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EV2109DQ-00A 데이터시트 PDF




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부품번호 EV2109DQ-00A 기능
기능 1.2MHz Synchronous Step-Down Converter Evaluation Board
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EV2109DQ-00A 데이터시트, 핀배열, 회로
www.DataSheet4U.com
TM
The Future of Analog IC Technology TM
EV2109DQ-00A
Dual 800mA, 6V, 1.2MHz Synchronous
Step-Down Converter Evaluation Board
DESCRIPTION
The EV2109DQ-00A is the evaluation board for
the MP2109. The MP2109 contains two
independent 1.2MHz constant frequency,
current mode, PWM step-down converters.
Each converter integrates a main switch and a
synchronous rectifier for high efficiency without
an external Schottky diode. The MP2109 is
ideal for powering portable equipment that runs
from a single cell Lithium-Ion (Li+) battery. Each
converter can supply 800mA of load current
from a 2.5V to 6V input voltage. The output
voltage can be regulated as low as 0.6V. It can
also run at 100% duty cycle for low dropout
applications.
ELECTRICAL SPECIFICATIONS
Parameter
Input Voltage
Output Voltage 1
Output Voltage 2
Load Max
Symbol
VIN1/IN2
VOUT1
VOUT2
IOUT1/OUT2
Value
2.5 to 6
1.8
1.2
800
Units
V
V
V
mA
FEATURES
Up to 95% Efficiency
800mA Load Current on Each Channel
2.5V to 6V Input Voltage Range
Output Voltage as Low as 0.6V
APPLICATIONS
Cellular and Smart Phones
Microprocessors and DSP Core Supplies
PDAs
MP3 Players
Digital Still and Video Cameras
Portable Instruments
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
EV2109DQ-00A EVALUATION BOARD
Efficiency vs
Load Current
100
VOUT=1.8V
90
80 VOUT=1.2V
70
(L x W x H) 2.0” x 1.6” x 0.4”
(5.0cm x 4.0cm x 1.0cm)
Board Number Package MPS IC Number
EV2109DQ-00A
QFN10
(3mm x 3mm)
MP2109DQ
60
50
0.0
0.2 0.4 0.6
LOAD CURRENT (A)
0.8
EV2109_EC01
EV2109DQ-00A Rev. 1.1
10/14/2005
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
1




EV2109DQ-00A pdf, 반도체, 판매, 대치품
TM
EV2109DQ-00A – DUAL 800mA, 6V, 1.2MHz SYNCHRONOUS STEP-DOWN CONVERTER
EVALUATION BOARD
QUICK START GUIDE
The output voltages of this board are set to 1.8V (VOUT1) and 1.2V (VOUT2). The board layout
accommodates most commonly used inductors and output capacitors.
1. Attach the positive and negative ends of the first load to the VOUT1 and GND pins, respectively.
If using both outputs, attach the positive and negative ends of the second load to the VOUT2
and GND pins, respectively.
2. Attach the input voltage 2.5V VIN 6V and input ground to VIN and GND pins respectively.
3. A 100kpull-up resistor has been connected to both the EN1 and EN2 pins, so both VOUT1
and VOUT2 will turn on without applying any external voltage to the EN1 and EN2 pins.
4. To turn on VOUT1/VOUT2 by using the EN1/EN2 functions, apply a voltage, 1.5V VEN1/EN2
6V, to the EN1/EN2 pin. To disable VOUT1/VOUT2, apply a voltage, VEN1/EN2 < 0.3V, to the
EN1/EN2 pin.
5. The output voltages VOUT1 and VOUT2 can be changed by varying R2 and R4, respectively.
Calculate the new values by the following formulae:
R2 =
R1
⎜⎜⎝⎛
VOUT1
VFB
⎟⎟⎠⎞
1
R4 =
R3
⎜⎜⎝⎛
VOUT2
VFB
⎟⎟⎠⎞
1
Where VFB = 0.6V, R1 = 300kand R3 = 300k.
Example:
For VOUT1 = 1.8V:
R2
=
300k
⎜⎛
1.8V
0.6V
⎟⎞
1
=
150k
Therefore, use a 150kstandard 1% value.
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.
EV2109DQ-00A Rev. 1.1
10/14/2005
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
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부품번호상세설명 및 기능제조사
EV2109DQ-00A

1.2MHz Synchronous Step-Down Converter Evaluation Board

MPS
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