Overview
Description
The RAA211803 is a tiny, easy-to-use, ultra-low quiescent current (IQ) buck regulator with a wide input voltage range of 7V to 80V and up to 300mA of output current with a fixed 3.3V output.
Available in a TSOT23-5 package, the device offers comprehensive protections, including VIN undervoltage lockout (UVLO), VOUT overvoltage protection (OVP), overcurrent protection, and over-temperature protection.
Features
- 7V to 80V input supply range
- Up to 300mA output current
- IQ = 5.5μA at 80V, at no load conditions, switching
- IQ = 4.5μA at 80V at no load and no switching conditions
- Fixed 3.3V VOUT
- Minimum on-time of 75ns
- Variable frequency operation, frequency programmed by external inductor (10μH to 33μH)
- Pre-bias, monotonic, and smooth start-up
- Protections
- Overcurrent (OC) limit
- Input undervoltage lockout (UVLO)
- Over-temperature protection (OTP)
- Output overvoltage protection (OVP)
- Accurate EN threshold
- Package: TSOT23-5 (2.9mm x 1.63mm)
Comparison
Applications
Documentation
Featured Documentation
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| Datasheet | PDF 4.35 MB | |
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Design & Development
Boards & Kits
Evaluation
RTKA211803DE0000BU
Active
3.3V Fixed Output Ultra-Low Quiescent Current Step-Down Regulator Evaluation Board
The RTKA211803DE0000BU evaluation board provides a simple platform for evaluating the RAA211803 ultra-low quiescent current (IQ) switching regulator in the TSOT23-5 package. The board operates from a supply voltage of 7V to 80VDC, delivering a continuous load up to 300mA at a 3.3V output voltage.
Recommended Documents:
Evaluation
RTKA211805DE0000BU
Active
5V Fixed Output Ultra-Low Quiescent Current Step-Down Regulator Evaluation Board
The RTKA211805DE0000BU evaluation board provides a simple platform for evaluating the RAA211805 ultra-low quiescent current (IQ) switching regulator in the TSOT23-5 package. The board operates from a supply voltage of 7V to 80VDC, delivering a continuous load up to 300mA at 5V output voltage.
Recommended Documents:
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
Portfolio of High Performance, Low Iq Buck Regulators for LDO Replacement
The RAA21140x and RAA21180x families of bucks are simple to use and cost-effective while offering more than 15x less power loss of similar output rating LDOs (depending on operating conditions) with ultra-low 4uA Iq at zero loading conditions, making it ideal for powering always-on standby housekeeping MCUs or sensors. These bucks are ideal for general LDO replacement in applications such as industrial & home automation, eMobility solutions, energy storage, cordless power tools, and appliances.
Video List
