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LX1660

Part Number	LX1660
Manufacturer	Microsemi Corporation
Description	ADVANCED PWM CONTROLLER
Published	Mar 30, 2005
Detailed Description	LIN D O C #: 1660 LX1660/1661 A DVANCED PWM CONTROLLER T H E I N F I N I T E P O W E R O F I N N O VA T I O N P...
Datasheet	LX1660 PDF File

Overview

LIN D O C #: 1660 LX1660/1661 A DVANCED PWM CONTROLLER T H E I N F I N I T E P O W E R O F I N N O VA T I O N P R O D U C T I O N D A T A S H E E T DESCRIPTION The LX1660 and LX1661 Are Monolithic Switching Regulator Controller ICs designed to provide low-cost, highperformance adjustable power supply for microprocessors and other applications requiring a fast transient response and a high degree of accuracy.
They provide an adjustable synchronous Pulse Width Modulator output suitable for a power supply for Pentium® or other microprocessors.
Synchronous Rectifier Driver For CPU Core.
The devices can drive dual MOSFETs resulting in typical efficiencies of 85 - 90%, even with loads in excess of 10A.
Synchronous shutdown results in increased efficiency in light load applications.
Short-Cir cuit Current Limiting Without Expensive Current Sense Resistors.
The current sensing mechanism can use a PCB trace resistance or the parasitic resistance of the main inductor.
For applications requiring a high degree of accuracy, a conventional sense resistor can be used.
Hiccup Mode Fault Protection.
The hiccup mode is programmable and with pulse-by-pulse current limiting will help protect the power supply system and load in the even of a short circuit.
Ultra-Fast Transient Response Reduces System Cost.
The fixed frequency modulated off-time architecture results in the fastest transient response for a given inductor.
Adaptive voltage positioning (LX1661 only) requires fewer low-ESR capacitors to meet stringent transient overand under-shoot specifications.
K E Y F E AT U R E S s Designed To Drive A Synchronous Rectifier Stage — Can Also Be Used In NonSynchronous Applications s Soft-Start Capability s Hiccup-Mode Fault Protection s No Current-Sense Resistor Required For Current Limiting s Modulated Constant Off-Time Control Mechanism For Fast Transient Response And Simple System Design s 2V, 0.
5% Internal Voltage Reference Brought Out A P P L I C AT I O N S s s s s s P...

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