LX1670

Features:

1% TOTAL OUTPUT ERROR
POWER GOOD, UV, 0V COMPARATORS
0V COMPARATOR HAS SCR DRIVE
UNDER-VOLTAGE LOCKOUT CAPABILITY
5-BIT INPUT FOR ADVANCED PENTIUM PRO PROCESSOR APPLICATIONS (5TH BIT IS FOR AUTOMATIC GAIN AND OFFSET SCALING)
IMPLEMENTS 1% DC ACCURATE CONTROL SYSTEM
14-PIN NARROW BODY SOIC PACKAGE


Application

PENTIUM II & PENTIUM PRO VOLTAGE REGULATOR MODULES
PROGRAMMABLE POWER SUPPLIES
VOLTAGE REFERENCE
ADVANCED MICROPROCESSOR SUPPLIES


Pinout




Specifications

Supply Voltage (VCC) ............................................................................-0.3V to +15V
PGOOD, D0-D3, D4, ENABLE, BLKEN ................................................ -0.3V to VCC+0.3
VIDO, OVOUT, VSENSE ........................................................................... -0.3V to +5V
OVOUT ............................................................................................................ -35mA
VIDO.................................................................................................................. -5mA
Operating Junction Temperature
Plastic (D Package) ...........................................................................................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 LX1670 is a complete precision reference and voltage monitor circuit for the Intel Pentium® Pro Processor and other high-end microprocessor supplies. It is designed for use in conjunction with the LX1660/1661 PWM controller. The LX1670 reads a 5-bit voltage identification (VID) code from the microprocessor and sets the output voltage reference to be used by the LX1660/61 controller. Together, they convert +5 or 12V input power to an adjustable output ranging from 1.8VDC to 3.5VDC in 100mV steps (50mV steps below 2.1V) with 1% DC system accuracy.