Diodes Incorporated has introduced the AP63200 series of 2A synchronous DC-DC buck converters, which provide class-leading EMI performance across a range of input and output voltages.
The converters use a Frequency Spread Spectrum (FSS) technique and proprietary gate-driver technology to reduce the device’s electromagnetic emissions. This design supports single-layer board layouts, and can eliminate the need for vias, which are sometimes required in board designs to reduce EMI.
The fully integrated devices feature high- and low-side MOSFETs with very low on-resistance. Employing Pulse Frequency Modulation (PFM), the AP63200 series converters offer high efficiency of up to 88% under light-load conditions, at an output current of 5mA. Quiescent current is as low as 22μA.
The AP63200 series devices operate over a wide input-voltage range of 3.8V to 32V.
Two parts, the AP63200 and AP63201, provide a variable output voltage of between 0.8V and the input voltage. The AP63203 supplies a fixed 3.3V output. The fixed output of the AP63205 is 5V. All devices can supply 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.
AP63200 series: 88% efficiency in light-load conditions