LX1665

Features:

  5-bit Programmable Output For CPU Core Supply
  Adjustable Linear Regulator Driver Output
  No Sense Resistor Required For Short-Circuit Current Limiting
  Designed To Drive Either Synchronous Or Non-Synchronous Output Stages
 Soft-Start Capability
  Modulated, Constant Off-Time Architecture For Fast Transient Response And Simple System Design
  Available Over-Voltage Protection (OVP) Crowbar Driver And Power Good Flag (LX1665 only)


Application

 Socket 7 (Pentium Class) Microprocessor Supplies (including Intel Pentium Processor, AMD-K6TM
And Cyrix® 6x86TM, Gx86TM and M2TM Processors)
Pentium II and Deschutes Processor & L2- Cache Supplies
Voltage Regulator Modules


Pinout




Specifications

Supply Voltage (VC1) .................................................................................................... 25V
Supply Voltage (VCC) .................................................................................................... 15V
Output Drive Peak Current Source (500ns)............................................................... 1.5A
Output Drive Peak Current Sink (500ns) ................................................................... 1.5A
Input Voltage (SS, INV, VCC_CORE, CT, VID0-VID4) ........................................... -0.3V to 6V
Operating Junction Temperature
Plastic (N, D & DW Packages) ............................................................................. 150°C
Storage Temperature Range .................................................................... -65°C to +150°C
Lead Temperature (Soldering, 10 Seconds) ............................................................. 300°C
Note 1. Exceeding these ratings could cause damage to the device. All voltages are with respect
to Ground. Currents are positive into, negative out of the specified terminal. Pin
numbers refer to DIL packages only.

Description

The LX1664/64A and LX1665/65A are monolithic switching regulator controller IC's 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.