LD7301

ACPI-STR Controller LD7301/02 4/13/2006 REV: 00 General Description The LD7301/02 is an ACPI-compliant controller for the applications of microprocessor and computers. It integrates a switch controller to generate a 5VDL from ATX power supply, a linear controller VDDQ and a bus terminator VTT controller. As well, it supports DDRI and DDRII with dual modes. The device also integrates a charge pump engine, which enables to drive a NMOS application. As well, the LD7301/02 also offers power OK status checking and reporting, under voltage detection, soft start and shutdown function necessary for complete ACPI implementation. Features Dual Modes of Configuration Under Voltage Protection Power OK status checking and reporting Soft Start Function Shutdown Function Drives all NMOS Designs +1, -1.5% accuracy for 2.6V (mode A) and 1.8V (mode B) DDR reverse plug in protection Applications ACPI-Compliant Power Regulation for Motherboard The LD7301/02 is available in a space saving SSOP-20 package. + Patent Pending Leadtrend Technology Corporation LD7301/02-DS-00 April 2006 1 LD7301/02 Typical Application 5VSB 5VIN 5VDUAL 1000µF Shutdown 1Ω 1µF 1000µF 5VDRV 5VDLSB PWROK S3# S5# VCC LD7301 DRV1 VDDQ BTDRV VTT VSET0 VSET1 VSET2 GND BTSINK SEL SS C1 C2 CHRPMP 0.1µF 0.1µF 0.1µF 5VSB Fig. 1 The Application Circuit for Mode A of LD7301 Note: The LD7301 is for 5V Logic System 3.3VDUAL 2.6VDUAL 2000µF 1.3VDUAL 1000µF Mode A DDRI SEL VSET0 VSET1 VSET2 5V 0V 0...