MP20051DN datasheet(4/4 Pages) MPS

4 / 4 page

EV20051DN-00A – LOW NOISE, 1A LINEAR REGULATOR

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.

EV20051DN-00A Rev. 1.01

www.MonolithicPower.com

8/3/2011

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

QUICK START GUIDE (ADJUSTABLE OUTPUT)

The output voltage of this board is set externally which ranges from 0.8V to 5V by operating from +2.5V

to +5.5V input as the figure 4. The default output voltage of this board is set to 1.1V.

The board layout accommodates most commonly used resistors and capacitors.

1. Attach the positive and negative ends of the load to the VOUT and GND pins, respectively.

2. Attach the Input Voltage (2.5V ≤ VIN ≤ 5.5V) and Input Ground to the VIN and GND pins respectively.

3. To enable the MP20051, apply a voltage 1.5V ≤ VEN ≤ 5.5V, to the EN pin. To disable the MP20051,

apply a voltage, VEN < 0.4V, to the EN pin. The EN pin can be connected to VIN with a 100kΩ

resistor for automatic startup.

4. The Output Voltage VOUT can be changed by varying R1. Calculate the new value by formula:

OUT

R1 R2(





Where VFB = 0.8V and R2 = 10kΩ.

Example:

For VOUT = 1.1V:

1.1

R1 10kΩ

3.75kΩ

0.8











Therefore, use a 3.75kΩ standard 1% value.

Figure 4

MP20051DN Datasheet(PDF) 4 Page - Monolithic Power Systems