DFE252012F-R47M datasheet(117/122 Pages) AD

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Typical Application Circuits (continued)

2+1+1 Phase Configuration

LX4

SNS4P

BST4

PGND4

LX3

SNS3P

SNS3N

PGND3

LX2

SNS2P

PGND2

LX1

SNS1P

SNS1N

VOUT12

8A MAX

PGND1

BST3

BST2

BST1

VIO

SDA

SCL

IRQB

MFIO7

MFIO6

MFIO5

MFIO4

MFIO3

MFIO2

AGND

VDD

MAX77542

CVDD 1μF

6.3V (0402)

CBST2 0.1μF

10V (0201)

CBST1 0.1μF

10V (0201)

L4 (NOTE 2)

MFIO8

MFIO1

IN1

IN2

DC SOURCE

2.8V TO 16V

SYS

CSYS 2.2μF

25V (0402)

CIN3/CIN4 10μF

25V (0603)

IN3

IN4

CIN1/CIN2 10μF

25V (0603)

CVL13/CVL24 2.2μF

6.3V (0402)

VL12

VL34

μC

IO SUPPLY

1.1V TO 2.2V

CVIO 1μF

6.3V (0402)

EN1

EN2

EN3

EN4

POK1

POK4

(NOTE 5)

CBST4 0.1μF

10V (0201)

CBST3 0.1μF

10V (0201)

2Φ + 1Φ + 1Φ

(3 CHANNELS)

VOUT3

4A MAX

VOUT4

4A MAX

L3 (NOTE 2)

L2 (NOTE 2)

L1 (NOTE 2)

COUT4

6x 22μF 10V

(NOTE 3)

(0603/0805)

COUT3

6x 22μF 10V

(NOTE 3)

(0603/0805)

COUT2

6x 22μF 10V

(NOTE 3)

(0603/0805)

COUT1

6x 22μF 10V

(NOTE 3)

(0603/0805)

POK2

POK3

ALT_IN

CALT_IN 2.2μF (NOTE 1)

25V (0603)

VALT_IN

(2.8V TO 6.0V)

NOTE 1: ONLY INSTALL IF ALT_IN IS USED. IF ALT_IN IS UNUSED, DO NOT POPULATE.

NOTE 2: SEE THE

INDUCTOR SELECTION SECTION.

NOTE 3: SEE THE

OUTPUT CAPACITOR SELECTION SECTION.

NOTE 4: CONNECT IRQB, SDA, AND SCL TO AGND WHEN UNUSED.

NOTE 5: EXAMPLE MFIO FUNCTION MAP. RECONFIGURABLE USING I2C OR CFG1. SEE THE

MFIO FUNCTIONS SECTION.

SEL1

SEL2

SEL3

SEL4

CFG1

CFG2

(NOTE 4)

MAX77542

16VIN/16A, Quad-Phase High-Efficiency Buck

Converter

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