MAX1514 Datasheet | Maxim Integrated

Description Features - 2.7V to 5.5V Input Supply Range - Input-Supply Undervoltage Lockout - Current-Mode Step-Up Controller Fast Transient Response to Pulsed Load High Efficiency Lossless Current Sensing 430k Hz/750k Hz/1.5MHz Switching Frequency - Linear-Regulator Controllers for VGON, VGOFF - Linear-Regulator Controller for Logic Supply - High-Performance Buffer Amplifier (MAX1513 Only) - Additional Linear-Regulator Controller (MAX1513 Only) - Power-Up Sequence and VGON Delay Control - VMAIN, VGON, VGOFF, VGAMMA Shutdown Control - Timer-Delay Fault Latch for All Outputs - Thermal-Overload Protection MAX1513/MAX1514 The MAX1513/MAX1514 provide plete power-supply solutions for active-matrix thin-film transistor (TFT) liquid-crystal displays (LCDs). Both devices include a high-performance step-up regulator controller, three linear-regulator controllers, and an adjustable delay block for startup sequencing. The MAX1513 includes an additional linear-regulator controller and a high-performance buffer amplifier. The MAX1513/MAX1514 can operate from 2.7V to 5.5V input supplies and provide overload protection with timer delay latch on all the regulated outputs. The step-up regulator controller drives an external Nchannel MOSFET to generate the regulated supply voltage for the panel source-driver ICs. Its current-mode control architecture provides fast transient response to pulsed loads. The high switching frequency (up to 1.5MHz) allows the use of ultra-small inductors and ceramic capacitors while achieving efficiencies over 85% using lossless current sensing. The internal soft-start limits the input surge current during startup. The gate-on and gate-off linear-regulator controllers of the MAX1513/MAX1514 provide regulated TFT gate-on PART and gate-off supplies. The gate-on supply is activated . MAX1513ETP after an adjustable delay following the step-up regulator. MAX1514ETP The logic linear-regulator controller can be used to create a low-voltage logic supply. The...