New Industry Products

PMIC for NXP i.MX 8M Mini Family of Application Processors

April 26, 2019 by Scott McMahan

Rohm announced the availability of BD71847AMWV, a highly integrated power management IC (PMIC). The company optimized the PMIC for NXP® Semiconductors' i.MX 8M Mini family of application processors, which boast exceptional computing, audio, video, and graphics performance.

Typical applications for the PMICs include streaming media boxes and dongles, AV receivers and wireless soundbars, as well as industrial HMI, SBC, IPC, and panel computers.

BD71847AMWV is the latest addition to Rohm's growing portfolio of PMICs designed for NXP's i.MX application processors. Along with the BD71837MWV, which Rohm introduced a year ago to support the i.MX 8M Quad and Dual applications processors, the company offers power solutions for all members of the i.MX 8M family.

"ROHM is a valued i.MX ecosystem partner. The BD71847AMWV is a good choice for our i.MX 8M Mini applications processors customers looking to maximize performance. It is also available mounted on a reference board, providing a single-chip power solution optimized for processors," said Leonardo Azevedo, i.MX Senior Director of Marketing at NXP Semiconductors.

i.MX 8M Mini applications processors let customers incorporate voice interface to audio/video streaming devices at a minimal cost. They integrate up to four ARM® Cortex®-A53 cores operating up to 1.8GHz and an ARM Cortex-M4 that operates at up to 400MHz for low standby power consumption.

In addition, the processors provide support for 1080p video processing, 2D/3D graphics, advanced audio functions, and various high-speed interfaces making the i.MX 8M Mini suitable for a broad range of consumer and industrial applications.

ROHM PMIC Lineup for NXP's i.MX Application Processors

Leveraging Rohm's expertise in advanced BCD process and analog power, BD71847AMWV integrates all power rails that the processor requires as well as power supplies for DDR and common system IO.

DC-DC converters with efficiency of 95% can use the PMIC.

The PMIC features a programmable power sequencer for flexible power control and management, it also offers a seamless hardware control interface to i.MX 8M Mini, a buffered sleep clock, protection functions, and more. The high level of integration, customizations for i.MX 8M Mini applications processors, and programmability help to shorten development time, lower system BOM cost, and minimize solution footprint.

Rohm's new PMIC makes it possible to reduce PCB area and the number of parts required.

Rohm says it 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

Rohm designed the BD71847AMWV's power rails to meet the power requirements of i.MX 8M Mini applications processors. The PMIC integrates 6 dc-dc buck converters, 6 LDOs, a 1.8V/3.3V power switch for SDXC cards, 32-kHz crystal driver, and buffered output clock. The device comes with extensive monitoring and protection circuits, a programmable sequencer, and power state control logic.

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

  1. Compact solution footprint and low-cost PCB design

Besides integrating all needed power functions in a 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, significantly reducing design effort and risk. The integration of all required components reduces the number of external parts by 42 and decreases 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

Saves space and reduces the number of parts required

  1. Configurability and programmability allow optimization for broad variety of system designs

For many different applications and use cases, BD71847AMWV incorporates a programmability into the power control sequencer and all power rails. Numerous operating parameters such as output voltage, power state transitions, reset behavior, and others are OTP configurable and/or software programmable.


  • 6 Buck Regulators
  • 2.0MHz Switching Frequency.
  • (BUCK1, BUCK2, BUCK5, BUCK7, and BUCK8).
  • 1.5MHz Switching Frequency. (BUCK6)
  • Target Efficiency: 83% to 95%.
  • Output Current & Voltage.
    • BUCK1: 3.0A, 0.7V to 1.3V/10mV step, DVS
    • BUCK2: 3.0A, 0.7V to 1.3V/10mV step, DVS
    • BUCK5: 3.0A, 0.70V to 1.35V/8steps, DVS
    • BUCK6: 3.0A, 2.6V to 3.3V/100mV step
    • BUCK7: 1.5A, 1.605V to 1.995V/8steps
    • BUCK8: 3.0A, 0.8V to 1.4V/10mV step
  • 6ch Linear Regulators (6 LDOs)
    • LDO1: 10 mA, 3.0V to 3.3V, 1.6V to 1.9V
    • LDO2: 10 mA, 0.9V, 0.8V
    • LDO3: 300 mA, 1.8V to 3.3V
    • LDO4: 250 mA, 0.9V to 1.8V
    • LDO5: 300 mA, 0.8V to 3.3V
    • LDO6: 300 mA, 0.9V to 1.8V
  • Power Mux Switch
    • 1.8V Input: 500mΩ (Max)
    • 3.3V Input: 500mΩ (Max)
  • 32.768kHz Crystal Oscillator Driver
  • Power Button Detector
  • Protection and Monitoring: Soft Start, Power Rails Fault Detection, UVLO,
  • OVP and TSD
  • OTP Configurable Power Sequencing
  • OTP and Software Programmable Output Voltage, Ramp Rates
  • Hardware Signaling with SoC for Transition into or out of Low Power States
  • Interfaces:
    • I2C: 100kHz/400kHz, 1MHz
    • Power-on Reset Output: POR_B, RTC_RESET_B,
    • Watchdog Reset Input: WDOG_B:
    • Power State Control: PMIC_STBY_REQ, PMIC_ON_REQ, PWRON_B
    • Interrupt to SoC: IRQ_B
  • Type3 PCB Applicable

Key Specifications

  • Input Voltage Range (VSYS): 2.7V to 5.5V
  • SNVS State Current: 30µA (Typ)
  • SUSPEND State Current: 126µA (Typ)
  • IDLE State Current: 147µA (Typ)
  • RUN State Current: 147µA (Typ)
  • Operating Temperature Range: -40°C to +85°C
  • Evaluation Kit for the i.MX 8M Mini

Availability: March 2019 (samples), August (OEM quantities)

Evaluation Kit for i.MX 8M Mini

The evaluation kit for the i.MX 8M Mini 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.