New Product Introduction

Rohm BD71837MWV

BD71837MWV - programmable PMIC for powering single, dual and quad-core SoC’s such as NXP-i.MX 8M

Rohm BD71837MWV chip image

The BD71837MWV is optimized for low BOM cost and compact solution footprint. It integrates 8 Buck regulators and 7 LDO’s to provide all the power rails required by the i.MX 8M SoC and the commonly used peripherals. The PMIC is one out of three power management solutions from ROHM for the i.MX 8 platform, which is suited for applications like wireless sound bars, streaming media boxes and dongles, industrial HMI and more.

QFN package and pinout support low cost Type 3 (non-HDI) PCB. Programmable power sequencing and output voltages, flexible power state control for easier system design and supports a wide variety of processors and system implementations.

 

Features

  • 8 buck regulators
    • 2.0 MHz switching frequency.
      (BUCK1, BUCK2, BUCK3, BUCK4, BUCK5, BUCK7, and BUCK8).
    • 1.5MHz switching frequency. (BUCK6)
    • Target efficiency: 83% to 95%.
    • Output current & voltage.
      • BUCK1: 3.6 A, 0.7 V to 1.3 V/10 mV step, DVS
      • BUCK2: 4.0 A, 0.7 V to 1.3 V/10 mV step, DVS
      • BUCK3: 2.1 A, 0.7 V to 1.3 V/10 mV step, DVS
      • BUCK4: 1.0 A, 0.7 V to 1.3 V/10 mV step, DVS
      • BUCK5: 2.5 A, 0.70 V to 1.35 V/8steps
      • BUCK6: 3.0 A, 3.0 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
  • 7ch linear regulators(7 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, 1.8 V to 3.3 V
    • LDO6: 300 mA, 0.9 V to 1.8 V
    • LDO7: 150 mA, 1.8 V to 3.3 V
  • Power mux switch
    • 1.8V input: 200 mΩ(Max)
    • 3.3V input: 280 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

 

Applications

 

  • Streaming media boxes and dongles
  • AV receivers and wireless sound bars
  • Industrial HMI, SBC, IPC and panel computer
     

Block diagram

Rohm BD71837MWV block diagram: alignment fo Buck regulatures, linear regulator, switches

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