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© 2017 ROHM Co., Ltd.
No. 60AP001E Rev.001
© 2018 ROHM Co., Ltd.
No. 61AN002E Rev.001
May.2018
2017.4
Application Note
Power Management IC designed for “NXP
®
i.MX 8M Quad
”
BD71837MWV
Platform Design Guide
1. Introduction
BD71837MWV is a Power Management Integrated Circuit (PMIC) available in 68-QFN package and dedicated to the application
powered by 5V input. PMIC includes eight Buck convertors, seven LDOs, one internal load switch and crystal oscillator driver for RTC
clock. These functions are designed to support the specific power requirements from NXP
i.MX 8M platform to achieve the required
performance for cost-sensitive applications.
The below figure is the outline of the power map between PMIC and i.MX 8M SoC, showing that all voltage rails required by SoC are
satisfied.
“BD71837MWV Platform Design Guide” provides the guideline for designing PCB including recommendation for the PCB layer stack
up, the components placement and the PCB routings.
To reduce the risk that comes from PCB layout or parts placement, the guideline is strongly recommended to be applied to the PCB
design.
2.7V to 5.5V
BD71837MWV
BUCK1 0.9V / 3.6A
i.MX 8M Quad
i.MX 8M QuadLite
i.MX 8M Dual
LDO1 3.3V / 10mA
Power Mux Switch
1.8V/3.3V / 150mA
LPDDR4 Memory
SD Card
USB /
Li-Ion Battery
BUCK2 1.0V / 4.0A
BUCK3 1.0V / 2.1A
BUCK4 1.0V / 1.0A
LDO2 0.9V / 10mA
LDO7 3.3V / 150mA
BUCK6 3.3V / 3.0A
LDO3 1.8V / 150mA
LDO5 1.8V / 300mA
BUCK7 1.8V / 1.5A
LDO4 0.9V / 250mA
LDO6 0.9V / 300mA
BUCK5 1.0V / 2.5A
BUCK8 1.1V / 3.0A
I2C (slave)
Power Mode
Control Signals
Power
Sequencing
Controller
Die temp
UVLO
32.768kHz Crystal Oscillator Driver
Interrupt
VR Fault
Power On Key
Detection
Power On Key
Figure 1.1 The system power map
Figure 1.2 The package image
