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부품번호 | EV2104DJ-00A 기능 |
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기능 | 600mA Synchronous Buck Step-Down Converter | ||
제조업체 | MPS | ||
로고 | |||
www.DataSheet4U.com
TM
The Future of Analog IC Technology TM
DESCRIPTION
The EV2104 evaluation board is designed for
low dropout step down converter applications. It
implements the MP2104 1.7MHz Fixed
Frequency, Current Mode, PWM step-down
converter. The device integrates a main switch
and a synchronous rectifier for high efficiency
without an external Schottky diode. It is ideal for
powering portable equipments that runs from a
single cell Lithium-Ion (Li+) Battery. It can
supply 600mA of load current from a 2.5V to 6V
input voltage. The output voltage can be
regulated as low as 0.6V. In 100% Duty Cycle
Dropout operation, it works with minimum input
voltage as low as output voltage.
ELECTRICAL SPECIFICATIONS
Parameter
Input Voltage Range
Output Voltage
Load Max
Symbol
VIN
VOUT
IOUT
Value
2.5 – 6.0
1.8
600
Units
V
V
mA
EV2104DJ-00A
600mA Synchronous Buck
Step-Down Converter
FEATURES
• High Efficiency: Up to 95%
• 600mA Available Load Current
• 2.5V to 6V Input Voltage Range
• Output Voltage as Low as 0.6V
• 100% Duty Cycle in Dropout
• Short Circuit Protection
• Thermal Fault Protection
• <0.1µA Shutdown Current
• Programmable Enable Control
APPLICATIONS
Cellular and Smart Phones
Microprocessors/DSP Core Supplies
PDAs
MP3 Players
Digital Still and Video Cameras
• Portable Instruments
“Monolithic Power Systems” and “The Future of Analog IC Technology” are
Trademarks of Monolithic Power Systems, Inc.
EV2104DJ-00A EVALUATION BOARD
Dimensions (2.0”X x 2.0”Y x 0.5”Z)
Board Number
EV2104DJ-00A
MPS IC Number
MP2104DJ
Efficiency vs
Load Current
100
90 VIN = 3.3V
80
70 VIN = 4.2V
60
50
40
30
20
10
0
10 100 1000
LOAD CURRENT (mA)
MP2104-TPC01
EV2104DJ-00A Rev. 1.1
8/24/2005
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
1
EV2104DJ-00A – 600mA SYNCHRONOUS BUCK STEP-DOWN CONVERTER
INITIAL RELEASE
QUICK START GUIDE (ADJUSTABLE OUTPUT)
The default output voltage of this board is set to 1.8V.
The board layout accommodates most commonly used inductors and output capacitors.
1. Attach the positive and negative ends of the load to the VOUT and GND pins, respectively.
2. Attach the Input Voltage (2.5V ≤ VIN ≤ 6V) and Input Ground to the VIN and GND pins,
respectively.
3. To enable the MP2104 apply a voltage, 1.5V ≤ VEN ≤ 6V, to the EN pin. To disable the MP2104
apply a voltage, VEN < 0.3V, to the EN pin. The default setting for the jumper J1 on the board
connects VIN to the EN pin. In this configuration, the part will operate without applying any
external voltage to the EN pin.
4. The Output Voltage VOUT can be changed by varying R2. Calculate the new value by formula:
R2 =
R1
⎜⎜⎝⎛
VOUT
VFB
⎟⎟⎠⎞
−1
Where VFB = 0.6V and R1 = 300kΩ.
Example:
For VOUT = 2.5V:
R2
=
⎜⎛
⎝
300kΩ
2.5V
0.6V
⎟⎞
⎠
−
1
=
150kΩ
Therefore, use a 150kΩ standard 1% value.
QUICK START GUIDE (MODIFICATION FOR FIXED OUTPUT)
For modifying the EV2104DJ-00A to accommodate a fixed output voltage version of the MP2104:
1. Verify that a fixed output version of the MP2104 chip is on the evaluation board. Refer to
MP2104 datasheet for fixed voltage package codes.
2. Remove both R1 and R2.
3. Short R1 while leaving R2 open.
4. Attach the positive and negative ends of the load to the VOUT and GND pins, respectively.
5. Attach the Input Voltage (2.5V ≤ VIN ≤ 6V) and Input Ground to the VIN and GND pins,
respectively.
6. To enable the MP2104 apply a voltage, 1.5V ≤ VEN ≤ 6V, to the EN pin. To disable the MP2104
apply a voltage, VEN < 0.3V, to the EN pin. The default setting for the jumper J1 on the board
connects VIN to the EN pin. In this configuration, the part will operate without applying any
external voltage to the EN pin.
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.
Ev2104DJ-00A Rev. 1.1
8/24/2005
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
4
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부품번호 | 상세설명 및 기능 | 제조사 |
EV2104DJ-00A | 600mA Synchronous Buck Step-Down Converter | MPS |
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