Automotive 4-Output Display Power Solution

The MAX25540 is a 4-channel power-management IC designed to accommodate the main rails used in modern automotive TFT displays. The IC supports the power requirement of GMSL parts. The MAX25540 and the MAX25530 TFT power supply and LED backlight driver combine to provide a two-chip solution to automotive display power supply requirements.

The MAX25540 integrates a high-voltage buck converter that transforms battery voltages into a 3.3V intermediate rail. In addition, a high-voltage, always-on, low-quiescent-current linear regulator supplies power at 3.3V.

The low-voltage section consists of a fully-integrated DC/DC converter and an LDO running off the intermediate rail. The low-voltage DC/DC converter provides 1V, while the LDO produces 1.8V.

A single START control pin initiates the start-up sequence, thereby simplifying device control. The MAX25540's external pMOSFET control block allows battery voltage to be switched to a downstream device, such as a backlight boost converter.

The MAX25540 is available in a TQFN package and operates in the -40°C to 105°C temperature range.

Applications

* Central Information Displays * Infotainment Displays * Instrument Clusters

* High Integration

* Complete Display Power Solution from Automotive Battery

* One High-Voltage 2.1A Buck Converter (3.3V)

* One High-Voltage 100mA Low-IQ Linear Regulator (3.3V)

* One Low-Voltage 1.6A Buck Converter (1V)

* One 175mA Low-Voltage Linear Regulator (1.8V)

* Power-Good Outputs