BD71837AMWV - Documentation

BD71837AMWV integrates all power rails required by i.MX 8M processors and system peripherals. In addition to integrate a sequencer compatible with power modes supported by i.MX 8M processors, making it possible to significantly reduce the development time, decrease size, and simplify application design.

The power supply circuit of the BD71837AMWV, designed specifically for the power supply system of the i.MX 8M processor family, integrates an 8 buck converters, 7 LDOs, and control logic that allows it to supply power not only to the processor, but the required DDR memory as well – all from a single chip. A 1.8V/3.3V power switch for SDXC cards is also built in, along with a 32.768kHz crystal oscillator driver and multiple protection circuits such as output short-circuit, output over-voltage/current, and thermal shutdown.
Buck conversion efficiency from 83 to 95% is achieved for 0.7V to 3.3V output, and the wide input voltage range from 2.7V to 5.5V supports a variety of power sources, from batteries to USB, making them ideal for i.MX 8M applications.
Furthermore, when single-sided mounting and Type-3 PCB is assumed, 56 fewer parts are needed compared with discrete solutions, reducing PCB area by up to 45%.

* This is a standard-grade product.
For Automotive usage, please contact Sales.

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Application Note

BD71837AMWV Frequently Asked Questions
This document question-and-answer format for BD71837AMWV which is a Power Management IC for NXP i.MX 8M System-on-Chip (SoC) platform.
Platform Design Guide
The “BD71837AMWV Platform Design Guide” provides design guideline which recommends the PCB layer stack up, the components placement and the PCB routing. To reduce the risk that comes from PCB layout or parts placement, the guideline is strongly recommended to be adapted to the PCB design.
Errata information on product "BD71837MWV"
The problem described on errata has been solved with new product BD71837AMWV. The BD71837MWV will be replaced by BD71837AMWV. BD71837AMWV has same foot print and functionality with previous BD71837MWV.
Thermal Resistance
The definition and how to use thermal resistance and thermal characterization parameter of packages for ROHM’s integrated circuit are described in this application note.
Impedance Characteristics of Bypass Capacitor
This application note focuses on the impedance characteristics of capacitors, and explains cautions for selecting bypass capacitors.
Part Explanation
For ICs