MP2101DQ MPS [Monolithic Power Systems], MP2101DQ Datasheet - Page 5

• Manufacturer Part Number: MP2101DQ
• Description: 1.6MHz, 800mA Synchronous Step-Down Converter plus 200mA LDO
• Manufacturer: MPS [Monolithic Power Systems]

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.
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
1. Attach the positive and negative ends of the load to the VOUT1/VOUT2 and GND pins,
2. With the input supply off, attach the input voltage, 2.5V ≤ V
3. To enable the MP2101, apply a voltage, 1.5V ≤ V
4. The output voltages V
5. The JP1 Setting:
6. EN1/EN2 Setting: JP2 and JP3
respectively.
VIN and GND pins, respectively. Then turn on the power supply.
MP2101, apply a voltage, V
the board connects V
applying any external voltage to the EN1/EN2 pin.
Calculate the new value by the formula:
Where V
Example:
For V
Therefore, use a 95.3kΩ standard 1% value.
The JP1 can set the LDO input voltage from V
The EN1/EN2 signals can be turned on by connecting to the input voltage V
signal.
R
R
R
2
4
2
=
=
=
⎛
⎜ ⎜
⎝
⎛
⎜
⎝
⎛
⎜ ⎜
⎝
OUT1
V
2
0
V
300
V
V
5 .
6 .
EV2101DQ-00A – 1.6MHz, 800mA SYNCHRONOUS STEP-DOWN PLUS 200mA LDO
OUT
OUT
FB
FB
FB1
R
R
V
V
= 2.5V:
1
2
k
1
1
3
2
⎞
⎟
⎠
Ω
= V
⎞
⎟ ⎟
⎠
⎞
⎟ ⎟
⎠
−
−
−
1
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
1
1
FB2
=
94
= 0.6V, R1 = 300kΩ, and R4 = 60.4kΩ
.
k 7
IN
OUT1
Ω
to the EN1/EN2 pin. In this configuration, the part will operate without
and V
EN
< 0.3V, to the EN1/EN2 pin. The default setting for the jumper on
© 2006 MPS. All Rights Reserved.
OUT2
www.MonolithicPower.com
can be changed by varying R2 and R4, respectively.
IN1
or V
EN
≤ 6V, to the EN1/EN2 pin. To disable the
OUT1
.
IN
≤ 6V, and the input ground to the
EVALUATION BOARD
IN1
or an external
5