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IRU3013CW-IRU3013CWTR
5 Bit Prog in a 24-Pin QSOP(Q) package
International
TOR Rectifier
Data Sheet No. PD94249
IRU3013
VRM 8.5 COMPATIBLE 5-BIT PROGRAMMABLE SYNCHRONOUS
BUCK CONTROLLER IC WITH TRIPLE LDO CONTROLLER
FEATU RES
Meets Latest VRM 8.5 Specification
Provides Single Chip Solution for Vcore, 1.2V AGTL+,
1.8V and VDDQ
On-Board 5-Bit DAC and Decoder programs the out-
put voltage from 1.050V to 1.825V
Loss-less Short Circuit Protection
Synchronous operation allows maximum efficiency
Patented architecture allows fixed frequency opera-
tion as well as 100% duty cycle when operating with
a changing load
Minimum Part Count, No External Compensation
Soft-Start
High current totem pole driver for directly driving an
external Power MOSFET
Power Good Function
APPLICATIONS
D Pentium III with VRM 8.5 SpeciMation
B DC to DC Converters
DESCRIPTION
The IRU3013 controller IC is specifcally designed for
Intel Pentium |||TM microprocessor applications as de-
scribed in the VRM 8.5 specification. The IC provides
a single chip solution for the Vcore, 1.2V AGTL+,
1.8V and a third uncommitted LDO controller that
can be used either as 1.2V power good detector or
to provide 1.5V AGP bus in applications that this
voltage is required. The IRU3013 features a patented
topology that, in combination with a few external com-
ponents, (*Note: See application current in Figure 3) will
provide in excess of 30A of output current for an on-
board Vcore synchronous converter while automatically
providing the output voltage specified in VRM 8.5 speci-
Mation. The IRU3013 also features, loss-less current
sensing by using the RDS(0N) of the high side Power
MOSFET as the sensing resistor, a Power Good win-
dow comparator that switches its open collector output
low when the output is outside of a i10% window. Other
features of the device are: Under-voltage lockout for both
5V and 12V supplies, an external programmable soft-
start function, and the ability to program the oscillator
frequency by connecting an external capacitor.
TYPICAL APPLICATION
VRM 15 VID 5V
"I/tirc-o-L, j l
fl l LINEAR
T I CONTROL SWITCHER
Vomz f-- + CONTROL
: IRU3013
I LINEAR LINEAR
Vows + CONTROL CONTROL
Figure 1 - Typical application of IRU3013.
Note: Pentium III is trade mark of Intel Corp.
PACKAGE ORDER INFORMATION
TA (°C) DEVICE PACKAGE
0 To 70 IRU3013CQ 24-Pin Plastic QSOP NB (Q)
0 To 70 |RU3013CW 24-Pin Plastic SOIC WB (W)
Rev. 1.4 1
08/20/02
IRU3013
International
TOR Rectifier
ABSOLUTE MAXIMUM RATINGS
V5 Supply Voltage _................................................... 10V
V12 Supply Voltage _.................................................
All Other Pins
Storage Temperature Range ......................................
-65°C To 150°C
Operating Junction Temperature Range ..................... 0°C To 125°C
PACKAGE INFORMATION
24-PIN PLASTIC QSOP (Q)
Ct II 0 El Lin2
Lin1 E EDD
VFB1 IE El D1
VFBZE E] D2
VSE a D3
OVP IE E D25
PGd E El WB3
cs/E El ss
CS+E E Lin4
HDrVE Cs] VFB4
PGndE Gl v12
GndE Es] LDrv
GJA =88°CNV
24-PIN WIDE BODY PLASTIC SOIC (W)
Ct E U El Lin2
Lin1 E Elm
VFB1 E Ed D1
VFBZE El D2
VSE El D3
OVP [E E D25
PGd E E] VFBS
cs/E El ss
cs/E El Lin4
HDrVIE El VFBA
PGndE El v12
GndE El LDrv
9JA=80°CNV
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications 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
VID Section
DAC Output Voltage (Note 1) 0.98Vs Vs 1.02Vs V
DAC Output Line Regulation 4.5
10.5DAC Output Temp Variation 0.5 %
VID Input LO 0.4 V
VID Input HI 2 V
VID Input Internal Pull-up
Resistor to 5V 27 Kn
Power Good Section
Under-Voltage Lower Trip Point Vour Ramping Down 0.90Vs V
Under-Voltage Upper Trip Point Vow Ramping Up 0.92Vs V
UV Hysteresis 0.02Vs V
Over-Voltage Upper Trip Point VouT Ramping Up 1.10Vs V
Over-Voltage Lower Trip Point Vow Ramping Down 1.08Vs V
OV Hysterises 0.02Vs V
Power Good Output LO RL-- 3mA 0.3 v
Power Good Output HI RL-- 5K PuII-Up to 5V 4.95 V
Soft-Start Section
Soft-Start Current CS+ = 0V, CS- = 5V 10 wA
Rev. 1.4
08/20/02
