General Description
The MAX1530/MAX1531 multiple-output power-supply controllers generate all the supply rails for thin-film transistor (TFT) liquid-crystal display (LCD) monitors. Both devices include a high-efficiency, fixed-frequency, step-down regulator. The low-cost, all N-channel, synchronous topology enables operation with efficiency as high as 93%. High-frequency operation allows the use of small inductors and capacitors, resulting in a compact solution. The MAX1530 includes three linear regulator controllers and the MAX1531 includes five linear regulator controllers for supplying logic and LCD bias voltages. A programmable startup sequence enables easy control of the regulators.

FEATUREs
♦ 4.5V to 28V Input Voltage Range
♦ 250kHz/500kHz Current-Mode Step-Down Converter
   Small Inductor/Capacitors
   No Sense Resistor
♦ Three Positive Linear Regulator Controllers
   One Positive and One Negative Additional
   Controller (MAX1531)
   Small Input and Output Capacitors
♦ Timed Reset Output
♦ Uncommitted Overcurrent Protection (MAX1531)
♦ Soft-Start for All Regulators
♦ Programmable Input Undervoltage Comparator
♦ Programmable Startup Sequencing