ROHM Semiconductor BD71847AMWV Programmable Power Management IC

ROHM Semiconductor BD71847AMWV Programmable Power Management IC (PMIC) is ideal for powering single-core, dual-core, and quad-core SoCs. ROHM BD71847AMWV is optimized explicitly for the NXP Semiconductors i.MX 8M Mini processors, integrating all power rails required by the processor and its system peripherals. This optimization makes it possible to significantly reduce the development time and simplify application design.

The power supply circuit of the BD71847AMWV integrates 6 buck converters, 6 Low Dropout Regulators (LDOs), and control logic that allows it to supply power to both the processor and the required DDR memory. 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.

The BD71847AMWV PMIC is offered in a compact 7mm x 7mm 56-pin QFN (Quad Flat No-lead) package, with a pin layout that is carefully designed to ensure easy connection to the NXP i.MX 8M Mini processor and DDR memory, reducing design load and PCB area considerably.

Features

  • 6 Buck Regulators
    • 2.0MHz Switching Frequency (BUCK1, BUCK2, BUCK5, BUCK7, and BUCK8)
    • 1.5MHz Switching Frequency (BUCK6)
  • 6ch Linear Regulators (6 LDOs)
  • Power Mux Switch
    • 1.8V/3.3V Input: 500mΩ (Maximum)
  • 32.768kHz Crystal Oscillator Driver
  • Power Button Detector
  • Protection and Monitoring: Soft Start, Power Rails Fault Detection, UVLO, OVP, 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/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

Applications

  • Applications based on NXP Semiconductors i.MX 8M Mini Processors
  • Streaming media boxes and dongles
  • A/V receivers
  • Wireless sound bars
  • Industrial Human Machine Interfaces (HMI)
  • Single Board Computers (SBC)
  • Industrial PCs
  • Panel computers

Specifications

  • Input voltage range (VSYS): 2.7V to 5.5V
  • SNVS state current: 30μA (Typical)
  • SUSPEND state current: 126μA (Typical)
  • IDLE state current: 147μA (Typical)
  • RUN state current: 147μA (Typical)
  • Operating temperature range: -40°C to +85°C
  • Maximum junction temperature (Tjmax): +150°C
  • Package: UQFN56BV7070
  • Package dimensions: 7.00mm x 7.00mm x 1.00mm 
  • RoHS compliant

Videos

System Power Map

Block Diagram - ROHM Semiconductor BD71847AMWV Programmable Power Management IC
Published: 2019-04-04 | Updated: 2024-02-07