MP5000A – 12V, 1A-5A PROGRAMMABLE CURRENT LIMIT SWITCH

MP5000A Rev. 1.01

www.MonolithicPower.com

11

10/16/2014

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1. Thermal Shutdown: set fault flag

2. Under Voltage: reset fault flag

3. low voltage on Enable/Fault pin: reset

fault flag

4. mid voltage on Enable/Fault pin: no effect

Under a fault, the Enable/Fault pin is driven to

the mid level.

There are 4 types of faults, and each fault has a

direct and indirect effect on the Enable/Fault pin

and the internal fault flag.

In a typical application there are one or more of

the

MP5000A

chips

in

a

system.

The

Enable/Fault lines will typically be connected

together.

Table 1—Fault Function Influence in Application

Fault description

Internal action

Effect on Fault Pin

Effect on Flag

Effect on secondary Part

Short/over current

Limit current

none

none

none

Under Voltage

Output is

turned off

Internally drives

Enable/Fault pin to

Logic low

Flag is reset

Secondary part output is

disabled, and fault flag is

reset.

Over Voltage

Limit output

voltage

None

None

None

Thermal

Shutdown

Shutdown part

The part is

latched off until

a UVLO or

externally driven

to ground.

Internally drives

Enable/Fault pin

to mid level

Flag is set

Secondary part output is

disabled.