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IRU3013 Datasheet(PDF) 1 Page - International Rectifier |
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IRU3013 Datasheet(HTML) 1 Page - International Rectifier |
1 / 6 page IRU3013 1 Rev. 1.2 09/06/01 TYPICAL APPLICATION DESCRIPTION The IRU3013 controller IC is specifically designed for Intel Pentium III microprocessor applications as de- scribed in the VRM 8.5 specification. The IC provides a single chip solution for the Vcore, 1.2V AGTL+, 1.8V and a third uncommitted LDO controller that can be used either as 1.2V power good detector or to provide 1.5V AGP bus in applications that this voltage is required. The IRU3013 features a patented topology that, in combination with a few external com- ponents, (*Note: See application current in figure 3) will provide in excess of 30A of output current for an on- board Vcore synchronous converter while automatically providing the output voltage specified in VRM 8.5 speci- fication. The IRU3013 also features, loss-less current sensing by using the RDS(ON) of the high side Power MOSFET as the sensing resistor, a Power Good win- dow comparator that switches its open collector output low when the output is outside of a ±10% window. Other features of the device are: Under-voltage lockout for both 5V and 12V supplies, an external programmable soft- start function, and the ability to program the oscillator frequency by connecting an external capacitor. Meets Latest VRM 8.5 Specification Provides Single Chip Solution for Vcore, 1.2V AGTL+, 1.8V and VDDQ On-Board 5-Bit DAC and Decoder programs the out- put voltage from 1.050V to 1.825V Loss-less Short Circuit Protection Synchronous operation allows maximum efficiency Patented architecture allows fixed frequency opera- tion as well as 100% duty cycle when operating with a changing load Minimum Part Count, No External Compensation Soft-Start High current totem pole driver for directly driving an external Power MOSFET Power Good Function PACKAGE ORDER INFORMATION FEATURES VRM 8.5 COMPATIBLE 5-BIT PROGRAMMABLE SYNCHRONOUS BUCK CONTROLLER IC WITH TRIPLE LDO CONTROLLER Pentium III with VRM 8.5 Specification DC to DC Converters Note: Pentium III is trade mark of Intel Corp. TA (°C) DEVICE PACKAGE 0 To 70 IRU3013CW 24-Pin Plastic SOIC WB 0 To 70 IRU3013CQ 24-Pin Plastic QSOP APPLICATIONS Data Sheet No. PD94249 Figure 1 - Typical application of IRU3013. LINEAR CONTROL LINEAR CONTROL SWITCHER CONTROL IRU3013 VOUT3 5V VOUT1 VOUT4 LINEAR CONTROL VOUT2 3.3V VRM 8.5 VID |
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