MP5403 datasheet(7/7 Pages) MPS

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EV5403-QB-02A – DUAL BUCK AND ONE LOAD SWITCH PMIC

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.

EV5403-QB-02A Rev.1.0

www.MonolithicPower.com

2/6/2017

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

QUICK START GUIDE

The output voltage of this board is set externally by operating from +2.7V to +6V for VIN1, +2V to +6V for

VIN2(if VIN1>2.7V) and +0.5V to +6V for VIN3(if VIN1>2.7V). The default output voltage of this board is set

to VOUT1=1.2V, VOUT2=1.2V.

1. Preset Power Supply to 2.7V

 VIN1  6V, 2V  VIN2  6V, 0.5V  VIN3  6V.

2. Turn Power Supply off.

3. Connect Power Supply terminals to:

a. Positive (+): VIN1, VIN2, VIN3(connect to VIN1 or VIN2 or external power)

b. Negative (–): GND

4. Connect Load to:

a. Positive (+): VOUT1

b. Negative (–): GND

c. Positive (+): VOUT2

d. Negative (–): GND

e. Positive (+): VOUT3

f. Negative (–): GND

5. Turn Power Supply on after making connections.

6. To enable the MP5403, apply a voltage, 1.3V

 VEN  6V, to the EN pin. To disable the MP5403,

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.

7. The output voltage VOUT can be changed by varying R2A or R2B. Calculate the new value by

formula:

OUT

R1A(orR1B)

R2A(orR2B)

0.6V





Figure 4

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