CS51021AEDR16G

CS51021AEDR16G is a Voltage Regulator which is primarily used as a DC-to-DC switching controller for 15W applications. It is a feature-rich product that supports assisted start-up, Single-ended Primary-Inductor Converter (SEPIC) topology and dual-synchronous rectification, providing high power efficiency and improved power supply stability in a very small package.

Application field

This Voltage Regulator is suitable for applications that require up to 15W of power such as satellites, set-top boxes, industrial control, computing and consumer applications. It supports both isolated and non-isolated systems and is capable of supplying two output voltages, making it ideal for point-of-load conversion in applications where two power rails are needed.

The CS51021AEDR16G is able to regulate output voltages up to 19.5 V and offers a wide range of output current capability (8-600 mA). The output current range offers flexibility for applications such as graphics cards, disk drives and power-over-Ethernet (PoE) applications. The product also features a wide VIN range of 12.0V - 59.3V, allowing its use in a variety of modular power architecture systems where multiple power sources are available.

Working Principle

The CS51021AEDR16G uses a push-pull/dual-synchronous rectification control scheme and a single-ended primary-inductor converter (SEPIC) topology to achieve efficient power conversion. The device utilizes an intelligent switching architecture which is able to switch the output voltage in a very fast response time, assuring uninterrupted operation under dynamic load transitions.

The voltage regulator includes an internal switch transistor that provides improved efficiency and reduced external component count, as well as an adjustable current limit to ensure over current protection. The device also includes a soft-start/assist circuit and supports external synchronization, allowing the controller to be used in multi-phase and high-frequency applications. The CS51021AEDR16G is supplied in a very small 10-lead package (2.1 mm x 3.1 mm) and requires only two external components, making it ideal for space-constrained designs.