MP5018 –5V, 1A-5A CURRENT LIMIT SWITCH WITH REVERSE CURRENT BLOCKING

AND OUTPUT OVER-VOLTAGE CLAMP

MP5018 Rev. 1.02

www.MonolithicPower.com

9

3/23/2016

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© 2016 MPS. All Rights Reserved.

PIN FUNCTIONS

Pin #

Name

Description

1, 2, 3

VCC

Supply Voltage. The MP5018 support 4.5V to 5.5V continuous input voltage and up to

16V maximum transient input voltage. Requires ceramic capacitor to decouple the input

rail. Connect using a wide PCB trace.

4

SAS

SAS=low to enable the part. SAS=high to disable the part. SAS pin has internal 700kΩ

pull-down resistor to ground, so it can automatically start up when SAS is floating.

5

EN/FAULT

The EN/FAULT pin is a tri-state, bi-directional interface. It can be used to enable the

output of the device by floating the pin, or disable the chip by pulling it to ground (using

an open drain or open collector device). If a thermal fault occurs or reverse current limit

is triggered, the voltage on this pin will go to an intermediate state to signal a monitoring

circuit that there is a device fault. When UVLO or SAS disable = 1, the voltage on this pin

will go to a low state. It can also be connected to another device in this family to cause a

simultaneous shutdown.

6

NC

No Connection.

7

SS

Soft start pin. Connect a capacitor from SS to ground to set the soft start time. Floating

this pin provides 13ms soft start time.

8

ILIMIT

Current Limit Set pin. Place a resistor between this pin and ground to set the value of the

current limit. Floating this pin provides 3A fixed current limit.

9, 10,

11

VOUT

The output voltage that is controlled by the IC.

12, Pad

GND

System Ground.