Overview
Description
The RAA211230 is an integrated 24V, 3A synchronous buck regulator with current mode constant on-time (COT) control. The RAA211230 features comprehensive protection including input undervoltage lockout (UVLO), overcurrent protection (OCP), output undervoltage protection (OUVP), and over-temperature protection (OTP).
Features
- 4.5V to 24V input supply range
- Up to 3A output current
- Integrated high-side (85mΩ) and low-side (45mΩ) MOSFETs
- 400μA quiescent current
- Minimum on-time of 60ns and minimum off-time of 275ns
- 0.765V reference voltage with 2% accuracy
- PFM mode under light load condition
- Current mode constant on-time (COT) control with internal compensation
- Internal 0.8ms soft start time
- Protection: low-side overcurrent (LSOC) limit, input undervoltage lockout (UVLO), over-temperature protection (OTP), output undervoltage protection (OUVP) with Hiccup mode
- Accurate EN threshold
- 6-lead TSOT23 package
Comparison
Applications
Documentation
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Type | Title | Date |
Datasheet | PDF 3.97 MB | |
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Design & Development
Software & Tools
Software & Tools
Software title
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Software type
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Company
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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.
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Simulator | Renesas |
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Boards & Kits
RAA211230 Synchronous Buck Evaluation Board with 4.5V to 24V Input Range, 3.3V 3A Output (TSOT23-6 version)
The RTKA211230DE0020BU board evaluates the RAA211230, a DC/DC synchronous step-down regulator with current mode Constant On Time (COT) control. The RAA211230 supports a wide input voltage range (from 4.5V to 24V) and adjustable output voltage. It delivers up to continuous 3A output current.
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.

Product Options
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Videos & Training
Renesas’ RAA211230/320 family of synchronous buck regulators are integrated with current mode constant on-time (COT) control which enables fast transient response while shrinking the output filter size. Visit renesas.com/cot-regulators to learn more about how these high performance, compact and pin-compatible COT regulators will make designing your power supply easy!