MP2104DJ MPS [Monolithic Power Systems], MP2104DJ Datasheet - Page 4

• Manufacturer Part Number: MP2104DJ
• Description: 600mA Synchronous Buck Step-Down Converter
• Manufacturer: MPS [Monolithic Power Systems]

QUICK START GUIDE
The default output voltage of this board is set to 1.8V.
The board layout accommodates most commonly used inductors and output capacitors.
QUICK START GUIDE
For modifying the EV2104DJ-00A to accommodate a fixed output voltage version of the MP2104:
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
1. Attach the positive and negative ends of the load to the VOUT and GND pins, respectively.
2. Attach the Input Voltage (2.5V ≤ V
3. To enable the MP2104 apply a voltage, 1.5V ≤ V
4. The Output Voltage V
1. Verify that a fixed output version of the MP2104 chip is on the evaluation board. Refer to
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 ≤ V
6. To enable the MP2104 apply a voltage, 1.5V ≤ V
respectively.
apply a voltage, V
connects V
external voltage to the EN pin.
Where V
Example:
For V
Therefore, use a 150kΩ standard 1% value.
MP2104 datasheet for fixed voltage package codes.
respectively.
apply a voltage, V
connects V
external voltage to the EN pin.
R
R
2
2
=
=
⎛
⎜ ⎜
⎝
⎛
⎜
⎝
OUT
V
2
0
300
V
5 .
6 .
OUT
FB
FB
R
= 2.5V:
V
V
1
k
IN
IN
= 0.6V and R1 = 300kΩ.
⎞
⎟
⎠
Ω
⎞
⎟ ⎟
⎠
−
−
to the EN pin. In this configuration, the part will operate without applying any
to the EN pin. In this configuration, the part will operate without applying any
1
1
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
EV2104DJ-00A – 600mA SYNCHRONOUS BUCK STEP-DOWN CONVERTER
=
150
EN
EN
< 0.3V, to the EN pin. The default setting for the jumper J1 on the board
k
< 0.3V, to the EN pin. The default setting for the jumper J1 on the board
OUT
Ω
(ADJUSTABLE OUTPUT)
(MODIFICATION FOR FIXED OUTPUT)
can be changed by varying R2. Calculate the new value by formula:
© 2005 MPS. All Rights Reserved.
IN
IN
www.MonolithicPower.com
≤ 6V) and Input Ground to the VIN and GND pins,
≤ 6V) and Input Ground to the VIN and GND pins,
EN
EN
≤ 6V, to the EN pin. To disable the MP2104
≤ 6V, to the EN pin. To disable the MP2104
INITIAL RELEASE
4