DESCRIPTION
A lower voltage secondary logic supply may also be generated with the addition of an external NPN driven by the internal linear regulator. A step-down regulator provides a low voltage output, VLOGIC, with up to 1.2A of current while capable of operating from a wide input range of 4.5V to 30V. A high power step-up converter, a lower power step-up converter and an inverting converter provide the three independent output voltages: AVDD, VON and VOFF required by the LCD panel. A high-side PNP provides delayed turn-on of the VON signal and can handle up to 30mA. Protection circuitry ensures that VON is disabled if any of the four outputs are more than 10% below the programmed voltage. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. PanelProtect is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. FEATURES
n n n n n n n n n n n 4.5V to 30V Input Voltage Range Four Integrated Switches: 2.2...
Linear Technology
