Overview
Description
The RAA223021 is a universal input AC/DC switching buck regulator with ultra-low standby power that features a 700V integrated MOSFET capable of delivering up to 12W output power. It supports output voltage as low as 5V.
The RAA223021 combines constant off-time control for heavy load and Pulse Frequency Modulation (PFM) for light-load operation. Constant off-time controls switching frequency above the audible frequency around 43kHz. PFM eliminates any potential audible noises while offering superior light-load efficiency and ultra low power consumption (<20mW at no load). The efficiency is achieved up to 80%. The built-in frequency dithering further reduces EMI noise spectrum.
The RAA223021 also features input brownout protection that prevents input circuitry from the overcurrent at low input voltage, and hiccup protections for output fault conditions such as short-circuit, overload, overvoltage, and open feedback.
The RAA223021 is available in a small 7 Ld SOIC package.
Features
- Ultra-low standby power (<20mW)
- No audible noise
- Low quiescent current (<80μA)
- Output voltage as low as 3.3V
- Low EMI with frequency dithering
- 7 Ld SOIC package
- Programmable PFM allows optimization of COUT for various standby power requirements
- Protection features: Short-Circuit Protection (SCP), Overload Protection (OLP), Overvoltage Protection (OVP), open feedback protection, and Over-Temperature Protection (OTP).
Comparison
Applications
Documentation
Featured Documentation
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| Type | Title | Date |
| Datasheet | PDF 877 KB | |
| Other | XLSX 982 KB | |
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Design & Development
Software & Tools
Boards & Kits
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.
Support
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Support Communities
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RAA223021 Maximum possible duty cycle
Hello Team, I want to use RAA223021 buck converter to convert Input voltage of 16.8V to 154V DC to 12V DC. Is it possible to use via this buck converter. also how shall i calculate maximum possible duty cycle to calculate output voltage ? Thank you. BR, Vaibhav
Mar 19, 2025
Videos & Training
The innovative RAA2230xx family of 700V non-isolated AC/DC buck regulators delivers ultra-low-power consumption, excellent noise and EMI suppression, as well as reduced overall system cost for a wide range of applications, including home appliances, sensing systems, white goods, power meters and industrial controls.