ROHM's compact Schottky barrier diodes feature the industry's lowest VF and high current handling capability
ROHM has recently announced the development of the RBE series of compact Schottky barrier diodes featuring the lowest VF in the industry, making it ideal for portable applications requiring greater space savings. Available in a range of packages, including the new ultra-compact VML2 measuring just 1.0 x 0.6mm optimised for high-density applications.
The growing trend towards greater functionality and sophistication in mobile devices while reducing size and maintaining or even prolonging battery life has led to a greater demand for ultra-compact components that minimise power consumption, in particular Schottky barrier diodes used in power supplies, where low VF and high average rectified current are required. However, up to now in order to reduce VF and increase current handling capability it has been necessary to increase chip size, making miniaturisation difficult.
In response, ROHM significantly improved current efficiency by redesigning the diode element, decreasing VF by 32% over conventional products. This results in lower heat generation and higher rated current, enabling smaller packages to be used, which can reduce mounting area by up to 80%.
Key Features
1. High current in a compact package
Industry-low VF ensures high current handling capability in a compact form factor.
| Package (Size) | RBE Series | Conventional |
| VML2 (1006) |  | 0.2A |
| EMD2 (1608) | | 0.2A |
| UMD2 (2512) |  | 0.5A |
| TUMD2 (2513) |  | 1.5A |
| *Comparison at VR=20V |
2. Reduced mounting area by up to 80%
Higher rated current makes it possible to use smaller packages, reducing mounting area considerably.
Application Diagram: Smartphone Circuit
Specifications
| (Ta=25°C) |
| Package | Part No. | Absolute Maximum Ratings | Electrical Characteristics |
| Vr (V) | Io (A) | Vf (V) | | Ir (mA) | |
| VML2 | RBE05AS20A | 20 | 0.5 | 0.53 | | 0.15 | |
| EMD2 | RBE05SM20A | 20 | 0.5 | 0.53 | | 0.15 | |
| UMD2 | RBE05VM20A | 20 | 0.5 | 0.43 | | 0.2 | |
| RBE07V20A | 20 | 0.7 | 0.43 | | 0.2 | |
| TUMD5 | RBE1KA20A | 20 | 1* | 0.43 | | 0.2 | |
| TUMD2 | RBE1VA20A | 20 | 1 | 0.53 | | 0.2 | |
| RBE2VA20A | 20 | 2 | 0.46 | | 0.7 | |
| TSMD5 | RBE2EA20A | 20 | 2* | 0.39 | | 0.7 | |
| *1/2 lo per element |
- VF ( Forward Voltage)
The amount of voltage when current is flowing through the diode in the forward direction. The smaller the value the lower the power consumption. - Average rectified current(Io)
The maximum rectified current that can flow in the forward direction under the specified conditions.
For more information, or details on the full range of Rohm products available from Anglia, please email info@anglia.com
Back to product news
This news article was originally published in October 2013.
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