MP5010B – 3V-18V, 1A-5A PROGRAMMABLE CURRENT LIMIT SWITCH

MP5010B Rev. 1.0

www.MonolithicPower.com

11

4/3/2013

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

© 2012 MPS. All Rights Reserved.

The Enable/Fault line must remain above the

MID level for the output to turn ON.

The fault flag is an internal flip-flop that can be

set or reset under the following conditions:

1. Thermal Shutdown: set fault flag

2. Under-Voltage: reset fault flag

3. LOW on Enable/Fault pin: reset fault

flag

4. MID on Enable/Fault pin: no effect

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

MID.

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

MP5010B chips in a system. The Enable/Fault

lines are 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 turns OFF

Internally drives

Enable/Fault pin to

logic LOW

Flag is reset

Disables secondary output,

and resets fault flag.

Over Voltage

Limit output voltage

None

None

None

Thermal

Shutdown

Shutdown. The part

is latched OFF until

a UVLO or

externally driven to

ground.

Internally drives

Enable/Fault pin

to MID

Flag is Set

Disables secondary part

output.