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PDF MP2363 Data sheet ( Hoja de datos )
| Número de pieza | MP2363 | |
| Descripción | 365KHz Step-Down Converter | |
| Fabricantes | MPS | |
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The Future of Analog IC Technology
DESCRIPTION
The MP2363 is a non-synchronous step-down
regulator with an integrated 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 MP2363 requires a minimum number of
readily available external components to
complete a 3A step-down DC to DC converter
solution.
The MP2363 is available in an 8-pin SOIC
package.
EVALUATION BOARD REFERENCE
Board Number
EV2363DN-00A
Dimensions
2.0”X x 1.9”Y x 0.4”Z
MP2363
3A, 27V, 365KHz
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 95% Efficiency
• 20µA Shutdown Mode
• Fixed 365KHz frequency
• Thermal Shutdown
• Cycle-by-Cycle Over Current Protection
• Wide 4.75V to 27V 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
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
INPUT
4.75V to 27V
OPEN = AUTOMATIC
STARTUP
2 1 10nF
7 IN
EN
BS 3
SW
8
SS
MP2363
5
FB
GND
COMP
46
B330A
OPEN
6.8nF
OUTPUT
2.5V
3A
Efficiency Curve
VIN = 12V
100
VOUT=5.0V
90
80 VOUT=2.5V
70 VOUT=3.3V
60
50
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
LOAD CURRENT (A)
MP2363 Rev. 1.0
6/15/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
1
1 page  
MP2363 – 3A, 27V, 365KHz STEP-DOWN CONVERTER
OPERATION
The MP2363 is a current-mode step-down
regulator. It regulates an input voltage between
4.75V to 27V down to an output voltage as low as
0.92V, and is able to supply up to 3A of load
current.
The MP2363 uses current-mode control to
regulate the output voltage. The output voltage
is measured at the FB pin through a resistive
voltage divider and amplified through the internal
error amplifier. The output current of the
transconductance error amplifier is presented at
COMP where a network compensates the
regulation control system. The voltage at COMP
is compared to the switch current measured
internally to control the output voltage.
The converter uses an internal N-Channel
MOSFET switch to step-down the input voltage
to the regulated output voltage. Since the
MOSFET requires a gate voltage greater than
the input voltage, a boost capacitor connected
between SW and BS drives the gate. The
capacitor is charged by an internal 5V supply
while SW is low.
An internal 10Ω switch from SW to GND is used
to insure that SW is pulled to GND when SW is
low to fully charge the boost.capacitor.
IN 2
EN 7
INTERNAL
REGULATORS
OSCILLATOR
35KHz/
365KHz
SLOPE
COMP
CLK
+
1.2V --
--
SHUTDOWN
COMPARATOR
LOCKOUT
COMPARATOR
CURRENT
SENSE
AMPLIFIER
+
--
+ SQ
RQ
-- CURRENT
COMPARATOR
2.54V/
2.33V
+
+
-- 1.8V
FREQUENCY
FOLDBACK
COMPARATOR
-- 0.35V 0.92V
5 FB
SS 8
+ ERROR
AMPLIFIER
6 COMP
Figure 1—Functional Block Diagram
5V
1 BS
3 SW
4 GND
MP2363 Rev. 1.0
6/15/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
5
5 Page 
MP2363 – 3A, 27V, 365KHz STEP-DOWN CONVERTER
PACKAGE INFORMATION
SOIC8N (EXPOSED PAD)
PIN 1 IDENT.
0.229(5.820)
0.244(6.200)
NOTE 2
NOTE 4
0.150(3.810)
0.157(4.000)
0.013(0.330)
0.020(0.508)
0.050(1.270)BSC
SEE DETAIL "A"
0.0075(0.191)
0.0098(0.249)
0.011(0.280) x 45o
0.020(0.508)
0.053(1.350)
0.068(1.730)
NOTE 3
0.189(4.800)
0.197(5.000)
0o-8o
0.049(1.250)
0.060(1.524)
SEATING PLANE
0.001(0.030)
0.004(0.101)
0.016(0.410)
0.050(1.270)
DETAIL "A"
.050 .028
0.200 (5.07 mm)
0.140 (3.55mm)
0.060
Land Pattern
NOTE:
1) Control dimension is in inches. Dimension in bracket is millimeters.
2) Exposed Pad Option (N-Package) ; 2.31mm -2.79mm x 2.79mm - 3.81mm.
Recommend Solder Board Area: 2.80mm x 3.82mm = 10.7mm2 (16.6 mil2)
3) The length of the package does not include mold flash. Mold flash shall not exceed 0.006in. (0.15mm) per side.
With the mold flash included, over-all length of the package is 0.2087in. (5.3mm) max.
4) The width of the package does not include mold flash. Mold flash shall not exceed 0.10in. (0.25mm) per side.
With the mold flash included, over-all width of the package is 0.177in. (4.5mm) max.
NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications.
Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS
products into any application. MPS will not assume any legal responsibility for any said applications.
MP2363 Rev. 1.0
6/15/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet MP2363.PDF ] | |
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