Features
- ASIL D ISO 26262 development process
- VIN operating range from 4.0V to 42V
- Start range 4.5V to 42V
- Fixed switching frequency: 2.2MHz with optional pseudo-random spread spectrum
- Three synchronous bucks with internal compensation and one LDO
- Buck 1 output range: 2.8V to 5.05V, up to 1A
- Buck 2/3 output range: 0.85V to 3.3V, up to 1A
- LDO 4 output range: 2.7V to 3.4V, up to 300mA
- OTP UV/OV thresholds: ±4%, ±6%, ±8%, ±12%
- OTP power up/down sequence and delay
- Optional output discharge on Buck 2, Buck 3, and LDO 4
- Configurable GPIO pin
- Dual EN pins
- Protection features
- Input voltage UVLO
- Output OV/UV
- Overcurrent protection on internal and output LDOs
- Over-temperature shutdown
- Functional safety features
- Built-in Self Test (BIST) at power up
- Dual bandgap/Reference chains
- Independent UV/OV sense path for Buck 1 output
- Configurable Window Watchdog Timer (WWDT)
- Continuous CRC checking of OTP shadow registers
- CRC-protected I2C communication
- Configurable fault manager
- AEC-Q100 qualified, Grade 1: -40°C to +125°C (TJ = 150°C)
Description
The RAA271082 is a versatile multi-rail power IC comprised of a primary high voltage synchronous buck regulator, two secondary low voltage synchronous buck regulators, and an LDO regulator. It offers four overvoltage and undervoltage monitors, I2C communications, a general-purpose I/O pin, and a dedicated reset output/fault indicator. RAA271082 was designed using an ASIL D ISO 26262 development process and is intended to meet ASIL B device metrics. The RAA271082 includes a second bandgap reference for the OV/UV monitors, built-in self-test at power-up, independent OV/UV monitoring, and continuous CRC error checking on internal registers and I2C communications.
Requiring few external components and minimal board space, the RAA271082 provides a high-density power solution. 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 temperatures.
The RAA271082 is available in a 4mm x 4mm 24-lead Step Cut QFN (SCQFN) package with an exposed pad for improved thermal performance. It is AEC-Q100 qualified to Grade 1 and operates across an ambient temperature range of -40°C to 125°C and is electrically specified across a junction temperature range of -40°C to 150°C.
Parameters
| Attributes | Value |
|---|---|
| Qualification Level | Automotive |
| Product Type | MCU |
| Processor Supplier | Renesas |
| Processor Name | RH850 P1M |
| Total step-down DC/DC converter channels (#) | 4 |
| Step-up DC/DC converter Channels (#) | 0 |
| Input Voltage (Min) (V) | 4 |
| Input Voltage (Max) (V) | 42 |
| Bus Voltage (Max) (V) | 42 |
| Output Current Max (A) | 1 |
| Outputs (#) | 4 |
| Function | 4-ch PMIC |
| Comm. Interface | I2C |
| Battery Interface | No |
| GPIOs (#) | 1 |
| Integrated Battery Charger | No |
| Switching Frequency (MHz) | 2.2 - 2.2 |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| SCQFN | 4.0 x 4.0 x 0.90 | 24 | 0.5 |
Application Block Diagrams
 | Humanoid Battery Management System Integrated humanoid robot BMS enabling safe, real-time power management, protection, and battery-state control. |
 | 48V/3kW Motor Control for 2/3 Wheelers The 48V/3kW motor control system features a scalable inverter design, phase overcurrent fault detection, and ASIL-B safety. |
 | Cost-Effective Digital Cluster with 4-channel AHL and Surround View Digital clusters boost safety by centralizing info and reducing costs with AHL and efficient PMICs. |
 | Advanced Automotive Domain Controller (AADC) Advanced Automotive Domain Controller integrates key systems for smarter and connected vehicles. |
 | DC Fast Charging Station for Electric Vehicles DC fast charging station design with high‑efficiency IGBTs, gate drivers, an MCU, and PMIC. |
 | Automotive Camera System with AHL Control Channel Automotive AHL camera system with single-cable video transmission and control, plus I2C blower control. |
 | Video Output Expansion for Surround View & AR HUD Integrated video output and AI for surround view and AR HUD with reduced cost and complexity. |
Additional Applications
- Driver monitoring cameras
- Rear and surround view HD automotive cameras
- Microcontroller PMIC for battery management systems
- Microcontroller PMIC for zone and domain controllers
- Microcontroller PMIC for gateway units
Complete Your Design
Explore complementary products to elevate your design
Renesas Boards & Kits
Evaluation Board for RAA271082, 4-channel Automotive PMIC
The RTKA271082DE0000BU evaluates the performance of the RAA271082 Automotive PMIC with three synchronous buck regulators and one low dropout linear regulator. The evaluation board is intended for use in point-of-load automotive applications, including camera systems, with 4.5V to 42V input... Read More
RH850/U2C Starter Kits
The RH850/U2C Starter Kit is a compact platform for evaluating 32-bit RH850/U2C microcontrollers. Powered by two RH850G4KH cores at 320MHz, it delivers high-performance real-time processing for automotive applications.
The kit includes a 12V power supply with the ASIL-D-compliant RAA271082 PMIC... Read More
Support Communities
-
RAA271082 demo
Where can I find the demo routine for RAA271082?
Jul 5, 2024 -
RAA271082 Automotive PMIC
Hello , Is there any driver / sample code available for RAA271082 PMIC ? I searched but I could not find any. Thanks in advance
Feb 6, 2025 -
[RH850/F1KM]External voltage monitoring
Hello team In order to implement external voltage monitoring mentioned in the Safety Application Note, is there any recommended chip from Renesas? BR. Xianti
Mar 4, 2025
Support Communities
