MAX17010

The MAX17010 contains a high-performance step-up switching regulator, a high-speed operational amplifier (op amp), and a high-voltage level-shifting scan driver.The device is optimized for thin-film transistor (TFT) liquidcrystal display (LCD) applications.

Features of the MAX17010 are:(1)1.8 V to 5.5V IN supply voltage range; (2)3mA SUP quiescent current (switching); (3)1.2MHz current-mode step-up regulator; (4)thermal-overload protection; (5)40-Pin, 5mm x 5mm, thin QFN package; (6)high-voltage level-shifting scan drivers.The step-up DC-DC converter provides the regulated supply voltage for the panel-source driver ICs. The converter is a 1.2MHz current-mode regulator with an integrated 20V n-channel power MOSFET. The high switching frequency allows the use of ultra-small inductors and ceramic capacitors. The current-mode control architecture provides fast transient response to pulsed loads.

The absolute maximum ratings of the MAX17010 can be summarized as:(1)VL to AGND:-0.3V to +6.0V;(2)COMP, FB to GND:-0.3V to (VL + 0.3V);(3)storage temp:-55 to +150;(4)operating temp:-40 to 85;(5)LX to GND:-0.3V to +20V;(6)LX, PGND RMS current rRating:2.4A.Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.The undervoltage lockout (UVLO) circuit compares the input voltage at IN with the UVLO threshold (1.3V rising and 1.2V falling) to ensure that the input voltage is high enough for reliable operation. The 100mV (typ) hysteresis prevents supply transients from causing a restart. Once the input voltage exceeds the UVLO rising threshold,startup begins. When the input voltage falls below the UVLO falling threshold, the controller turns off the main step-up regulator and the linear regulator outputs, disables the switch-control block, and the op amp outputs are high impedance.