EV0060 Просмотр технического описания (PDF) - Monolithic Power Systems

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EV0060

1.2A, 6V, 800KHz Synchronous Rectified Step-Down Converter

Monolithic Power Systems 

EV0060 – 1.2A, 6V, 800KHz SYNCHRONOUS RECTIFIED STEP-DOWN CONVERTER

EVALUATION BOARD

QUICK START GUIDE

The output voltage of this board is set to 1.8V. The board layout accommodates most commonly used

inductors and output capacitors.

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

2. Attach an input voltage 2.6V ≤ VIN ≤ 6V and the input ground to the IN and GND pins,

respectively.

3. To enable the MP1567 apply a voltage, 2V ≤ VEN ≤ 6V, to the EN pin. To disable the MP1567

connect the EN pin to ground.

4. The output voltage VOUT can be changed by varying R3. Calculate the new value using the

formula:

R3

=

R4

×

⎜⎜⎝⎛

VOUT

VFB

− 1⎟⎟⎠⎞

Where VFB = 0.9V and R4 = 10kΩ.

For example, for VOUT = 2.5V:

R3

=

R4

×

⎜⎜⎝⎛

VOUT

VFB

−

1⎟⎟⎠⎞

=

10kΩ

×

⎜⎛

⎝

2.5V

0.9V

− 1⎟⎞ = 17.78kΩ

⎠

Therefore use a standard 1% value 17.8kΩ resistor.

Note: See Maximum Duty Cycle limits to determine allowable output voltages.

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.

EV0060 Rev. 1.2

www.MonolithicPower.com

5

4/22/2005

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2005 MPS. All Rights Reserved.

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