IRU3007CWTR datasheet, PDF - EEWORLD Datasheet

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IRU3007CWTR: DescriptionIC CTRL/REG SYNC BUCK 28-SOIC; Categorysemiconductor Power management; File Size96KB，17 Pages; ManufacturerInfineon; Websitehttp://www.infineon.com/

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IRU3007CWTR Overview

IC CTRL/REG SYNC BUCK 28-SOIC

IRU3007CWTR Parametric

Parameter Name	Attribute value
application	Controller, Intel Pentium® II
Voltage - input	5V，12V
Number of outputs	4
Voltage - Output	1.3 V ~ 3.5 V
Operating temperature	0°C ~ 70°C
Installation type	surface mount
Package/casing	28-SOIC (0.295", 7.50mm wide)
Supplier device packaging	28-SOIC

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Data Sheet No. PD94142

IRU3007

5-BIT PROGRAMMABLE SYNCHRONOUS BUCK, NON-SYNCHRO-

NOUS, ADJUSTABLE LDO AND 200mA ON-BOARD LDO

FEATURES

DESCRIPTION

Provides Single Chip Solution for Vcore, GTL+,

Clock Supply & 3.3V Switcher On-Board

Second switcher provides simple control for the

on-board 3.3V supply

200mA On-Board LDO Regulator

Designed to meet Intel VRM 8.2 and 8.3 specifica-

tion 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

Synchronous Operation allows maximum efficiency

Patented architecture allows fixed frequency

operation as well as 100% duty cycle during

dynamic load

Minimum Part Count

Soft-Start

High current totem pole drivers for directly driving

the external Power MOSFETs

Power Good function monitors all outputs

Over-Voltage Protection circuitry protects the

switcher outputs and generates a fault output

Thermal Shutdown

The IRU3007 controller IC is specifically designed to meet

Intel specification for Pentium II™ microprocessor ap-

plications as well as the next generation of P6 family

processors. The IRU3007 provides a single chip control-

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

internal 200mA regulator for clock supply which are re-

quired for the Pentium II applications. It also contains a

switching controller to convert 5V to 3.3V regulator for

on-board applications that uses either AT type power

supply or is desired not to rely on the ATX power supply’s

3.3V output. These devices feature a patented topology

that in combination with a few external components, as

shown in the typical application circuit, will provide in

excess of 14A of output current for an on-board DC/DC

converter while automatically providing the right output

voltage via the 5-bit internal DAC. The IRU3007 also fea-

tures, loss-less current sensing for both switchers by

using the R

DS(on)

of the high-side power MOSFET as the

sensing resistor, internal current limiting for the clock

supply, 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. Other fea-

tures of the device are: Under-Voltage Lockout for both

5V and 12V supplies, an external programmable soft-

start function, programming the oscillator frequency via

an external resistor, Over-Voltage Protection (OVP) cir-

cuitry for both switcher outputs and an internal thermal

shutdown.

Note:

Pentium II and Pentium Pro are trademarks of Intel Corp.

APPLICATIONS

Total Power Solution for Pentium II processor

application

TYPICAL APPLICATION

SWITCHER2

CONTROL

O U T

SWITCHER1

CONTROL

O U T

IRU3007

O U T

LINEAR

CONTROL

LINEAR

REGULATOR

O U T

Figure 1 - Typical application of IRU3007.

PACKAGE ORDER INFORMATION

(°C)

0 To 70

Rev. 2.1

08/20/02

DEVICE

IRU3007CW

www.irf.com

PACKAGE

28-pin Plastic SOIC WB (W)

IRU3007

PIN#

PIN SYMBOL

Fb2

PIN DESCRIPTION

This pin provides the feedback for the non-synchronous switching regulator. A resistor

divider is connected from this pin to V

OUT

2 and ground that sets the output voltage. The

value of the resistor connected from V

OUT

2 to Fb2 must be less than 100V.

5V supply voltage. A high frequency capacitor (0.1 to 1mF) must be placed close to this

pin and connected from this pin to the ground plane for noise free operation.

This pin provides the soft-start for the 2 switching regulators. An internal resistor charges

an external capacitor that is connected from 5V supply to this pin which ramps up the

outputs of the switching regulators, preventing the outputs from overshooting as well as

limiting the input current. The second function of the Soft-Start cap is to provide long off

time (HICCUP) for the synchronous MOSFET during current limiting.

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 fault detector, if any of

the switcher outputs exceed the OVP trip point, the Fault pin switches to 12V and the

soft-start cap is discharged. If the Fault pin is to be connected to any external circuitry,

it needs to be buffered as shown in the application circuit.

This pin provides the feedback for the internal LDO regulator that its output is V

OUT

This pin is connected to the output of the I/O switching regulator. It is an input that

provides sensing for the Under/Over-voltage circuitry for the I/O supply as well as the

power for the internal LDO regulator.

This pin is the output of the internal LDO regulator.

This pin serves as the ground pin and must be connected directly to the ground plane.

This pin controls the gate of an external transistor for the 1.5V GTL+ linear regulator.

This pin provides the feedback for the linear regulator that its output drive is Gate3.

No connection.

This pin provides the feedback for the synchronous switching regulator. Typically this pin

can be connected directly to the output of the switching regulator. However, a resistor

divider is recommended to be connected from this pin to V

OUT

1 and ground to adjust the

output voltage for any drop in the output voltage that is caused by the trace resistance.

The value of the resistor connected from V

OUT

1 to Fb1 must be less than 100V.

This pin is internally connected to the undervoltage and overvoltage comparators sensing

the Vcore status. It must be connected directly to the Vcore supply.

This pin is connected to the Drain of the power MOSFET of the Core supply and it

provides the positive sensing for the internal current sensing circuitry. An external resis-

tor programs the CS threshold depending on the R

of the power MOSFET. An external

capacitor is placed in parallel with the programming resistor to provide high frequency

noise filtering.

This pin serves as the Power ground pin and must be connected directly to the ground

plane close to the source of the synchronous MOSFET. A high frequency capacitor

(typically 1mF) must be connected from V12 pin to this pin for noise free operation.

Output driver for the synchronous power MOSFET for the Core supply.

This pin is connected to the Source of the power MOSFET for the Core supply and it

provides the negative sensing for the internal current sensing circuitry.

Output driver for the high-side power MOSFET for the Core supply.

This pin is connected to the 12V supply and serves as the power Vcc pin for the output

drivers. A high frequency capacitor (typically 1mF) must be placed close to this pin and

PGnd pin and be connected directly from this pin to the ground plane for noise free

operation.

Fault / Rt

Fb4

SEN

OUT

Gnd

Gate3

Fb3

Fb1

SEN

OCSet1

PGnd

LGate1

Phase1

UGate1

V12

Rev. 2.1

08/20/02

www.irf.com

IRU3007CWTR Related Products

	IRU3007CWTR	IRU3007CWPBF	IRU3007CW
Description	IC CTRL/REG SYNC BUCK 28-SOIC	DUAL SWITCHING CONTROLLER, 200kHz SWITCHING FREQ-MAX, PDSO28, PLASTIC, SOIC-28	IC CTRL/REG SYNC BUCK 28-SOIC
Is it Rohs certified?	-	conform to	incompatible
package instruction	-	SOP,	PLASTIC, SOIC-28
Reach Compliance Code	-	compliant	compliant
ECCN code	-	EAR99	EAR99
Analog Integrated Circuits - Other Types	-	DUAL SWITCHING CONTROLLER	DUAL SWITCHING CONTROLLER
Control Technology	-	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION
Nominal input voltage	-	5 V	5 V
JESD-30 code	-	R-PDSO-G28	R-PDSO-G28
JESD-609 code	-	e3	e3
length	-	17.83 mm	17.83 mm
Number of functions	-	1	1
Number of terminals	-	28	28
Maximum operating temperature	-	70 °C	70 °C
Package body material	-	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	-	SOP	SOP
Package shape	-	RECTANGULAR	RECTANGULAR
Package form	-	SMALL OUTLINE	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	-	NOT SPECIFIED	NOT SPECIFIED
Certification status	-	Not Qualified	Not Qualified
Maximum seat height	-	2.64 mm	2.64 mm
surface mount	-	YES	YES
Switch configuration	-	PUSH-PULL	PUSH-PULL
Maximum switching frequency	-	200 kHz	200 kHz
Temperature level	-	COMMERCIAL	COMMERCIAL
Terminal surface	-	Matte Tin (Sn)	Matte Tin (Sn)
Terminal form	-	GULL WING	GULL WING
Terminal pitch	-	1.27 mm	1.27 mm
Terminal location	-	DUAL	DUAL
Maximum time at peak reflow temperature	-	NOT SPECIFIED	NOT SPECIFIED
width	-	7.5 mm	7.5 mm
Base Number Matches	-	1	1

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