System PMIC for NXP-i.MX 8M Nano

BD71850MWV integrates all power rails required by i.MX 8M Nano processors and system peripherals. In addition to integrate a sequencer compatible with power modes supported by i.MX 8M Nano processors, making it possible to significantly reduce the development time, decrease size, and simplify application design. The power supply circuit of the BD71850MWV, designed specifically for the power supply system of the i.MX 8M Nano processor family, integrates an 6 buck converters, 6 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 Nano applications.

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Product Detail

Part Number | BD71850MWV-E2
Status | Recommended
Package | UQFN56BV7070
Unit Quantity | 1500
Minimum Package Quantity | 1500
Packing Type | Taping
RoHS | Yes






SW frequency(Max.)[MHz]




Operating Temperature (Min.)[°C]


Operating Temperature (Max.)[°C]



  • 6 Buck Regulators
  • 2.0 MHz Switching Frequency. (BUCK1, BUCK2, BUCK5, BUCK7, and BUCK8).
  • 1.5MHz Switching Frequency. (BUCK6)
  • Target Efficiency: 83% to 95%.
  • Output Current & Voltage.
    BUCK1: 3.0 A, 0.7 V to 1.3 V/10 mV step, DVS
    BUCK2: 3.0 A, 0.7 V to 1.3 V/10 mV step, DVS
    BUCK5: 3.0 A, 0.70 V to 1.35 V/8steps, DVS
    BUCK6: 3.0 A, 2.6 V to 3.3 V/100 mV step
    BUCK7: 1.5 A, 1.605 V to 1.995 V/8steps
    BUCK8: 3.0 A, 0.8 V to 1.4 V/10 mV step
  • 6ch Linear Regulators (6 LDOs)
  • LDO1: 10 mA, 3.0 V to 3.3 V, 1.6 V to 1.9 V
  • LDO2: 10 mA, 0.9 V, 0.8 V
  • LDO3: 300 mA, 1.8 V to 3.3 V
  • LDO4: 250 mA, 0.9 V to 1.8 V
  • LDO5: 300 mA, 0.8 V to 3.3 V
  • LDO6: 300 mA, 0.9 V to 1.8 V
  • Power Mux Switch
  • 1.8V Input: 500 mΩ(Max)
  • 3.3V Input: 500 mΩ(Max)
  • 32.768 kHz 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: 100 kHz/400 kHz, 1 MHz
  • 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

Design Resources



White Paper

  • ISO 26262: Functional Safety Standard for Modern Road Vehicles
  • Enhancing Efficiency By Reducing Converter Stages & RON In Power Management ICs

Application Note

  • BD71850MWV Platform Design Guide
  • BD71850MWV 1x22μF Buck Output Capacitor
  • BD71850MWV Frequently Asked Questions

Technical Articles

Schematic Design & Verification

  • Importance of Probe Calibration When Measuring Power: Deskew
  • Impedance Characteristics of Bypass Capacitor

Thermal Design

  • What Is Thermal Design
  • Method for Calculating Junction Temperature from Transient Thermal Resistance Data
  • Thermal Resistance



  • BD71850MWV Reference Schematic Data
  • BD71850MWV Reference BOM List
  • BD71850MWV Schematic Data
  • BD71850MWV Schematic Checklist


  • BD71850MWV Layout Data
  • BD71850MWV Layout Data (Both Surfaces Mount)
  • UQFN56BV7070 Footprint / Symbol

Packaging & Quality

Manufacturing Data

  • Factory Information

Environmental Data

  • REACH SVHC Non-use Declaration