The RAA211835 is a DC/DC asynchronous step-down (Buck) regulator that supports a 4.5V to 75V input voltage range and adjustable output voltage. It can deliver up to continuous 3A of continuous output current with premium load and line regulation performance.
The RAA211835 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 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 RAA211835 provides useful functions such as internal or programmable soft-start and power good indicator. For safe operation, the RAA211835 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.
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| Datasheet | PDF 3.80 MB | |
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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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The RTKA211835DE0000BU board demonstrates and quickly evaluates the RAA211835 (QFN version), a DC/DC asynchronous step-down regulator with programmable switching...
The RTKA211835DE0010BU board demonstrates and quickly evaluates the RAA211835 (HTSSOP version), a DC/DC asynchronous step-down regulator with programmable switching...
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.
| QFN | Reel | 3 | 1.968 | Get Samples, | |
RAA211835GSP#HA0 Active Samples Available
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TSSOP-EP | Reel | 3 | 1.968 | Get Samples, |
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.
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