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MP2303 Datasheet Preview

MP2303 Datasheet

340KHz Synchronous Rectified Step-Down Converter

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The Future of Analog IC Technology
MP2303
3A, 28V, 340KHz Synchronous Rectified
Step-Down Converter
DESCRIPTION
The MP2303 is a monolithic synchronous buck
regulator. The device integrates power
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 8-pin SOIC and 3x3
10-pin QFN packages, 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 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 and
3x3 QFN10 Packages
APPLICATIONS
Distributed Power Systems
Pre-Regulator for Linear Regulators
Notebook Computers
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Products, Quality Assurance page.
“MPS” and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
R4
100kΩ
VIN
C1
10μF/35V x 2
C5
10nF
BS
SS
IN EN
MP2303
SW COMP
C4
0.1μF
GND
L1
15μH
FB
R1
52.3kΩ
1%
R2
10kΩ
1%
C2
22μF/10V x 2
R5
47kΩ
C6
NS
C3
3.3nF
R3
6.98kΩ
VOUT
5V/3A
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. 1.0
2/8/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
1




MPS

MP2303 Datasheet Preview

MP2303 Datasheet

340KHz Synchronous Rectified Step-Down Converter

No Preview Available !

MP2303 – 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER
ORDERING INFORMATION
Part Number
Package
Top Marking
Temperature
MP2303DN*
MP2303DQ**
SOIC8E (Exposed Pad)
QFN10 (3mm x 3mm)
MP2303DN
K2
–40C to +85C
MP2303DQ
* For Tape & Reel, add suffix –Z (e.g. MP2303DN–Z);
For RoHS compliant packaging, add suffix –LF (e.g. MP2303DN–LF–Z)
** For Tape & Reel, add suffix –Z (e.g. MP2303DQ–Z);
For RoHS compliant packaging, add suffix –LF (e.g. MP2303DQ–LF–Z)
PACKAGE REFERENCE
TOP VIEW
BS
IN
SW
GND
1
2
3
4
8 SS
7 EN
6 COMP
5 FB
TOP VIEW
IN
SW
GND
GND
GND
1
2
3
4
5
10 SS
9 BS
8 EN
7 COMP
6 FB
MP2303_PD01_SOIC8N
SOIC8E (Exposed Pad)
EXPOSED PAD
ON BACKSIDE
MP2303_PD02_QFN10
QFN10 (3mm x 3mm)
ABSOLUTE MAXIMUM RATINGS (1)
Supply Voltage VIN .......................–0.3V to +30V
Switch Voltage VSW ...................................... 31V
Boost Voltage VBS ..........VSW – 0.3V to VSW + 6V
All Other Pins .................................–0.3V to +6V
Junction Temperature ...............................150°C
Continuous Power Dissipation (TA = +25°C)(2)
SOIC8E...................................................... 2.5W
QFN10 (3mmx3mm) .................................. 2.5W
Lead Temperature ....................................260°C
Storage Temperature ............. –65°C to +150°C
Recommended Operating Conditions (3)
Input Voltage VIN............................ 4.75V to 28V
Output Voltage VOUT ........................ 0.8V to 25V
Ambient Operating Temperature ... –40°C to +85°C
Thermal Resistance (4) θJA θJC
SOIC8E .................................. 50 ...... 10... C/W
3x3 QFN10 ............................. 50 ...... 12... C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
maximum junction temperature TJ(MAX), the junction-to-
ambient thermal resistance θJA, and the ambient temperature
TA. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by
PD(MAX)=(TJ(MAX)-TA)/ θJA. Exceeding the maximum
allowable power dissipation will cause excessive die
temperature, and the regulator will go into thermal shutdown.
Internal thermal shutdown circuitry protects the device from
permanent damage.
3) The device is not guaranteed to function outside of its
operating conditions.
4) Measured on JESD51-7 4-layer board.
MP2303 Rev. 1.0
2/8/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
2


Part Number MP2303
Description 340KHz Synchronous Rectified Step-Down Converter
Maker MPS
Total Page 15 Pages
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