CHL8225-03CRT

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The CHL8225-03CRT is an integrated DC-DC switching controller designed to provide a cost-effective, efficient and adjustable regulation of output voltage. It is widely used in automotive and industrial applications such as computers, servers, and telecom networks. The CHL8225-03CRT features a unique and highly efficient current-mode control topology with a wide voltage range, adjustable frequency and output voltage, and low power dissipation for reliable operation in demanding environments. The device is pin-compatible with LDO-style linear regulators, offering the flexibility and cost-savings associated with an integrated switching controller without sacrificing design flexibility.

The CHL8225-03CRT is comprised of an integrated circuit comprising a switching regulator, over-voltage protection, over-current protection, under-voltage protection, and output voltage adjust. The device allows programming of the output voltage to a wide range of voltages such as 1.8V, 2.5V, 3V and 3.3V +/-2%. Additionally, it provides advanced features such as voltage margining and dynamic on-off. The device is packaged in an 8-pin LLP package and is capable of operating at a wide range of frequencies up to 600 kHz.

The CHL8225-03CRT operates on a Pulse Width Modulated (PWM) voltage switch mode. Input voltage is regulated by a Pulse Width Modulated (PWM) controller which switches an inductor using a switching transistor. To drive the switch transistor, current mode control is used. This process produces a pulsed output which is then filtered to yield a regulated output voltage. The frequency of this output can be adjusted by a simple resistor network. The CHL8225-03CRT provides automatic mode detection, allowing it to start-up in PWM or PFM mode, and automatically switch modes depending on input conditions. In low-load conditions, the device operates in Power Factor Correction (PFC) mode, improving power efficiency by reducing ripple on the output voltage.

Advanced protection features integrated into the CHL8225-03CRT include output voltage and current protection, under-voltage lockout, temperature shut-down and a programmable soft start circuit. These features ensure reliable operation even in the most demanding environments.

In summary, the CHL8225-03CRT is an advanced and highly efficient DC-DC switching controller suitable for use in demanding automotive and industrial applications. Its highly efficient current-mode based topology combined with a wide range of input and output voltages and a range of advanced protection features make it an ideal choice for cost-effective and reliable voltage regulation.

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