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LM3487 Datasheet PDF - National-Semiconductor

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Part NumberLM3487 National-Semiconductor
National ->Texas Instruments National-Semiconductor
DescriptionHigh Efficiency High-Side N-Channel Controller for Switching Regulator
LM3487 Datasheet PDF : LM3487 pdf   
LM3487 image

General Description
The LM3487 is a high-side N-channel MOSFET switching regulator controller. It can be used in topologies requiring a high side MOSFET such as buck, inverting (buck-boost) and zeta regulators. The LM3487's internal push pull driver allows compatibility with a wide range of MOSFETs. A wide input
voltage range and an adjustable current limit allow the LM3487 to be optimized for a wide variety of applications.
The LM3487 has an adjustable switching frequency which can also be synchronized to an external clock. Current-mode control requires only a single resistor and capacitor for frequency compensation. The current mode architecture also yields superior line and load regulation and cycle-by-cycle
current limiting. A 7µA shutdown state can be used for power savings and for power supply sequencing. Other features in clude external soft-start to reduce inrush current and output
over voltage protection.

Features
■ Adjustable/synchronizable switching frequency from 100kHz to 1.4MHz
■ Adjustable cycle by cycle current limit
■ Wide 3V-35V input voltage range
■ Thermal shutdown
■ Frequency compensation optimized with a single capacitor and resistor
■ External softstart
■ Current mode operation
■ Undervoltage lockout with hysteresis
■ 10-lead Mini-SO10 (MSOP-10) package
■ Automotive grade including AEC-Q100 is available

Applications
■ ADSL Modems
■ Local Voltage Regulation
■ Distributed Power
■ Notebook and Palmtop Computers
■ Internet Appliances
■ Printers and Office Automation
■ Battery operated Devices
■ Cable Modems
■ Battery Chargers

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