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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
TM
EV2109DQ-00A – DUAL 800mA, 6V, 1.2MHz SYNCHRONOUS STEP-DOWN CONVERTER
EVALUATION BOARD
EVALUATION BOARD SCHEMATIC
EN1
VIN
C5
NS
1 U1 10
EN1
2
FB1
SW1
9
GND
3
IN2
MP2109
8
IN1
4
GND
SW2
5
7
FB2
EN2
6
VOUT1
1.8V / 800mA
VOUT2
1.2V / 800mA
EN2
C6
NS
EV2109_S01
EV2109DQ-00A BILL OF MATERIALS
Qty Ref Value Description
2 C1, C2 10µF Ceramic Capacitor, 6.3V, X5R
2 C3, C4 22µF Ceramic Capacitor, 6.3V, X5R
2 C5, C6 NS Do Not Stuff
2 L1, L2 2.2µH Inductor, 1.2A
3
R1, R3,
R4
300kΩ
Resistor, 1%
2 R2 150kΩ Resistor, 1%
2 R5, R6 100kΩ Resistor, 5%
1 U1
DC-DC Converter
Package
1206
1206
Manufacturer
Any
Any
Manufacturer P/N
SMD
0603
0603
0603
QFN10
(3mm x 3mm)
Sumida
Any
Any
Any
MPS
CDRH3D16-2R2
MP2109DQ
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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