuit shown in
Figure 4 can be a solution, and the applicable
conditions of the circuit are:
z VIN is only about 5V, and VOUT is 3.3V or less
z
The Duty cycle is high: D= VO
VIN
>60%
z The external bootstrap diode circuit can’t be
applied when VIN>6V
Figure 4—External Bootstrap Diode Circuit
D1 integrates two diodes in SOT-523 package
such as BAV199T which will not increase the
PCB size and the cost. The additional capacitor
C1 can be only 10nF.
MP2372 Rev. 1.0
1/23/2014
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet MP2372.PDF ] | |
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