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參數(shù)資料
| 型號(hào)： | IRU3011CW |
| 廠商： | International Rectifier |
| 英文描述： | 5-BIT PROGRAMMABLE SYNCHRONOUS BUCK CONTROLLER IC |
| 中文描述： | 5位可編程同步降壓控制器IC |
| 文件頁(yè)數(shù)： | 1/13頁(yè) |
| 文件大?。?/td> | 77K |
| 代理商： | IRU3011CW |
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IRU3011
1
Rev. 1.6
08/20/02
www.irf.com
TYPICAL APPLICATION
5V
L1
DESCRIPTION
The IRU3011 controller IC is specifically designed to meet
Intel specification for latest Pentium III
microproces-
sor applications as well as the next generation P6 fam-
ily processors. These products feature a patented topol-
ogy that in combination 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 5-bit internal DAC. These devices also
features, loss less current sensing by using the R
DS(ON)
of the high side Power MOSFET as the sensing resis-
tor, a Power Good window comparator that switches its
open collector output low when the output is outside of a
±
10% window and an Over-Voltage Protection output.
Other features of the device are: Under-voltage lockout
for both 5V and 12V supplies, an external programmable
soft-start function as well as programming the oscillator
frequency by using an external capacitor.
Dual Layout compatible with HIP6004A
Designed to meet Intel specification of VRM8.4 for
Pentium III
On-Board DAC programs the output voltage from
1.3V to 3.5V. The IRU3011 remains on for VID code
of (11111).
Loss-less Short Circuit Protection
Synchronous operation allows maximum efficiency
Patented architecture allows fixed frequency
operation as well as 100% duty cycle during
dynamic load
Over-Voltage Protection Output
Soft-Start
High current totem pole driver for direct driving of the
external power MOSFET
Power Good Function
APPLICATIONS
Pentium III & Pentium II
processor DC to DC
converter application
Low Cost Pentium with AGP
PACKAGE ORDER INFORMATION
FEATURES
5-BIT PROGRAMMABLE SYNCHRONOUS BUCK
CONTROLLER IC
Note:
Pentium II and Pentium III are trade marks of Intel Corp.
T
A
(
8
C)
0 To 70
DEVICE PACKAGE VID VOLTAGE RANGE
IRU3011CW 20-Pin Plastic SOIC WB (W) 1.3V to 3.5V
Data Sheet No. PD94143
Figure 1 - Typical application of the IRU3011.
V
OUT
(1.3V - 3.5V)
12V
VID0
Power Good
Q2
VID1
VID2
VID3
VID4
C5
R1
C3
C6
Q1
R2
R3
C8
R4
C10
C14
C1
C7
C2
R6
C12
R8
C13
C11
R7
R9
R5
C9
D1
C4
L2
HDrv
LDrv
NC/Gnd
SS
CS+
Gnd
NC/Sen
D3
D2
D4
D1
D0
IRU3011
V
FB
V5/Comp
CS-
V12
NC/
Boot
OVP
PGd
Ct/Rt
OVP
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