Features
- AEC-Q100 qualified, Grade 1: -40°C to +125°C
- Supports ASIL C Systems
- VIN operating range from 4.0V to 42V
- VOUT = 5.0V or 3.3V (factory programmable)
- High-efficiency synchronous buck regulator with efficiency up to:
- 95%; VIN = 12V; VOUT = 5V; F = 440kHz
- 92%; VIN = 12V; VOUT = 5V; F = 2.2MHz
- 2% VOUT accuracy over temperature, load, line
- Factory programmable soft-start
- Soft-stop output discharge during disable
- RSTb output which doubles as Monitor fault or Buck Fault Indicator
- Fixed switching frequency: 2.2MHz or 440kHz
- Spread Spectrum Modulation (SSM), pseudo-random frequency and dwell time
- Enable/disable
- Frequency modulation ±1%, ±2%, ±3%,
- Upward/centered/downward modulation
- Boot UVLO
Description
The RAA271050 is an automotive grade (AEC Q-100 Grade 1, ASIL C) 4A synchronous step-down voltage regulator with integrated high-side and low-side MOSFETs. The output voltage of this buck regulator is fixed to either 5.0V/3.3V. With an input voltage range of 4.5V to 42V, it provides a high-efficiency solution for a variety of point-of-load applications. The RAA271050 works as a primary regulator and companion product with the RAA271000 system PMIC, whose target application is the R-Car V3H processor, where a high-performance complete power solution is required.
Parameters
| Attributes | Value |
|---|---|
| Topology [Rail 1] | Buck |
| Outputs (#) | 1 |
| Input Voltage (Min) [Rail 1] (V) | 4 |
| Input Voltage (Max) [Rail 1] (V) | 42 - 42 |
| Output Voltage (Min) [Rail 1] (V) | 3.3 |
| Output Voltage (Max) [Rail 1] (V) | 5 |
| Output Current (Max) [Rail 1] (A) | 4 |
| Switching Frequency Range (Typical) (kHz) | 2200 - 2200 |
| Control Type | Current Mode |
| Peak Efficiency (%) | 95 |
| SYNCH Capability | No |
| Qualification Level | Automotive |
| Temp. Range (°C) | -40 to +125°C |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| SCQFN | 4.0 x 4.0 x 0.90 | 22 | 0.5 |
Applications
- Automotive vision systems
- Automotive Light Detection and Ranging (LiDAR) systems
- Automotive Advanced Driver Assistance Systems (ADAS) systems
- Automotive Integrated Cockpit systems
- Ideal pre-regulator for the RAA271000 PMIC