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PDF EV2101DQ-00A Data sheet ( Hoja de datos )
| Número de pieza | EV2101DQ-00A | |
| Descripción | 800mA Synchronous Step-Down Converter plus 200mA LDO | |
| Fabricantes | MPS | |
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TM
The Future of Analog IC Technology TM
EV2101DQ-00A
1.6MHz, 800mA Synchronous
Step-Down Converter plus 200mA LDO
EVALUATION BOARD
DESCRIPTION
The EV2101DQ-00A is the evaluation board for
the MP2101 step-down converter. It is designed
for high efficiency, step-down applications.
The MP2101 is a 1.6MHz current mode
synchronous buck converter plus LDO, which
provides two regulated output rails. Both control
loops are internally compensated, and all power
devices are integrated. Channel 1 is a
synchronous buck providing up to 92% efficiency
and 800mA output current from a 2.5V to 6V
input voltage. Channel 2 is an LDO that can
supply up to 200mA of load current from either
the power input or the output of channel 1 to
minimize the overall power loss and output
noises.
The MP2101 is available in a space-saving
3mm x 3mm QFN10 package with an exposed
pad.
FEATURES
• 0.8A and 0.2A Outputs
• 2.5V to 6V Operating Input Range
• Independently Adjustable Outputs from 0.6V
to VIN
• Independently External Enable Control
• PWROK Pin Monitors Output Regulation
• ±3% Output Voltage Reference Over
Temperature
• Small Solution Size
APPLICATIONS
• DVD+/-RW drive
• Smart phones
• PDAs
• Digital Cameras
• Portable Instruments
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
ELECTRICAL SPECIFICATIONS
Parameter
Input Voltage Range
Output Voltage
Load Max
Symbol
VIN
VOUT1
VOUT2
IOUT1
IOUT2
Value
2.5 – 6.0
1.8
1.2
800
200
Units
V
V
V
mA
mA
EV2101DQ-00A EVALUATION BOARD
(L x W x H) 2.3” x 2.0” x 0.4”
(5.8cm x 5.1cm x 1.0cm)
Board Number
EV2101DQ-00A
MPS IC Number
MP2101DQ
Efficiency vs
Load Current
100
95
90 VIN=3.3V
85
80
75 VIN=4.2V
70
65
60
55
50
45
40
35
10
VIN=5.0V
100
LOAD CURRENT (mA)
1000
EV2101DQ-00A Rev. 1.1
8/18/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
1
1 page  
EV2101DQ-00A – 1.6MHz, 800mA SYNCHRONOUS STEP-DOWN PLUS 200mA LDO
EVALUATION BOARD
QUICK START GUIDE
The output voltages on this board are set to 1.8V and 1.2V. The board layout accommodates most
commonly used inductors and output capacitors.
1. Attach the positive and negative ends of the load to the VOUT1/VOUT2 and GND pins,
respectively.
2. With the input supply off, attach the input voltage, 2.5V ≤ VIN ≤ 6V, and the input ground to the
VIN and GND pins, respectively. Then turn on the power supply.
3. To enable the MP2101, apply a voltage, 1.5V ≤ VEN ≤ 6V, to the EN1/EN2 pin. To disable the
MP2101, apply a voltage, VEN < 0.3V, to the EN1/EN2 pin. The default setting for the jumper on
the board connects VIN to the EN1/EN2 pin. In this configuration, the part will operate without
applying any external voltage to the EN1/EN2 pin.
4. The output voltages VOUT1 and VOUT2 can be changed by varying R2 and R4, respectively.
Calculate the new value by the formula:
R2 =
R1
⎜⎜⎝⎛
VOUT1
VFB1
⎟⎟⎠⎞
−
1
R4 =
R3
⎜⎜⎝⎛
VOUT2
VFB2
⎟⎟⎠⎞
−
1
Where VFB1 = VFB2 = 0.6V, R1 = 300kΩ, and R4 = 60.4kΩ
Example:
For VOUT1 = 2.5V:
R2
=
300kΩ
⎜⎛
⎝
2.5V
0.6V
⎟⎞
⎠
−
1
=
94.7kΩ
Therefore, use a 95.3kΩ standard 1% value.
5. The JP1 Setting:
The JP1 can set the LDO input voltage from VIN1 or VOUT1.
6. EN1/EN2 Setting: JP2 and JP3
The EN1/EN2 signals can be turned on by connecting to the input voltage VIN1 or an external
signal.
NOTICE: The information in this document is subject to change without notice. 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.
EV2101DQ-00A Rev. 1.1
8/18/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
5
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