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BD71847AMWV for Mini, BD71850MWV for Nano 1

This slide shows a little more detail about the PMIC devices that support the i.MX 8M Mini and Nano devices. Specifically, the BD71847AMWV for the Mini and the BD71850MWV for the Nano. As mentioned before, for an inexpensive solution, this device can work on a 4-layer PCB. Running this solution requires a footprint of about 325mm2. This device contains 6 buck converters that can operate at 1.5 or 2 MHz switching frequencies with a +/- 1.5% accuracy. There are two rails that include dynamic voltage scaling (or DVS) which allow for 10 mV step capability for precise power control. Additionally, these regulators can work in either PWM, PFM, or AUTO mode depending on power control load required or expected. Finally, these rails also include a configurable phase offset capability per rail. Another notable feature of this PMIC is the OTP configurability for power sequencing and default output voltages. This is what allows the PMIC to be used with other system applications like FPGAs and other applications processors. The overall system PMIC has very low power consumption for battery powered application as well with numbers like 12 µA in an OFF state, 20 µA in the SNVS state, and 126 µA in the suspend state.

PTM Published on: 2020-07-10