Product Summary

The LX1668DW is a Monolithic Switching Regulator Controller IC designed to provide a low cost, high performance adjustable power supply for advanced microprocessors and other applications requiring a very fast transient response and a high degree of accuracy. The LX1668DW provides a programmable switching regulator output, together with one internal linear low dropout regulator and one adjustable linear regulator driver. The LX1668DW offers a triple-output single-chip power supply for Pentium II and other processors. The typical applications of LX1668DW include: (1)Pentium II & Pentium III Processor Supplies; (2)Voltage Regulator Modules; (3)General Purpose And Microprocessor DC:DC Supplies.

Parametrics

LX1668DW absolute maximum ratings: (1)12V Supply Voltage (VCC12): 18V; (2)5V Supply Voltage (VCC5): 7V; (3)Supply Voltage (Internal LDO)/(VCC3): 7V; (4)Output Drive Peak Current Source (500ns): 1.0A; (5)Output Drive Peak Current Sink (500ns): 1.0A; (6)Input Voltage (SS, VID[0:4]): -0.3V to 6V; (7)Operating Junction Temperature: 150℃; (8)Storage Temperature Range: -65℃ to +150℃; (9)Lead Temperature (Soldering, 10 Seconds): 300℃; (10)Peak Package Solder Reflow Temp.(40 seconds max. exposure): 260℃(+0, -5).

Features

LX1668DW features: (1)5-Bit Programmable Output For CPU Core Supply; (2)Internal Fixed 2.5V Low Dropout Regulator; (3)Adjustable Linear Regulator Driver; (4)Complete Single-Chip Power; (5)Solution For Pentium II Processors; (6)No Sense Resistor Required For Short-Circuit Current Limiting; (7)Soft-Start And Hiccup-Mode Current Limiting Functions; (8)Modulated Constant Off-Time Control Mechanism For Fast Transient Response And Simple System Design; (9)Power Good Flag; (10)Over-Voltage Pin & SCR; (11)Digital-Compatible Inputs (Including VID Pins); (12)Output Disable Function Shuts Off PWM While Keeping 2.5V LDO Active - Compatible With "Green PC" And "Instant On" Requirements; (13)Compatible to VRM8.2 - 8.4 Specifications.

Diagrams

LX1668DW circuit diagram

LX1660
LX1660

Other


Data Sheet

Negotiable 
LX1660CD
LX1660CD


IC PWM MONO SWITCHING REG 16SOIC

Data Sheet

Negotiable 
LX1660CN
LX1660CN


IC PWM MONO SWITCHING REG 16DIP

Data Sheet

Negotiable 
lx1661
lx1661

Other


Data Sheet

Negotiable 
LX1661CD
LX1661CD


IC PWM MONO SWITCHING REG 16SOIC

Data Sheet

Negotiable 
LX1661CN
LX1661CN


IC PWM MONO SWITCHING REG 16DIP

Data Sheet

Negotiable