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PMIC Simplifies Car Camera Power Supply Designs

Renesas Electronics has announced the ISL78083, a highly
integrated power management IC (PMIC) that simplifies power supply design for
use in multiple HD camera modules, reducing development cycles, bill of
materials (BOM) cost and supply chain risks. The automotive camera PMIC accepts
direct-from-battery (36-42V) or power-over-coax (15-18V) supply sources and
supports output currents up to 750mA per output. This power level offers ample
headroom for existing image sensors up to 7-megapixel and future sensors with
even higher resolution.

The feature-rich 4-channel ISL78083 automotive camera
PMIC includes a primary high-voltage synchronous buck regulator, two secondary
low-voltage synchronous buck regulators, and a low-dropout (LDO) voltage
regulator. With integrated feedback and integrated compensation, all that is
left to complete the high efficiency power supply is the output inductor and
capacitors.

The ISL78083 minimizes BOM cost, requiring 7-10 less
external components compared to competing solutions. The ISL78083 also features
four overvoltage (OV) and four undervoltage (UV) monitors, three power-good
indicators and a reset output/fault indicator. A second reference is supplied
for the OV/UV monitors.

Key features:

  • Input voltage of 4V to 42V supports
    power-over-coax or direct from a 12V battery power source
  • Three buck regulators provide programmable
    output ranges from 1V to 5.05V, and the LDO supports 2.8V to 3.4V
  • 2.2MHz switching frequency avoids AM band
    interference and shrinks the required output capacitance and inductance
  • An optional spread spectrum feature addresses
    EMC/EMI interference challenges
  • Wettable flank package improves reliability of
    solder connections and enables optical inspection of solder joints for lower
    cost manufacturing
  • AEC-Q100 Grade-1 qualified for ambient operation
    from -40°C to +125°C, and junction temperature from -40°C to +150°C

Mass production quantities of the ISL78083 automotive
camera PMIC are available now in a 4mm x 4mm, 24-lead SCQFN wettable flank
package.

Renesas Electronics | www.renesas.com

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PMIC Simplifies Car Camera Power Supply Designs

by Circuit Cellar Staff time to read: 1 min