MAXIM Integrated Products, represented by Arrow Electronics , has introduced the MAX1530/MAX1531 which generate all 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 93% efficiency. High-frequency operation allows the use of small inductor 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 provides easy control of the regulators.
The MAX1530/MAX1531 include soft-start functions to limit inrush current during startup. An internal current-limit function protects the power supplies against fault conditions.
The MAX1530/MAX1531's current-mode control architecture provides fast load-transient response and easy compensation. An internal linear regulator provides MOSFET gate drive and powers small external loads.
The MAX1530/MAX1531 operate from inputs as high as 28V and are suitable for LCD monitor and TV applications running directly from ac-dc wall adapters.
Both devices are available in a small (5mm x 5mm), ultra-thin (0.8mm), 32-pin QFN package and are specified over the -40°C to +85°C temperature range.