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LX1670


Part Number LX1670
Manufacturer Microsemi Corporation
Title 5 - BIT PROGRAMMABLE VOTAGE REFERENCE
Description The LX1670 is a complete precision reference and voltage monitor circuit for the Intel Pentium® Pro Processor and other high-end microprocessor su...
Features AIN AND OFFSET SCALING) p IMPLEMENTS 1% DC ACCURATE CONTROL SYSTEM p 14-PIN NARROW BODY SOIC PACKAGE PRODUCT HIGHLIGHT A P P L I C AT I O N S s PENTIUM II & PENTIUM PRO VOLTAGE REGULATOR MODULES s PROGRAMMABLE POWER SUPPLIES s VOLTAGE REFERENCE s ADVANCED MICROPROCESSOR SUPPLIES T Y P I C A L A P...

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LX1672 : KEY FEATURES WWW . Microsemi . C OM The LX1672 is a highly integrated power supply controller IC featuring www.DataSheet4U.net two PWM switching regulator stages with an additional onboard linear regulator driver. The two constant frequency voltagemode PWM phases can be easily configured as a single Bi-Phase high current output, two independently regulated outputs, or as a DDR memory I/O supply with a tracking DDR termination voltage supply. Power loss and noise, due to the ESR of the input capacitors, are minimized by operating each PWM output 180° out of phase. This architecture also minimizes capacitor requirements while maximizing regulator response. In bi-phase operation, the high cu.

LX1673 : KEY FEATURES WWW . Microsemi . C OM The LX1673 is a highly integrated power supply controller IC featuring one www.DataSheet4U.net PWM switching regulator stage with an additional onboard linear regulator driver. With several switching frequencies available (up to 900kHz) the LX1673 can be optimized for both cost and PCB space. Utilizing external compensation, a wide selection of external components can be chosen for use in any application while maintaining stable operation. The LX1673 incorporates a fully programmable soft-start and power sequence capabilities. The LDO and PWM have independent enable pins. With onboard gate drivers, the switching PWM output is capable of sourcing up to .

LX1675 : KEY FEATURES ƒ Four Independently Regulated Outputs ƒ Single Input Supply with Wide Voltage Range: 4.5-24V ƒ Outputs As Low As 0.8V Generated From a Precision Internal Reference ƒ Selectable PWM Frequency of 300KHz or 600KHz ƒ Buffered Reference Voltage Output ƒ Multiphase Output Reduces Need for Large Input Capacitance at High Currents ƒ Integrated High Current MOSFET Drivers ƒ Independent Soft-Start and Power Sequencing ƒ Adjustable Linear Regulator Driver Output ƒ No Current-Sense Resistors ƒ DDR Termination Compliant ƒ RoHS Compliant for Pb Free APPLICATIONS The LX1675 is a highly integrated power supply controller IC featuring three voltage mode PWM switching www.DataSheet4U.net regul.

LX1676 : KEY FEATURES ƒ High Current Biphase Operation ƒ Outputs As Low As 0.925V ƒ † Biphase LoadSHARETM ƒ † Transient Correction Loop Reduces Required Capacitance ƒ Differential Amplifier For Remote Voltage Sensing ƒ Integrated High Current MOSFET Drivers ƒ 200KHz to 1MHz Frequency Operation ƒ Programmable Slew Rate Control For Start-Up Sequence and VID change ƒ VID Changes On The Fly ƒ Power Good Indicator ƒ Short Circuit Protection ƒ Output Over Voltage and Under Voltage Protection ƒ No current-sense resistors APPLICATIONS The LX1676 is a highly integrated VRM power supply controller IC featuring two PWM switching www.DataSheet4U.net regulator stages. The two constant frequency voltage-mode PWM.

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