MP5018

5V, 1A-5A Current Limit Switch

with Reverse Current Blocking

and Output Over-voltage Clamp

MP5018 Rev. 1.02

www.MonolithicPower.com

1

3/23/2016

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The Future of Analog IC Technology

DESCRIPTION

The MP5018 is a protection device designed to

protect circuitry on the output from transients on

shorts and transients coming from the output.

At startup, inrush current is limited by the slew

rate at the output. The slew rate is controlled by

a small capacitor at the SS pin. Floating the SS

pin provides 13ms soft-start time.

The maximum load at the output is current

limited. The magnitude of the current limit is

controlled by an external resistor from ILIMIT to

GND. Floating ILIMIT pin provides 3A fixed

current limit. By controlling the gate voltage of a

pair of N-channel MOSFETs, any current

flowing from output to input is blocked.

Under Voltage Lockout (UVLO) assures that

input is above the minimum operating threshold,

before the power device is turned on. If input

voltage goes above 5.8V, the output voltage will

be limited at 5.8V with fast response.

The EN/Fault pin is a bi-directional, three-level

I/O with a weak pull-up. It can be used to

enable or disable MP5018, or indicate a fault

condition.

The device is available in a QFN12 (2mmx3mm)

package.

FEATURES

• SAS Disable to support DEVSLP or

POWER_DOWN

• 4.5V to 5.5V Continued Operating Input

Range

• 16V Absolute Maximum Input Voltage

• 5.8V Fast OVP Response

• Reverse Current Blocking

• Integrated 45mΩ Power FET

• Adjustable Current-Limit or Fixed Current

Limit when floating ILIMIT pin

• 210μA Typical Low Quiescent Current

• Adjustable Soft Start time

• Fault Indication

• Latch-off Thermal Protection

• Available in QFN12(2mmx3mm) Package

• ESD Compliant to 2kV HBM and 1kV

CDM

APPLICATIONS

• HDD, SSD

• Hot Swap Systems

• Gaming

• Set-top Boxes/Smart TV

• PCIe Cards

• Switches/Routers

All MPS parts are lead-free and adhere to the RoHS directive. For MPS green

status, please visit MPS website under Products, Quality Assurance page.

“MPS” and “The Future of Analog IC Technology” are registered trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION