Power Management IC for Mini Applications Processors

Date
04/25/2019

Categories:
Integrated Circuits (ICs), Power Management

Tag:
@ROHMsemi #nxpsemiconductors #powermanagementic #pmic #ics #psd

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Contributes to longer operating time and smaller size of smart devices such as smart speakers, networked audio, smart displays

Kyoto and Santa Clara, Calif. – ROHM announced the availability of BD71847AMWV, a highly integrated and efficient power management IC (PMIC) optimized for NXP Semiconductors’ i.MX 8M Mini family of application processors, which features exceptional computing, audio, video, and graphics performance. BD71847AMWV is the latest addition to ROHM’s growing portfolio of PMICs designed for NXP’s i.MX application processors. With the BD71837MWV, which was introduced a year ago to support the high-performance i.MX 8M Quad and Dual applications processors, ROHM has power solutions for all members of the i.MX 8M family.

i.MX 8M Mini applications processors allow customers to incorporate voice interface to audio/video streaming devices at minimal cost. They integrate up to four Arm Cortex-A53 cores operating up to 1.8GHz along with an Arm Cortex-M4 that operates at up to 400 MHz for low standby power consumption. In addition, support for 1080p video processing, 2D/3D graphics, advanced audio functions, and various high-speed interfaces makes the i.MX 8M Mini ideal for a wide range of consumer and industrial applications.

Leveraging ROHM’s expertise in analog power and advanced BCD process, BD71847AMWV integrates all power rails required by the processor as well as power supplies for DDR and common system IO. In addition to DC/DC converters with industry-leading efficiency of 95%, the PMIC features programmable power sequencer for flexible power control and management, seamless hardware control interface to i.MX 8M Mini, buffered sleep clock, protection functions, etc.. The high level of integration, customizations for i.MX 8M Mini applications processors, and programmability help to shorten development time, to lower system BOM cost, and to minimize solution footprint.

Going forward, ROHM will continue to expand its product portfolio to support future members of the i.MX 8M family and to offer optimized solutions for different applications and market segments.

Key Advantages

1. All-in-one system PMIC optimized for i.MX 8M Mini applications processors
BD71847AMWV’s power rails are designed to meet the power requirements of i.MX 8M Mini applications processors, The PMIC integrates 6 DC/DC buck converter,  6 LDOs,  1.8V/3.3V power switch for SDXC cards, 32-kHz crystal driver and buffered output clock, extensive monitoring and protection circuits, and programmable sequencer and power state control logic. 

The high level of integration allows PMIC to supply power to memory and system peripherals, reducing system BOM cost and solution footprint. The 2.7V-5.5V input voltage range supports a variety of power sources, from single-cell Li-ion battery to USB and wall adapter.

2. Compact solution footprint and low-cost PCB design
Besides integrating all necessary power functions in a compact 56-pin 7mm x 7mm QFN package, the pin layout is carefully designed to ensure easy connection to NXP’s i.MX 8M Mini applications processor and DDR memory, considerably reducing design effort and risk. The integration of all required reduces the number of external parts by 42 and mounting area by 42% compared with discrete solutions (assuming Type 3 PCB for single-sided mounting).  With 2-sided mounting, the board size could be as small as 400mm2.

3. Configurability and programmability to allow optimization for wide variety of system designs
To support many different applications and use cases, BD71847AMWV incorporates a programmability into the power control sequencer and all power rails. Many operating parameters such as output voltage, power state transitions, reset behavior, etc. are OTP configurable and/or software programmable.


Features

- Input voltage range: 2.7V to 5.5V
- 6 programmable buck DC/DC converters
- 6 general purpose LDOs
- OTP configurable and software programmable power control sequencer
- Power-control hardware sideband signaling compatible with i.MX 8M Mini’s
- 1.8V / 3.3v Power multiplexer for high speed SDXC card 
- Power button functionality
- 32.768kHz crystal oscillator driver
- Extensive protection functions (soft start, power rail error detection, overvoltage, overcurrent, etc.)
- I2C I/F (1 MHz max.)

Also provides an environment that allows users to easily evaluate the BD71847AMWV. BD71847AMWV is found on NXP i.MX 8M Mini Evaluation Kit. Its driver is integrated in the EVK BSP.

For more information, visit www.rohm.com and www.nxp.com.

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