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IRU3005CWPBF

更新时间： 2024-11-28 14:42:55
品牌 Logo 应用领域
英飞凌 - INFINEON 开关光电二极管
页数 文件大小 规格书
14页 83K
描述
Switching Controller, 250kHz Switching Freq-Max, PDSO20, PLASTIC, SOIC-20

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IRU3005CWPBF 数据手册

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IRU3004, IRU3005  
5-BIT PROGRAMMABLE SYNCHRONOUS BUCK  
CONTROLLER IC WITH DUAL LDO CONTROLLER  
FEATURES  
DESCRIPTION  
The IRU3004/IRU3005 series of controller ICs are spe-  
cifically designed to meet Intel specifications for Pentium  
IIIä microprocessor applications as well as the next  
generation P6 family processors. The IC provides a single  
chip controller IC for the Vcore, GTL+ and clock sup-  
plies required for the Pentium III applications. These  
devices feature a patented topology, that in combina-  
tion with a few external components as shown in the  
typical application circuit, will provide in excess of 20A  
of output current for an on-board DC-DC converter while  
automatically providing the right output voltage via the  
five-bit internal DAC meeting the latest VRM specifica-  
tion. These products also feature loss-lesscurrent sens-  
Meets latest VRM 8.4 specification for PIII  
Provides single chip solution for Vcore, GTL+ and  
clock supply  
On-board DAC programs the output voltage from  
1.3V to 3.5V. The IRU3004/IRU3005 remains on for  
VID code of (11111).  
Dual linear regulator controller on-board for 1.5V  
GTL+ and 2.5V clock supplies  
Loss-less short circuit protection  
Synchronous operation allows maximum efficiency  
Patented architecture allows fixed frequency opera-  
tion as well as 100% duty cycle during dynamic  
load  
ing by using the R  
of the high side power MOSFET  
Minimum part count. No external compensation.  
Soft start  
High current totem pole driver for direct driving of the  
external power MOSFET  
DS(on)  
as the sensing resistor and a Power Good window com-  
parator that switches its open collector output low when  
the output is outside of a ±10% window. Other features  
of the device are: Undervoltage lockout for both 5V and  
12V supplies, an external programmable soft start func-  
tion as well as programming the oscillator frequency by  
using an external capacitor.  
Power Good function  
APPLICATIONS  
Pentium III & next generation processor DC to DC  
converter application  
Low cost Pentium with AGP  
TYPICAL APPLICATION  
L1  
L2  
Q1  
5V  
Vout 3  
R16  
R17  
C16  
C5  
R1  
C7  
R4  
Q2  
C13  
C3  
C4  
C10  
R2  
R3  
R12  
R13  
3.3V  
12V  
C6  
Q3  
Vout 1  
Vout 2  
C11  
R18  
12  
V12  
5
V5  
8
CS+  
9
7
CS-  
11  
10  
Gnd  
14  
Vfb3  
R7  
R8  
HDrv  
LDrv  
R11  
C15  
1
Ct  
Lin1 2  
C1  
IRU3004  
13 SS  
D4  
Vfb1  
Lin2  
3
Q4  
C2  
D3  
16  
D2  
17  
D1  
18  
D0  
19  
PGd  
6
Vfb2  
4
15  
20  
C9  
C12  
R14  
R15  
VID4  
3004app2-2.0  
VID3  
VID2  
VID1  
VID0  
R9  
3.3V  
C14  
R5  
PowerGood  
C8  
Notes: Pentium III is trademark of Intel Corp.  
PACKAGE ORDER INFORMATION  
Ta (°C)  
0 TO 70  
0 TO 70  
Device  
IRU3004CW  
IRU3005CW  
Package  
20-pin Plastic SOIC WB  
20-pin Plastic SOIC WB  
2.5V Output Voltage  
Adjustable  
Fixed  
Rev. 1.2  
12/8/00  
4-3  
1234567...14

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