MP5086 –5.5V, 7A, LOW RDSON LOAD SWITCH WITH CURRENT MONITORING AND NTC COMPARATOR

MP5086 Rev.1.0

www.MonolithicPower.com

13

11/6/2014

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

© 2014 MPS. All Rights Reserved.

APPLICATION INFORMATION

IMON Resistor Selection

The current limit value can be set by IMON

resistor. The current limit can be gotten by

equation (1).

The current limit threshold is suggested to 10%

~ 15% higher than maximum load current. For

example, if the system’s full load is 7A, set the

current limit to 7.7A.

Design Example

Some design example and are provided below.

See Table 1 and Figure 5.

Table 1

(V)

Max Load Range

(A)

Rlimit

(kΩ)

5

3

26.1

5

5

15.8

5

7.5

10.5

Figure 5: Typical Application Schematic

Layout Guide

PCB layout is very important to achieve stable

operation. Please follow these guidelines and

Put enough vias around IC to achieve better

thermal performance.

GND

EN

Vin

Vin

Vout

GND

GND

IMON

NTC

C1

C5

R1

GND

GND

OTP

C4

R2

C2

C3

Figure 6: Recommended Layout