Notebook LCD supply exceeds 85% efficiency

Notebook LCD supply exceeds 85% efficiency

The newly released MAX17088 power-management IC (PMIC) integrates a boost regulator, programmable VCOM calibrator with nonvolatile memory, high-current operational amplifier, and a level-shifting scan driver for notebook LCD panels. This device includes all functions required to power the LCD source drivers, gate drivers, and VCOM backplane. Through this high level of integration, the MAX17088 provides a cost-effective power solution for LCD panels in notebooks and monitors.

The boost regulator has a 1.2 MHz switching frequency and integrates a 20 V, 150 milliohm power MOSFET. It delivers output voltages up to 18 V from a 1.8 to 5.5 V input while achieving greater than 85% efficiency. The integrated operational amplifier drives the VCOM backplane and features ±150 mA short-circuit current with a 40 V/microsecond slew rate. It also integrates a scan driver that drives from -25 to 45 V and allows output charge sharing to save power. The 2-wire, I2C-controlled VCOM calibrator provides 7-bit setting accuracy and minimizes connector pin count.

The MAX17088 is available in a 6 x 6 mm, 36-pin TQFN package and is fully specified over the -40° to 85° C temperature range. For more information, visit Maxim Integrated Products.

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