DC/DC Converters Boast Best-In-Class EMI Performance

(Diodes Incorporated)

Diodes Incorporated’s AP63200/AP63201/AP63203/AP63205 2A synchronous dc/dc buck converters are said to deliver impressive EMI performance across a range of input and output voltages. The devices suit applications that include home appliances and industrial electronics, as well as telecommunications, power tools, office equipment and consumer products such as TVs and STBs.


The converters AP63200/AP63201/AP63203/AP63205 employ a frequency spread spectrum (FSS) technique with a switching frequency jitter of ±6%, and proprietary gate driver technology to enable what the company calls the industry’s best-in-class EMI performance. This design supports single layer layout and can remove the need for vias to further reduce EMI. Further improvements are achieved through the proprietary gate driver design, which reduces switching node ringing without sacrificing MOSFET turn-on and turn-off times.

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Other features include high-side and low-side MOSFETs with low on-resistance, RDS(ON), complemented by Diodes’ proprietary gate driver technology and compensation network. By employing pulse frequency modulation (PFM), the AP63200/AP63201/AP63203/AP63205 deliver efficiencies of up to 88% under light-load conditions (5 mA output current), and a quiescent current as low as 22 µA.


Other features include an input voltage range of between 3.8V to 32V, variable output voltages between 0.8V to VIN (AP63200/AP63201), or fixed output voltages of 3.3V (AP63203) or 5V (AP63205). All devices can deliver a maximum continuous output current of 2A. The AP63200/AP63201 devices can also operate as an LDO regulator by employing a duty cycle of 100%, providing a stable output voltage to within 1% of an unregulated input voltage. All the devices have been designed to withstand input voltage surges of up to 40V for 400ms.


All products are available in the TSOT26 package. For further information, visit Diodes.

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