Overview

The RAA211250 is a DC/DC synchronous step-down (Buck) regulator that supports a 4.5V to 30V input voltage range and adjustable output voltage. It can deliver up to continuous 5A of continuous output current with premium load and line regulation performance.

The RAA211250 uses peak-current mode control architecture. Its PWM switching frequency is programmable to provide the best trade-off between transient response and efficiency. It also supports PFM operation and DEM to maximize light load efficiency, in addition to an external bias LDO input to further reduce power dissipation across the load range. The regulator also has an internal loop compensation circuit to reduce the external component count and BOM cost.

The RAA211250 provides useful functions such as internal or programmable soft-start and power good indicator. For safe operation, the RAA211250 also offers protection features such as cycle-by-cycle peak and valley current limit, input voltage UVLO, output voltage undervoltage (short-circuit) protection, and thermal shutdown.

RAA211250 Block Diagram
RAA211250 Typical Application Circuit
RAA211250 20 Ld QFN Pin Assignment
RAA211250 16 Ld HTSSOP Pin Assignment
RAA211250 Block Diagram
RAA211250 Typical Application Circuit
RAA211250 20 Ld QFN Pin Assignment
RAA211250 16 Ld HTSSOP Pin Assignment
  • Wide Vin operating range from 4.5V to 30V
  • Adjustable Vout from 0.8V to ~90% of Vin
  • Up to 5A of continuous output current
  • Default 400kHz or adjustable switching frequency from 200kHz to 800kHz
  • ±1% load regulation accuracy from -40°C to 125°C, ±0.5% load regulation accuracy at 25°C
  • 95μA typical quiescent current
  • Internal compensation, fixed 0.5ms SS for QFN and adjustable SS for HTSSOP
  • PFM operation and DEM at light load with integrated external bias LDO & Power Good indicator
  • Cycle-by-cycle peak and valley current limit, input voltage UVLO, output voltage undervoltage (short-circuit) protection and thermal shut down

Applications

  • Up to 30V distributed power supplies & general purposes POL
  • Telecommunication base station power supplies
  • Power tools
  • Surveillance
  • Portable mobility devices
  • Industrial power systems

Documentation

= Featured Documentation
Type Title Date
Datasheet
RAA211250 Datasheet
PDF 3.10 MB
1 item

Design & Development

Software & Tools
iSim:PE Offline Simulation Tool
iSim Personal Edition (iSim:PE) speeds the design cycle and reduces risk early in any project, identifying parts that can be used in current as well as next-generation designs.
Downloads
RAA211250 iSim:PE Model
 Simulator Renesas
1 item

Software Downloads
Type Title Date
Software & Tools - Other
RAA211630 Family Design Tool
Log in to Download XLSX 312 KB
1 item
RTKA211250DE0000BU

RTKA211250DE0000BU

Evaluation
Learn More

RAA211250 Synchronous Buck Evaluation Board with 4.5V to 30V Input Range, 3.3V 5A Output (QFN version)

The RTKA211250DE0000BU board evaluates the RAA211250 (QFN version), a DC/DC synchronous step-down regulator with programmable switching frequency. The RAA211250...

Featured Documents:
RTKA211250DE0000BU Evaluation Board Manual
RTKA211250DE0010BU

RTKA211250DE0010BU

Evaluation
Learn More

RAA211250 Synchronous Buck Evaluation Board with 4.5V to 30V Input Range, 3.3V 5A Output (HTSSOP version)

The RTKA211250DE0010BU board evaluates the RAA211250 (HTSSOP version), a DC/DC synchronous step-down regulator with programmable switching frequency. The RAA211250...

Featured Documents:
RTKA211250DE0010BU Evaluation Board Manual
Flexible MCU-based 6-Channel Power Sequencer Reference Design Board

EU096-PWRSEQPOCZ

Development
Learn More

Flexible MCU-based 6-Channel Power Sequencer Development Kit

The Flexible 6-Channel Power Sequencer is based on Renesas' general-purpose RL78/G12 microcontroller and six discrete DC/DC regulators with integrated power MOSFETs....

Featured Documents:
Flexible MCU-based 6-Channel Power Sequencer Hardware Design Guide
Available on Lab on the Cloud
Use our PC-based GUI to instantly start configuring and testing designs in our virtual lab, no physical board needed.
Launch Lab on the Cloud
RZ/V2H Evaluation Kit

RZ/V2H-EVK

Evaluation
Learn More

RZ/V2H Quad-core Vision AI MPU Evaluation Kit

The RZ/V2H AI MPU evaluation kit (RTK0EF0168C04000BJ) is used to evaluate Renesas' RZ/V2H quad-core vision AI MPU. The kit includes a CPU board and an expansion (EXP)...

Featured Documents:
RZ/V2H Evaluation Board Kit (Secure Type) Hardware Manual

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

Explore ECAD Models
Diagram of ECAD Models

Product Options

    Processing table
    PLP
    Pkg. Type
    Carrier Type
    Moisture Sensitivity Level (MSL)
    Price (USD) | 1ku
    Buy / Sample
    Part Number
    RAA211250GNP#HA0
    circleActive
    memory
    view_in_ar
    Samples Available
    Buy Now
    		2033 Dec QFN Reel 3 1.249 Get Samples,
    RAA211250GSP#HA0
    circleActive
    memory
    spa
    view_in_ar
    Samples Available
    Buy Now
    		2033 Dec TSSOP-EP Reel 3 1.249 Get Samples,
    Parametric Table tips

    Tips for Using This Parametric Table:

    • Hide Filters button in header: Collapse or expands filters
    • Column sort buttons in header: Sort Column alphabetically / numerically descending or ascending
    • Reset button in header: Reset all filters to the page default
    • Full Screen button in header: Expand the table to full screen view (user must close out of full screen before they can interact with rest of page)
    • Export button in header: Export the filtered results of the table to an Excel document
    • Filter parts search bar in header: Type to filter table results by part number
    • Hide column button in column headers: Select to hide columns in table
    • AND / OR toggle switches in header: Toggles the logic of this particular filter to be “AND” or “OR” logic for filtering results
    • Multiselect checkboxes at beginning of each row in table: Select these checkboxes to compare products against each other
    • Document icon next to product name in row: View the featured document for this product
    • Chip icon next to the right of the document icon in row: View the block diagram for this product
    • Cart icon to the right of the chip icon: Indicates that samples are available for this product

    Videos & Training

    Portfolio of 30V-75V Bucks Power the Highest-Precision Loads with Excellent Accuracy

    The RAA211x family of bucks are highly scalable due to its unique pin-compatible wide Vin buck variants with integrated FETs that support up to 5A of continuous output current with premium load and line regulation performance. The RAA211835 supports 75V async buck operation of 3A loadings, while RAA211250/450/630/820 support sync buck operation of 30V 5A, 40V 5A, 60V 3A, 75V 2A respectively.

    Video List
    Portfolio of 30V-75V Bucks Power the Highest-Precision Loads with Excellent Accuracy

    News & Blog Posts

    Blog Post May 8, 2023