Renesas Electronics announced that the ISL78083, a highly integrated power management IC (PMIC) 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 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.
The ISL78083 automotive camera PMIC offers an 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; and 2.2MHz switching frequency avoids AM band interference and shrinks the required output capacitance and inductance.
It also includes 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; and AEC-Q100 grade-1 qualified for ambient operation from -40°C to +125°C, and junction temperature from -40°C to +150°C.
The ISL78083 is intended for high-density power applications, requiring few external components and minimal board space. It offers an extensive feature set configured using internal One-Time Programmable (OTP) memory.
Nearly all device options, such as each output voltage selection, power sequencing, and OV/UV thresholds are internally configured and require no external components for selection. The regulators also offer internal compensation. The bucks are synchronous to achieve high efficiency and are capable of operating in harsh environments requiring high ambient temperature.
“The innovative ISL78083 PMIC expands Renesas’ support for automotive surround view camera systems beyond the image processing capabilities of the R-Car SoC and into the design of the HD satellite cameras,” said Niall Lyne, senior director for the automotive business unit at Renesas. “Cameras designed with the ISL78083 are smaller and can be conveniently mounted in vehicle locations that provide the desired surround view camera angles without negatively impacting style or aerodynamics.”
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.
Mass production quantities of the ISL78083 automotive camera PMIC are available now in a 4mm x 4mm, 24-lead SCQFN wettable flank package.