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PDF MP2307 Data sheet ( Hoja de datos )
| Número de pieza | MP2307 | |
| Descripción | 340KHz Synchronous Rectified Step-Down Converter | |
| Fabricantes | MPS | |
| Logotipo |  |
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The Future of Analog IC Technology
MP2307
3A, 23V, 340KHz Synchronous Rectified
Step-Down Converter
DESCRIPTION
The MP2307 is a monolithic synchronous buck
regulator. The device integrates 100mΩ
MOSFETS that provide 3A of continuous load
current over a wide operating input voltage of
4.75V to 23V. Current mode control provides
fast transient response and cycle-by-cycle
current limit.
An adjustable soft-start prevents inrush current
at turn-on and in shutdown mode, the supply
current drops below 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
EV2307DN-00A
Dimensions
2.0”X x 1.5”Y x 0.5”Z
FEATURES
• 3A Continuous Output Current
4A Peak Output Current
• Wide 4.75V to 23V Operating Input Range
• Integrated 100mΩ Power MOSFET Switches
• Output Adjustable from 0.925V to 20V
• 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
• Networking Systems
• FPGA, DSP, ASIC Power Supplies
• Green Electronics/Appliances
• Notebook Computers
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
INPUT
4.75V to 23V
C5
10nF
21
7
IN
EN
BS
SW
3
8 SS
MP2307
FB 5
GND
COMP
46
C3
3.9nF
OUTPUT
3.3V
3A
MP2307_TAC01
Efficiency vs
Load Current
100
95
90 VIN = 12V
VIN = 5V
85
80 VIN = 23V
75
70
65
60
55
50
0.1
1.0
LOAD CURRENT (A)
10
MP2307_EC01
MP2307 Rev. 1.9
5/28/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
1
1 page  
MP2307 – 3A, 23V, 340KHz SYNCHRONOUS RECTIFIED STEP-DOWN CONVERTER
PIN FUNCTIONS
Pin # Name Description
1
BS
High-Side Gate Drive Boost Input. BS supplies the drive for the high-side N-Channel MOSFET
switch. Connect a 0.01µF or greater capacitor from SW to BS to power the high side switch.
Power Input. IN supplies the power to the IC, as well as the step-down converter switches.
2 IN Drive IN with a 4.75V to 23V power source. Bypass IN to GND with a suitably large capacitor
to eliminate noise on the input to the IC. See Input Capacitor.
Power Switching Output. SW is the switching node that supplies power to the output. Connect
3 SW the output LC filter from SW to the output load. Note that a capacitor is required from SW to
BS to power the high-side switch.
4 GND Ground (Connect the exposed pad to Pin 4).
Feedback Input. FB senses the output voltage and regulates it. Drive FB with a resistive
5 FB voltage divider connected to it from the output voltage. The feedback threshold is 0.925V. See
Setting the Output Voltage.
Compensation Node. COMP is used to compensate the regulation control loop. Connect a
6 COMP series RC network from COMP to GND. In some cases, an additional capacitor from COMP to
GND is required. See Compensation Components.
7
EN
Enable Input. EN is a digital input that turns the regulator on or off. Drive EN high to turn on
the regulator; low to turn it off. Attach to IN with a 100kΩ pull up resistor for automatic startup.
Soft-Start Control Input. SS controls the soft-start period. Connect a capacitor from SS to GND
8 SS to set the soft-start period. A 0.1µF capacitor sets the soft-start period to 15ms. To disable the
soft-start feature, leave SS unconnected.
MP2307 Rev. 1.9
5/28/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
5
5 Page 
MP2307 – 3A, 23V, 340KHz SYNCHRONOUS RECTIFIED STEP-DOWN CONVERTER
TYPICAL APPLICATION CIRCUIT
INPUT
4.75V to 23V
C5
10nF
21
7
IN
EN
BS
SW
3
8 SS
MP2307
FB 5
GND
COMP
46
C6
(optional)
C3
3.9nF
D1
B130
(optional)
OUTPUT
3.3V
3A
MP2307_F03
Figure 4—MP2307 with 3.3V Output, 22uF/6.3V Ceramic Output Capacitor
MP2307 Rev. 1.9
5/28/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MP2307.PDF ] | |
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