CPC5603CTR Discrete Semiconductor Products

The CPC5603CTR is a wide-range current mirror circuit mainly designed for use in battery-powered portable devices. It is a direct replacement for the conventional current mirrors and dynamic loads used in almost any low-power application. It is designed to provide an accurate reference current source over a wide range of load conditions and supply voltages. Additionally, the CPC5603CTR offers improved reliability and long-term operation stability.

The CPC5603CTR consists of two field-effect transistors (FETs) of opposite polarity connected in parallel. These two FETs are referred to as the transistor gate and the drain gate, and they act as two independent current sources. The gate of the first FET, the drain gate, is connected to the source of the second FET, the gate. This arrangement creates a two-stage current mirror. The current through the drain gate is divided between the two FETs, resulting in a current mirroring effect.

The CPC5603CTR has several important features. First, it is designed to supply currents up to 400mA across a wide range of temperatures, maintaining a typical temperature coefficient of less than 0.1%. Secondly, its high current drive capability makes it suitable for use in low-noise applications, as it exhibits low-noise characteristics, capable of rejecting noisy signals. Lastly, due to its long-term stability, the CPC5603CTR is well adapted for use in non-volatile memory devices.

The CPC5603CTR can be used in a variety of applications. For example, it can be used in battery-powered portable applications to drive LEDs, convertors, and other low-power devices. It can also be used in circuits such as parallel clock repeaters for memory devices, and serve as a current base for clock buffers and power supply decoupling. Additionally, it can be applied to high-power audio amplifiers for improved performance.

The working principle of the CPC5603CTR is simple. It works by creating an electric potential difference between the gate and the source of the two FETs. This potential difference helps to create an electromotive force that pushes current from the gate to the source. This process is referred to as “source-follower biasing”, and it helps to maintain a consistent output current over a wide range of load and temperature conditions. The current mirroring effect is then used to amplify the current delivered to the load.

In conclusion, the CPC5603CTR is a versatile wide-range current mirror circuit primarily designed for use in battery-powered portable devices. It is capable of providing currents up to 400mA with extremely low temperature coefficients and excellent noise rejection characteristics. Its simple two-FET design and current mirroring effect make it ideal for use in a wide range of low-power applications, including memory repeaters, LED drivers, and high-power audio amplifiers.