MP5006 – 5V, 1A- 5A PROGRAMMABLE CURRENT LIMIT SWITCH WITH AUTO ENABLE

MP5006 Rev.0.92

www.MonolithicPower.com

12

12/27/2013

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2013 MPS. All Rights Reserved.

At time T5 the power device turns off and the

Enable/Fault pin is driven to the low level, again.

The temperature begins to fall.

The cycle between times T3, T4 and T5 could

repeat indefinitely, but at time T6 the short is

removed. At time T7 the die temperature is below

the thermal hysteresis level and the part turns on

once again. This time there is no short, so the

output starts in normal operation and the die

temperature cools down to the normal operating

range.

UNDER VOLTAGE LOCK OUT OPERATION

If the supply (input) is below the UVLO threshold,

the output is disabled, and the fault line is driven

low.

When the supply goes above the UVLO

threshold, the output is enabled and the

Enable/fault

pin

is

released.

When

the

Enable/fault pin is released it will be pulled high

resistor is required. In addition, the pull up

voltage is limited to 5 volts.

PCB LAYOUT

PCB layout is very important to achieve stable

operation. Please follow these guidelines and

take below Figure for reference.

Place Rlimit close to Ilimit pin, Cdv/dt close to

dv/dt pin and input cap close to VIN (Exposed

Pad). Keep the N/C pin float. Put vias in thermal

pad and ensure enough copper area near VIN

and VOUT to achieve better thermal performance.

Top Layer

Bottom Layer

Figure 4―PCB Layout