CS5253−1

This new very low dropout linear regulator reduces total power dissipation in the application. To achieve very low dropout, the internal pass transistor is powered separately from the control circuitry. Furthermore, with the control and power inputs tied together, this device can be used in single supply configuration and still offer a better dropout voltage than conventional PNP − NPN based LDO regulators. In this mode CS5253−1 the dropout is determined by the minimum control voltage.

The CS5253−1 is offered in a five−terminal D²PAK−5 package, which allows for the implementation of a remote−sense pin permitting very accurate regulation of output voltage directly at the load, where it counts, rather than at the regulator. This remote sensing feature virtually eliminates output voltage variations due to load changes and resistive voltage drops. Typical load regulation measured at the sense pin is less than 1.0 mV for an output voltage of 2.5 V with a load step of 10 mA to 3.0 A.

The CS5253−1 has a very fast transient loop response which can be
adjusted using a small capacitor on the Adjust pin.

Internal protection circuitry provides for "bust−proof" operation, similar to three−terminal regulators. This circuitry, which includes overcurrent, short circuit, and over−temperature protection will self protect the regulator under all fault conditions.

The CS5253−1 is ideal for generating a 2.5 V supply to power graphics controllers used on VGA cards.