Renesas RAA271082 Automotive PMIC
Renesas RAA271082 Automotive PMIC
Renesas RAA271082 Automotive PMIC is an adaptive multi-rail power IC that includes a primary side high voltage synchronous buck regulator, two secondary side low voltage synchronous buck regulators, and an LDO regulator. The Renesas RAA271082 features four overvoltage and undervoltage monitors, I2C communication, one general-purpose I/O pin, and a dedicated reset output/fault indicator.
The Renesas RAA271082 Automotive Grade PMIC demonstrates the ASIL-D ISO-26262 development flow and is designed to meet ASIL-B device specifications. The RAA271082 includes a second bandgap reference for OV/UV monitor, built-in self-test at power-up, independent OV/UV monitoring, and continuous CRC error checking on internal registers and I2C communication.
The device provides a high-density power solution requiring few external components and minimal board space. The PMIC has various features and is configured using an internal one-time programmable memory. Nearly all device options are configured internally and can be selected without external components. The regulator also provides internal compensation. This step-down regulator performs high efficiency synchronously and can operate in harsh environments where high ambient temperatures are required.
The Renesas RAA271082 is available in a 24-pin Step Cut QFN (SCQFN) package with an exposed pad for improved thermal performance. The device is AEC-Q100 Grade 1 qualified over the ambient temperature range of -40°C to 125°C, and is electrically rated for the junction temperature range of -40°C to 150°C.
characteristic
ASIL-D ISO26262 development process
VIN working voltage range: 4.0V--42V
Startup Range: 4.5V to 42V
Fixed Switching Frequency: 2.2MHz, Optional Pseudo-Random Spread Spectrum
Three Synchronous Buck Regulators and an LDO
Buck1 output range: 2.8V to 5.05V, up to 1A
Buck2/3 output range: 0.85V to 3.3V, up to 1A
LDO4 output range: 2.7V to 3.4V, up to 300mA
OTP UV/OV threshold: ±4%, ±6%, ±8%, ±12%
OTP power-up/power-down sequences and delays
Optional Output Discharge on Buck 2, Buck 3, and LDO4
Configurable GPIO pins
Dual EN pins
protective properties
Input voltage UVLO
Output OV/UV
Overcurrent Protection on Internal and Output LDO
thermal shutdown
Functional Safety Features
Built-in self-test (BIST) at power-up
Dual Gap/Reference Chain
Independent UV/OV detection path for Buck1 output
Configurable Windowed Watchdog Timer (WWDT)
Continuous CRC checking of OTP shadow registers
CRC protected I2C communication
Configurable Fault Manager
AEC-Q100 Grade 1 Qualified, Temperature Range: -40°C to +125°C (TJ = 150°C)
application
driver monitoring camera
Car Rear View and Surround View HD Camera
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