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IRU3027 PDF预览

IRU3027

更新时间: 2024-11-27 21:54:15
品牌 Logo 应用领域
英飞凌 - INFINEON 控制器
页数 文件大小 规格书
10页 68K
描述
5-BIT PROGRAMMABLE SYNCHRONOUS BUCK CONTROLLER IC WITH TRIPLE LDO CONTROLLER

IRU3027 数据手册

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Data Sheet No. PD94146  
IRU3027  
5-BIT PROGRAMMABLE SYNCHRONOUS BUCK CONTROLLER IC  
WITH TRIPLE LDO CONTROLLER  
FEATURES  
DESCRIPTION  
Designed to meet VRM 9.0 specification for next  
generation microprocessors  
The IRU3027 controller IC is specifically designed to meet  
VRM 9.0 specification for next generation microproces-  
sor applications requiring multiple on-board regulators.  
The IRU3027 provides a single chip controller IC for the  
Vcore, three LDO controllers, one with an automatic se-  
lect pin that connects to the Type Detect pin of the AGP  
slot for the AGP VDDQ supply, one for GTL+ and the other  
for the 1.8V chip set regulator as required for the next  
generation PC applications. The IRU3027 is designed to  
use either bipolar transistors for VOUT3(1.5V) and  
VOUT4(1.8V). No external resistor divider is necessary  
for any of the regulators. The switching regulator fea-  
tures a patented topology that in combination with a few  
external components as shown in the typical applica-  
tion circuit, will provide well in excess of 20A of output  
current for an on-board DC-DC converter while automati-  
cally providing the right output voltage via the 5-bit inter-  
nal DAC. The IRU3027 also features loss-less current  
sensing for both switchers by using the RDS(ON) of the  
high side power MOSFET as the sensing resistor, an  
output under-voltage shutdown that detects short circuit  
condition for the linear outputs and latches the system  
off, and a Power Good window comparator that switches  
its open collector output low when any one of the out-  
puts is outside of a pre-programmed window.  
On-Board 5-Bit DAC programs the output voltage  
from 1.075V to 1.850V in 25mV steps  
Linear Regulator Controller On-Board for 1.8V  
Provides single chip solution for Vcore, GTL+,  
AGP bus, and 1.8V  
Automatic Voltage Selection for AGP Slot VDDQ  
Supply  
Linear Regulator Controller On-Board for 1.5V  
GTL+ Supply  
Loss-less Short Circuit Protection for all Outputs  
Synchronous operation allows maximum effi-  
ciency  
Patented architecture allows fixed frequency  
operation as well as 100% duty cycle during  
dynamic load  
Minimum Part Count  
Soft-Start  
High current totem pole driver for direct driving of  
the external power MOSFET  
Power Good function monitors all outputs  
Over-Voltage Protection Circuitry protects the  
switcher output and generates a fault output  
APPLICATIONS  
Total power solution for next generation Intel  
processor application  
AMD K7 Low Cost Solution  
TYPICAL APPLICATION  
5V  
3.3V  
LINEAR  
CONTROL  
SWITCHER  
CONTROL  
VOUT1  
V
OUT  
2
3
IRU3027  
LINEAR  
CONTROL  
LINEAR  
CONTROL  
VOUT  
VOUT4  
Figure 1 - Typical application of IRU3027.  
PACKAGE ORDER INFORMATION  
TA (8C)  
DEVICE  
PACKAGE  
0 To 70  
IRU3027CW  
28-Pin Plastic SOIC WB  
Rev. 1.5  
07/17/02  
www.irf.com  
1

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