Renesas Unveils R2A20101 Synchronous Rectification DC-DC Converter

Renesas Technology America, Inc. today announced the R2A20101 synchronous-rectifier type DC-DC converter, a fast-response power supply device for mobile phones, other digital consumer electronics products, and battery powered handheld devices. In a typical application, the power-converter IC is located right next to the load it is driving: typically a microcontroller, logic device, memory chips, etc. It performs step-down conversion of the voltage from a battery or other DC source to the stable lower power supply voltage that its load requires. By itself, the R2A20101 delivers up to 650mA of output current. However, an on-chip parallel-operation function allows even larger output currents.

Suitable for low-voltage, large-current applications, the R2A20101 DC-DC converter produces an output voltage change in response to a load fluctuation (a wireless message transmission, etc.) in only five microseconds. This is at least 50-percent quicker than previous devices. To achieve this fast load transient response, the device uses a new current-feedback method for output voltage control, helping to ensure reliable system operation.

The DC-DC converter is simple to use. No external parts are required, just connections only to the VIN, GND, EAO (Error Amp. Out) and output pins. The device has a power supply voltage range of 2.5V to 5.5V and operates at PWM switching frequencies as high as 2MHz. It achieves 92-percent power conversion efficiency with a 2.5V input and 1.8V output.

The R2A20101 converter includes a voltage-tracking function and supports the execution of various kinds of sequence control. It is available in a small (4mm x 4mm x 0.8mm) QFN-24 low-thermal-resistance package, as well as an ultra-small (1.96mm x 1.26mm x 0.48mm) CSP-15 package.

Pricing and Availability
R2A20101NP – QFN-24: $1.5/Now
R2A20101BM – CSP-15: $1.5/Now

About Renesas Technology Corp.
Renesas Technology Corp. is one of the world’s leading semiconductor system solutions providers for mobile, automotive and PC/AV (Audio Visual) markets and the world’s No.1 supplier of microcontrollers. It is also a leading provider of LCD Driver ICs, Smart Card microcontrollers, RF-ICs, High Power Amplifiers, Mixed Signal ICs, System-on-Chip (SoC), System-in-Package (SiP) and more. Established in 2003 as a joint venture between Hitachi, Ltd. (TOKYO:6501)(NYSE:HIT) and Mitsubishi Electric Corporation (TOKYO:6503), Renesas Technology achieved consolidated revenue of 906 billion JPY in FY2005 (end of March 2006). Renesas Technology is based in Tokyo, Japan and has a global network of manufacturing, design and sales operations in around 20 countries with about 26,200 employees worldwide.

Renesas Technology R2A20101 synchronous-rectifier type DC-DC converter:

  • Power supply voltage: 2.5V to 5.5V
  • Output current: 650mA, max.
  • Operating frequency: 2MHz, max.
  • Packages: QFN-24, CSP-15