MAX8758

19-3699; Rev 1; 9/05 KIT ATION EVALU E L B AVAILA Step-Up Regulator with Switch Control and Operational Amplifier for TFT LCD General Description Features ♦ 1.8V to 5.5V Input Voltage Range ♦ Input Undervoltage Lockout ♦ 0.5mA Quiescent Current ♦ 640kHz/1.2MHz Current-Mode Step-Up Regulator Fast Transient Response High-Accuracy Output Voltage (1.5%) Built-In 14V, 2.5A, 115mΩ MOSFET High Efficiency Programmable Soft-Start Current Limit with Lossless Sensing Timer-Delay Fault Latch ♦ High-Speed Operational Amplifier ±150mA Output Current 7.5V/µs Slew Rate 12MHz, -3dB Bandwidth Rail-to-Rail Inputs/Outputs ♦ Dual Mode™, Logic-Controlled, High-Voltage Switch with Programmable Delay ♦ Thermal-Overload Protection ♦ 24-Pin, 4mm x 4mm, Thin QFN Package MAX8758 The MAX8758 includes a high-performance step-up regulator, a high-speed operational amplifier, and a logiccontrolled, high-voltage switch-control block with programmable delay. The device is optimized for thin-film transistor (TFT) liquid-crystal display (LCD) applications. The step-up DC-DC regulator provides the regulated supply voltage for the panel source driver ICs. The converter is a high-frequency (640kHz/1.2MHz), current-mode regulator with an integrated 14V 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 regulator achieves efficiencies over 85% by bootstrapp...