EV2112DQ-00A Datasheet, PDF (4/4 Pages) Monolithic Power Systems – 1A, 1MHz Synchronous Step-Down Converter

EV2112DQ-00A – 1A, 1MHz SYNCHRONOUS STEP-DOWN CONVERTER
EVALUATION BOARD
QUICK START GUIDE
The output voltage of this board is set to 1.8V, and the board accommodates most commonly used
inductors and capacitors.
1. Attach the positive and negative ends ot the load to the VOUT and GND pins, respectively.
2. Attach the input voltage (2.5V ≤ V_IN ≤ 6V) and input ground to the VIN and GND pins,
respectively. The IC should automatically startup.
To operate the IC through the enable pin without automatic startup, first remove resistor R3.
Apply a voltage greater than 1.5V to enable the IC; lower than 0.3V to shut it off. Be careful not
to exceed 6V on the EN pin.
3. The output voltage of this board can be changed by varying the value of resistor R2. Calculate
the value of R2 using the equation:
R2 = ^R1
V_{OUT − 1}
V_FB
Where V_FB=0.6V and R1=499kΩ.
For example, if V_OUT=2.5V is desired:
R2 = ^499k = 158k
2.5V _{− 1}
0.6V
Therefore, use a 158kΩ (1%) resistor for R2.
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.
EV2112DQ-00A Rev. 1.0
www.MonolithicPower.com
4
3/17/2006
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