EV5424-R-00A datasheet(5/44 Pages) MPS

5 / 44 page

MP5424

– 5V POWER MANAGEMENT IC WITH I2C AND MTP

MP5424 Rev. 1.0

MonolithicPower.com

12/6/2021

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

PIN FUNCTIONS

Pin #

Name

Description

FB1

Buck 1 feedback. Connect buck

1’s output directly to the FB1 pin.

PWRON

Start-up/shutdown input. The PWRON pin is a logic input pin that can start up or shut down

the device. PWRON has a weak internal pull-up current.

VIN1

Buck 1 supply voltage input. The MP5424 operates from a 2.7V to 5.5V input rail. Use a

ceramic decoupling capacitor to decouple the input rail. Use a wide PCB trace for VIN1 path.

VIN1, VIN2, VIN3, VIN4, and AVIN should be connected to the same bus voltage (VBUS).

SW1

Buck 1 switch output. Use a wide PCB trace for SW1 path.

GND1

Buck 1 and buck 3 power ground. The GND1 pin requires special consideration during PCB

layout. Connect GND1 to ground using copper traces and vias.

SW3

Buck 3 switch output. Use a wide PCB trace for SW3 path.

VIN3

Buck 3 supply voltage input. The MP5424 operates from a 2.7V to 5.5V input rail. Use a

ceramic decoupling capacitor to decouple the input rail. Use a wide PCB trace for VIN3 path.

VIN1, VIN2, VIN3, VIN4, and AVIN should be connected to the same VBUS.

FB3

Feedback of buck3.

Connect buck 3’s output directly to the FB3 pin.

RSTO

Reset output from the PMIC to CPU. The RSTO pin is an open-drain output. RSTO requires

an external pull-up resistor.

SCL

I2C clock signal input.

SDA

I2C data pin.

OUT4

LDO4 output. The LDO4 pin is powered by VIN5.

VIN5

LDO4 and LDO5 power input pin. This VIN5 pin operates from a 2.7V to 5.5V input voltage

(VIN). Connect the VIN5 and VIN1 pins if LDO4 and LDO5 are not used.

FB4

Buck 4 feedback.

Connect buck ’s output directly to the FB4 pin.

VIN4

Buck 4 supply voltage input. The MP5424 operates from a 2.7V to 5.5V input rail. Use a

ceramic decoupling capacitor to decouple the input rail. Use a wide PCB trace for VIN4 path.

VIN1, VIN2, VIN3, VIN4, and AVIN should be connected to the same VBUS.

SW4

Buck 4 switch output. Use a wide PCB trace for SW4 path

GND2

Buck 2 and buck 4 power ground. The GND2 pin requires special consideration during PCB

layout. Connect GND2 to ground using copper traces and vias.

SW2

Buck 2 switch output. Use a wide PCB trace for SW2 path

VIN2

Buck 2 supply voltage input. The MP5424 operates from a 2.7V to 5.5V input rail. Use a

ceramic decoupling capacitor to decouple the input rail. Use a wide PCB trace for VIN2 path.

VIN1, VIN2, VIN3, VIN4, and AVIN must be connected to the same bus voltage.

FB2

Buck 2 feedback.

Connect buck 2’s output directly to the FB2 pin.

OUT2

LDO 2 output. LDO 2 is powered by VIN2. If the OUT2 pin is configured as EN1, then OUT2

acts as an input pin. Pull EN1 high to turn on the PMIC; pull EN1 low to turn it off.

LSWI

Load switch input.

LSWO/

EN1

Load switch output or EN1. If the LSWO/EN1 pin is configured as EN1, then LSWO/EN1

acts as an input pin.

AGND

Analog ground. Connect the AGND pin to the GND1 and GND2 pins.

AVIN

Power supply input for logic circuitry. Use a 0.1µF ceramic capacitor to bypass the AVIN

pin to AGND. Connect AVIN to the system input via

a . Ω resistor. VIN1, VIN2, VIN3, VIN4,

and AVIN should be connected to the same VBUS.

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