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.
The MAX1530/MAX1531 include soft-start functions to
limit inrush current during startup. An internal stepdown
converter current-limit function and a versatile
overcurrent shutdown protect the power supplies against
fault conditions. The MAX1530/MAX1531 use a currentmode
control architecture, providing fast load transient
response and easy compensation. An internal linear
regulator provides MOSFET gate drive and can be
used to power small external loads.
The MAX1530/MAX1531 can operate from inputs as
high as 28V and are well suited 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 operate
over the -40°C to +85°C temperature range.
Applications
LCD Monitors and TVs
Automotive LCDs