MP5026

– 16V, 20A, 2.8mΩ RDS(ON), HOT-SWAP INTELLI-FUSE SOLUTION

MP5026 Rev. 1.0

MonolithicPower.com

4

7/5/2023

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© 2023 MPS. All Rights Reserved.

PIN FUNCTIONS

Pin #

Name

Description

1, 2, 3,

16, 25

VIN

System input power supply. The VIN pin is connected to the drain of the integrated

power MOSFET.

4, 26

GND

Ground.

5

OV

Over-voltage (OV) enable input. Pull the OV pin high to turn off the internal MOSFET.

Connect OV to an external resistor divider to set the over-voltage protection (OVP)

threshold.

6

EN/UV

Enable (EN) control and input voltage (VIN) under-voltage lockout (UVLO)

configuration. The EN/UV pin is the control input that turns the device on and off,

including the logic and power MOSFET. Pull EN/UV high to turn the device on; pull

EN/UV low to turn it off. Connect EN/UV to a resistor divider between the VIN and GND

pins to set the VIN UVLO threshold. The internal VCC is not controlled by EN/UV. Do not

float EN/UV.

7

TIMER

Timer configuration. Connect the TIMER pin to an external capacitor to set the hot-

plug insertion delay time (tIDT) and over-current (OC) fault time-out period.

8

ISET

Current limit configuration. Place a resistor between the ISET pin and ground to set

the OC limit.

9

IMON

Output current monitor. The IMON pin provides a voltage (VIMON) proportional to the

current flowing through the power device. Connect a resistor (RIMON) to ground to set the

IMON output voltage gain. Place a capacitor greater than 10nF in parallel with RIMON

during application. Do not float IMON.

10

ENTM

LOADEN blanking time configuration. Connect the ENTM pin to an external capacitor

to set the LOADEN blanking time. Once the EN/UV pin is active, the timer starts and

LOADEN de-assertion is blanked. If a fault occurs or EN/UV is pulled low during the

blanking time, then the device shuts down. If LOADEN is pulled low, the device does not

turn off until the blanking time ends.

11

FLTB

Fault bar. The FLTB pin is an open-drain output that is pulled to ground once a fault

occurs. The following faults can trigger FLTB: OC fault, short-circuit fault, over-

temperature (OT) fault, over-voltage (OV) fault, and drain-to-source (DS) or gate-to-

source (GS) short. Pull up FLTB to an external power supply via a 10k

Ω to 100kΩ

resistor.

12

LOADEN

Load enable input. The LOADEN pin is used in conjunction with EN/UV to turn the

MP5026

’s main power device on or off. LOADEN also shuts down the power MOSFET

after the LOADEN blanking time finishes. The power MOSFET cannot be turned back on

by only cycling the power on LOADEN.

13

PG

Power good. The PG pin is an open-drain output. Pull PG up to an external power

supply via a 10k

Ω to 100kΩ resistor. PG high indicates power good.

14

VCC

Internal 3.3V low-dropout (LDO) output. Place a 1µF decoupling capacitor close to the

VCC and GND pins.

15

SS

Soft start. Connect the SS pin to an external capacitor to set the soft-start time (tSS) of

the output voltage (VOUT). The internal circuit controls the VOUT slew rate at start-up.

Float SS to set tSS to the minimum time (1ms).

17, 18,

19, 20,

21, 22,

23, 24

VOUT

Output voltage. Connect the VOUT pin to the source of the integrated power MOSFET.

Place a Schottky diode between the VOUT and GND pins to absorb the negative voltage

spike.