MP2303DQ MPS [Monolithic Power Systems], MP2303DQ Datasheet

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MP2303DQ

Manufacturer Part Number
MP2303DQ
Description
3A, 28V, 340KHz Synchronous Rectified Step-Down Converter
Manufacturer
MPS [Monolithic Power Systems]
Datasheet

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Part Number
Manufacturer
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Part Number:
MP2303DQ-LF-Z
Manufacturer:
MPS/美国芯源
Quantity:
20 000
The Future of Analog IC Technology
DESCRIPTION
The MP2303 is a monolithic synchronous buck
regulator.
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
TYPICAL APPLICATION
MP2303 Rev. 0.92
5/2/2006
4.75V-28V
VIN
EV2303DN-00A
Board Number
The
device
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2.0”X x 1.5”Y x 0.5”Z
10nF
C5
integrates
Dimensions
GND
BS
IN
SW
MP2303
INITIAL RELEASE – SPECIFICATIONS SUBJECT TO CHANGE
COMP
© 2006 MPS. All Rights Reserved.
SS
EN
FB
power
www.MonolithicPower.com
TM
TM
3A, 28V, 340KHz Synchronous Rectified
FEATURES
APPLICATIONS
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
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
3x3 QFN10 Packages
Distributed Power Systems
Pre-Regulator for Linear Regulators
Notebook Computers
MP2303_TAC01
C3
3.3nF
VOUT
5V/3A
Enhanced
100
90
80
70
60
50
Step-Down Converter
0
Efficiency vs
Load Current
0.5
LOAD CURRENT (A)
1.0
8-Pin
MP2303
1.5
V
IN
2.0
= 24V
SOIC
V
V
IN
OUT
= 12V
MP2303-EC01
2.5
= 5V
and
3.0
1

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MP2303DQ Summary of contents

Page 1

The Future of Analog IC Technology DESCRIPTION The MP2303 is a monolithic synchronous buck regulator. The device integrates MOSFETS that provide 3A continuous load current over a wide operating input voltage of 4.75V to 28V. Current mode control provides fast ...

Page 2

... SS EN COMP FB Temperature Part Number* MP2303DQ –40°C to +85°C * For Tape & Reel, add suffix –Z (eg. MP2303DQ–Z) For RoHS compliant packaging, add suffix –LF (eg. MP2303DQ–LF–Z) (1) Recommended Operating Conditions Input Voltage V Output Voltage V + 0.3V IN Ambient Operating Temperature ... –40°C to +85°C ...

Page 3

TM MP2303 – 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER ELECTRICAL CHARACTERISTICS V = 12V +25°C, unless otherwise noted Parameter High-Side Switch-On Resistance Low-Side Switch-On Resistance High-Side Switch Leakage Current Upper-Switch Current Limit Lower-Switch Current Limit ...

Page 4

TM MP2303 – 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER PIN FUNCTIONS 3x3 SOIC8N QFN10 Name Description Pin # Pin # High-Side Gate Drive Boost Input. BS supplies the drive for the high-side Channel MOSFET switch. ...

Page 5

TM MP2303 – 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER TYPICAL PERFORMANCE CHARACTERISTICS V = 12V 3.3V 10µ 10µ 22µ Efficiency vs Load Current ...

Page 6

TM MP2303 – 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER TYPICAL PERFORMANCE CHARACTERISTICS V = 12V 3.3V 10µ 10µ 22µ OUT 1V/div 1A/div. Steady ...

Page 7

TM MP2303 – 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER OPERATION + -- 0.95V + ERROR 0.8V + AMPLIFIER COMP -- LOCKOUT 2.5V + COMPARATOR + -- 1.5V SHUTDOWN COMPARATOR The ...

Page 8

TM MP2303 – 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER APPLICATIONS INFORMATION COMPONENT SELECTION Setting the Output Voltage The output voltage is set using a resistive voltage divider from the output voltage to FB pin. The voltage divider divides the ...

Page 9

MP2303 – 3A, 28V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER For simplification, choose the input capacitor whose RMS current rating greater than half of the maximum load current. The input capacitor can be electrolytic, tantalum or ceramic. When using electrolytic or tantalum ...

Page 10

TM MP2303 – 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER In this case, a third pole set by the optional compensation capacitor (C6) compensation resistor (R3) compensate the effect of the ESR zero on the loop gain. This pole is ...

Page 11

TM MP2303 – 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER To optimize the compensation components for conditions not listed in Table 2, the following procedure can be used. 1. Choose the compensation resistor (R3) to set the desired crossover frequency. ...

Page 12

TM MP2303 – 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER TYPICAL APPLICATION CIRCUITS INPUT 4.75V to 28V Figure 3—MP2303 with 2.5V Output, 47µF/6.3V Ceramic Output Capacitor INPUT 4.75V to 28V Figure 4—MP2303 with 3.3V Output, 47µF/6.3V Ceramic Output Capacitor MP2303 ...

Page 13

TM MP2303 – 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER PACKAGE INFORMATION NOTE 2 0.013(0.330) 0.020(0.508) 0.050(1.270)BSC NOTE 3 0.189(4.800) 0.197(5.000) 0.053(1.350) 0.068(1.730) NOTE: 1) Control dimension is in inches. Dimension in bracket is millimeters. 2) Exposed Pad Option (N-Package) ...

Page 14

TM MP2303 – 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER 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 ...

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