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PCB Design Guidelines for MCF8316C and MCF8315C
SLLA643
August 2024
MCF8315C
,
MCF8315C-Q1
,
MCF8316C-Q1
CONTENTS
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PCB Design Guidelines for MCF8316C and MCF8315C
1
Abstract
Trademarks
1
Introduction
2
Power Pin Design Recommendations
2.1
VM
2.2
Charge Pump: CPH, CPL, CP
2.3
Buck Converter: FB_BK, SW_BK, GND_BK
2.4
AVDD
2.5
DVDD
2.6
PGND, AGND, DGND
2.7
Thermal Pad
3
MCF831xC Buck Regulator Overview
3.1
Buck Regulator Mode of Operation
3.2
Buck Regulator Output Voltage
3.3
Buck Power Sequencing
3.4
Buck Inductor Selection
3.5
MCF831xC Operation Without Buck Regulator
4
MCF831xC IO Pins Design Recommendations
4.1
SPEED Pin
4.2
BRAKE, DIR, DRVOFF pins
4.3
EXT_CLK, EXT_WD
4.4
ALARM
4.5
DACOUT1, DACOUT2
4.6
SDA, SCL
4.7
nFAULT and FG pin
5
MCF831xC PCB Schematic and Layout Recommendations
5.1
Single Ground Plane
5.2
Single Ground with AVDD Shorted to FB_BK
5.3
Two Grounds
6
Summary
7
References
IMPORTANT NOTICE
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Application Note
PCB Design Guidelines for MCF8316C and MCF8315C
