IRU3018CW International Rectifier, IRU3018CW Datasheet

IRU3018CW

Manufacturer Part Number

IRU3018CW

Description

IC CTRL/REG SYNC BUCK 24-SOIC

Manufacturer

International Rectifier

Datasheet

1.IRU3018CW.pdf (18 pages)

Specifications of IRU3018CW

Applications

Controller, Intel Pentium® II

Voltage - Input

5V, 12V

Number Of Outputs

Voltage - Output

1.3 ~ 5.5 V

Operating Temperature

0°C ~ 70°C

Mounting Type

Surface Mount

Package / Case

24-SOIC (7.5mm Width)

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Other names

*IRU3018CW
IRU3018-CW
IRU3018-CW

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

IRU3018CW

Manufacturer:

Quantity:

20 000

Current page: 1 of 18
Download datasheet (96Kb)

FEATURES

APPLICATIONS

TYPICAL APPLICATION

PACKAGE ORDER INFORMATION

Rev. 1.6

07/16/02

5-BIT PROGRAMMABLE SYNCHRONOUS BUCK CONTROLLER IC,

Provides single chip solution for Vcore, GTL+ & clock

supply

200mA On-Board LDO Regulator

Designed to meet the latest Intel specification for

Pentium II

On-Board DAC programs the output voltage from

1.3V to 3.5V

Linear regulator controller on board for 1.5V GTL+

supply

Loss-less Short Circuit Protection with HICCUP

Synchronous operation allows maximum efficiency

patented architecture allows fixed frequency opera-

tion as well as 100% duty cycle during dynamic

load

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 signal

Thermal Shutdown

Logic Level Enable Input

Total Power Solution for Pentium II processor

application

LDO CONTROLLER AND 200mA ON-BOARD LDO REGULATOR

3.3V

OUT

0 To 70

(8C)

Figure 1 - Typical application of IRU3018.

CONTROL

IRU3018

LINEAR

IRU3018CW

DEVICE

www.irf.com

REGULATOR

SWITCHER1

CONTROL

DESCRIPTION

The IRU3018 controller IC is specifically designed to meet

Intel specification for Pentium II

cations as well as the next generation of P6 family pro-

cessors. The IRU3018 provides a single chip controller

IC for the Vcore, LDO controller for GTL+ and an internal

200mA regulator for clock supply which are required for

the Pentium II applications. These devices feature a pat-

ented topology that in combination with a few external

components as shown in the typical application circuit,

will provide in excess of 18A of output current for an on-

board DC-DC converter while automatically providing the

right output voltage via the 5-bit internal DAC. The

IRU3018 also features loss-less current sensing for both

switchers by using the R

MOSFET as the sensing resistor, internal current limit-

ing for the clock supply, and a Power Good window com-

parator that switches its open collector output low when

any one of the outputs is outside of a pre-programmed

window. Other features of the device are: Under-voltage

lockout for both 5V and 12V supplies, an external pro-

grammable soft-start function, programming the oscilla-

tor frequency via an external resistor, Over-Voltage Pro-

tection (OVP) circuitry for both switcher outputs and an

internal thermal shutdown.

LINEAR

24-Pin Plastic SOIC WB

PACKAGE

Note: Pentium II is trademark of Intel Corp

DS(ON)

Data Sheet No. PD94144

of the high-side power

microprocessor appli-

IRU3018

OUT

Related parts for IRU3018CW

IRU3018CW Summary of contents

Page 1

... IRU3018 SWITCHER1 CONTROL LINEAR LINEAR CONTROL REGULATOR Figure 1 - Typical application of IRU3018. DEVICE PACKAGE IRU3018CW 24-Pin Plastic SOIC WB www.irf.com Data Sheet No. PD94144 IRU3018 microprocessor appli- of the high-side power DS(ON) Note: Pentium II is trademark of Intel Corp V 1 OUT ...

Page 2

IRU3018 ABSOLUTE MAXIMUM RATINGS V5 Supply Voltage .................................................... 7V V12 Supply Voltage .................................................. 20V Storage Temperature Range ...................................... -65°C To 150°C Operating Junction Temperature Range ..................... PACKAGE INFORMATION 24-PIN WIDE BODY PLASTIC SOIC (W) TOP VIEW V12 UGate1 1 24 ...

Page 3

PARAMETER SYM Current Limit Section CS Threshold Set Current CS Comp Offset Voltage Hiccup Duty Cycle Output Drivers Section Rise Time Fall Time Dead Band Time Between High Side and Synch Drive Vcore Switcher Only 2.5V Regulator (V 2) OUT ...

Page 4

IRU3018 ...

Page 5

PIN# PIN SYMBOL PIN DESCRIPTION 10 Fault / Rt This pin has dual function. It acts as an output of the OVP circuitry or it can be used to program the frequency using an external resistor. When used as a ...

Page 6

IRU3018 BLOCK DIAGRAM 4. Enable 1 V12 UVLO 1.17Vset V5 8 Vset 6 VID0 2.5V VID1 5 5Bit VID2 4 DAC 1.1Vset VID3 3 VID4 SEN Fb3 16 0.9Vset V12 Gate3 15 1.26V 0.9V ...

Page 7

TYPICAL APPLICATION R22 12V 3. OUT 1.5V C17 OUT 2.5V C18 R7 R8 Figure 3 - Typical application of IRU3018 for an on board DC-DC converter providing power ...

Page 8

IRU3018 IRU3018 APPLICATION PARTS LIST Ref Desig Description Q2 MOSFET Q3 MOSFET Q4 MOSFET with Schottky L1 Inductor L3 Inductor C1,17 Capacitor, Electrolytic C2 Capacitor, Electrolytic C3 Capacitor, Electrolytic C8 Capacitor, Ceramic C9,15,19 Capacitor, Ceramic C10 Capacitor, Ceramic C13 Capacitor, ...

Page 9

TYPICAL APPLICATION (Dual Layout with HIP6018) R22 12V R11 3. OUT 3 1.5V C17 OUT 2.5V C18 R7 R8 Figure 4 - Typical application of IRU3018 in a dual ...

Page 10

IRU3018 IRU3018 APPLICATION PARTS LIST Dual Layout with HIP6018 Ref Desig Description Q2 MOSFET Q3 MOSFET Q4 MOSFET with Schottky L1 Inductor L3 Inductor C1,17 Capacitor, Electrolytic C2 Capacitor, Electrolytic C3 Capacitor, Electrolytic C8 Capacitor, Ceramic C9,15,19 Capacitor, Ceramic C10 ...

Page 11

APPLICATION INFORMATION An example of how to calculate the components for the application circuit is given below. Assuming, two set of output conditions that this regula- tor must meet for Vcore: a) Vo=2.8V, Io=14.2A, DVo=185mV, DIo=14.2A b) Vo=2V, Io=14.2A, DVo=140mV, ...

Page 12

IRU3018 Output Inductor Selection The output inductance must be selected such that un- der low line and the maximum output voltage condition, the inductor current slope times the output capacitor ESR is ramping up faster than the capacitor voltage is ...

Page 13

Next, a heat sink with lower u than the one calculated SA in the previous step must be selected. One way to do this is to look at the graphs of the “Heat Sink Temp Rise Above the Ambient” vs. ...

Page 14

IRU3018 For 1.5V supply Assuming R =100V B 3 (Vo REF Rt = 1003 (1.5/1.26 19.1V For 2.5V supply Assuming R =200V B 3 (Vo ...

Page 15

Place the output inductor, L3 and the output capaci- tors, C16 between the mosfet and the load with out- put capacitors distributed along the slot 1 and close to it. 5) Place the bypass capacitors, C8 and C19 right ...

Page 16

IRU3018 IRU3018 APPLICATION PARTS LIST Dual Layout with HIP6016 Ref Desig Description Q3,4 MOSFET Q5 MOSFET MOSFET L1 Inductor L3 Inductor C16 Capacitor, Electrolytic C14 Capacitor, Electrolytic C3 Capacitor, Electrolytic C18 Capacitor, Electrolytic C17,C1 Capacitor, Electrolytic C2 Capacitor, ...

Page 17

Surface Mount, Wide Body PIN NO. 1 NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. Rev. 1.6 07/16/02 (W) SOIC Package C E DETAIL 0.51 0.020 SYMBOL 24-PIN MIN ...

Page 18

IRU3018 PACKAGE SHIPMENT METHOD PKG PACKAGE DESIG DESCRIPTION W SOIC, Wide Body IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105 18 PIN PARTS COUNT PER TUBE Feed Direction Figure ...

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