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MAX1531

Maxim Integrated Products
Part Number MAX1531
Manufacturer Maxim Integrated Products
Description Multiple-Output Power-Supply Controllers
Published Oct 12, 2006
Detailed Description www.DataSheet4U.com 19-2866; Rev 0; 5/03 Multiple-Output Power-Supply Controllers for LCD Monitors General Description...
Datasheet PDF File MAX1531 PDF File

MAX1531
MAX1531

Overview
www.
DataSheet4U.
com 19-2866; Rev 0; 5/03 Multiple-Output Power-Supply Controllers for LCD Monitors 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.
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.
Features o 4.
5V to 28V Input Voltage Range o 250kHz/500kHz Current-Mode Step-Down Converter Small Inductor/Capacitors No Sense Resistor o Three Positive Linear Regulator Controllers One Positive and One Negative Additional Controller (MAX1531) Small Input and Output Capacitors o Timed Reset Output o Uncommitted Overcurrent Protection (MAX1531) o Soft-Start for All Regulators o Programmable Input Undervoltage Comparator o Programmable St...


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