Integrated FET 30V, 5A Synchronous Buck Regulator with Internal Compensation and Programmable Frequency
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Overview
Description
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.
Features
- 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
Applications
- Up to 30V distributed power supplies & general purposes POL
- Telecommunication base station power supplies
- Power tools
- Surveillance
- Portable mobility devices
- Industrial power systems
Design & Development
Software & Tools
Software & Tools
| iSim:PE Offline Simulation TooliSim 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: | Simulator | Renesas |
Boards & Kits
Boards & Kits
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:
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:
Models
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.
Product Options
Processing table
| QFN | Reel | 6000 | Get Samples, | |
| TSSOP-EP | Reel | 2500 | Get Samples, |
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play_circle_filledVideos & 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
News & Blog Posts
| The Evolution of Power Enhances Our Daily Lives | Blog Post | May 8, 2023 |
