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IRU3007
5-BIT PROGRAMMABLE SYNCHRONOUS BUCK, NON-SYNCHRONOUS,ADJUSTABLE LDO AND 200mA ON-BOARD LDO
International
TOR Rectifier
Data Sheet No. PD94142
IRU3007
5-BIT PROGRAMMABLE SYNCHRONOUS BUCK, NON-SYNCHRO-
NOUS, ADJUSTABLE LDO AND 200mA ON-BOARD LDO
FEATU RES
EI Provides Single Chip Solution for Vcore, GTL+,
Clock Supply & 3.3V Switcher On-Board
EI 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 speaTca-
tion for Pentium ||TM
D On-Board DAC programs the output voltage from
1.3V to 3.5V
D Linear Regulator Controller On-Board for 1.5V
GTL+ supply
DESCRIPTION
The IRU3007 controller IC is specifically designed to meet
Intel specification for Pentium llTM 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
El Loss-less Short Circuit Protection that in combination with a few external components, as
D Synchronous Operation allows maximum efficiency shown in the typical application circuit, will provide in
El Patented architecture allows 5Ixed frequency excess of 14A of output current for an on-board DC/DC
operation as well as 100% duty cycle during converter while automatically providing the right output
dynamic load voltage via the 5-bit internal DAC. The IRU3007 also fea-
El Minimum Part Count tures, loss-less current sensing for both switchers by
D Soft-Start using the RDS(on) of the high-side power MOSFET as the
D High current totem pole drivers for directly driving sensing resistor, internal current limiting for the clock
the external Power MOSFETs supply, a Power Good window comparator that switches
D Power Good function monitors all outputs its open collector output low when any one of the out-
D Over-Voltage Protection circuitry protects the puts is outside of a pre-programmed window. Other fea-
switcher outputs and generates a fault output tures of the device are: Under-Voltage Lockout for both
[1 Thermal Shutdown 5V and 12V supplies, an external programmable soft-
start function, programming the oscillator frequency via
APPLICATIONS . an external resistor, Over-Voltage Protection (OVP) cir-
D Total 1o.wer Solution for Pentium ll processor cuitry for both switcher outputs and an internal thermal
application shutdown.
I I PICAL APPLICATION Note: Pentium II and Pentium Pro are trademarks of Intel Corp.
Sd - ' J
SVVITCHERZ I
CONTROL SVVlTCHER1 -
VOUT2 _ CONTROL VOUT1
IRU3007 ii If
til I 7 7
-"il LINEAR LINEAR - \ v 4
Vows ho CONTROL REGULATOR i OUT
Cl . . . . T
- Figure 1 - Typical application of IRU3007. -
PACKAGE ORDER INFORMATION
TA (°C) DEVICE PACKAGE
0 To 70 IRU3007CW 28-pin Plastic SOIC WB (W)
Rev. 2.1 1
08/20/02
International
IRU 3007 . .
TOR Rectifier
ABSOLUTE MAXIMUM RATINGS
V5 Supply Voltage _................................................... 7V
V12 Supply Voltage _................................................. 20V
Storage Temperature Range ...................................... -65°C To 150°C
Operating Junction Temperature Range ..................... 0°C To 125°C
PACKAGE INFORMATION
28-PIN WI DE BODY PLASTIC SOIC (W)
TOP VIEW
UGate2 E V Elva
PhaseZE Eusatm
VID4 E Ephasm
vnan EILGam
VI02E 24 PGnd
VID1 E EOCSen
VIDO E Evaem
PGood E ZIFM
OCSet2 E ENC
m E Elms
V5E Eleates
sslE Elena
Fault / RIE Elwyn
FME EVSENZ
OJA =80°C/W
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifcations apply over V12=12V, V5=5V and TA=0 to 70°C. Typical values refer
to TA=25°C. Low duty cycle pulse testing is used which keeps junction and case temperatures equal to the ambient
temperature.
PARAMETER SYM TEST CONDITION MIN TYP MAX UNITS
Supply UVLO Section
UVLO Threshold-12V Supply Ramping Up 10 V
UVLO Hysteresis-12V 0.4 V
UVLO Threshold-W Supply Ramping Up 4.3 V
UVLO Hysteresis-5V 0.3 V
Supply Current
Operating Supply Current V12 6 mA
Switching Controllers; Vcore (Vour1) and NO (Vour2)
VID Section (Vcore only)
DAC Output Voltage (Note 1) 0.99Vs Vs 1.01Vs V
DAC Output Line Regulation 0.1 %
DAC Output Temp Variation 0.5 %
VID Input LO 0.8 V
VID Input HI 2 V
VID Input Internal Pull-Up 27 kft
Resistor to V5
VF32 Voltage 2 V
Oscillator Section (Internal) KHz
Osc Frequency Rt=Open 200
2 Rev. 2.1
08/20/02
