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IRU3004CFN/a16070avai5 Bit Prog SynchBuck CIC with Dual Adj Output LDO in a 20-Pin TSSOP package
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IRU3004CF ,5 Bit Prog SynchBuck CIC with Dual Adj Output LDO in a 20-Pin TSSOP packagefeaturesload loss-less current sensing by using the RDS(on) of the highMinimum Part Count, No Exter ..
IRU3004CF ,5 Bit Prog SynchBuck CIC with Dual Adj Output LDO in a 20-Pin TSSOP packageData Sheet No. PD94140IRU3004 5-BIT PROGRAMMABLE SYNCHRONOUS BUCK CONTROLLER IC WITH DUAL ..
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IRU3004CF-IRU3004CFTR-IRU3004CW-IRU3004CWTR
5 Bit Prog SynchBuck CIC with Dual Adj Output LDO in a 20-Pin TSSOP package
International
OR Rectifier
Data Sheet No. PD94140
IRU3004
5-BIT PROGRAMMABLE SYNCHRONOUS BUCK
CONTROLLER IC WITH DUAL LDO CONTROLLER
FEATU RES
Meets latest VRM 8. 4 specification for Pentiumlll
El Provides single chip solution for Vcore, GTL+ and
clock supply
El On-Board DAC programs the output voltage from
1.3V to 3.5V. The IRU3004 remains on for VID code
of (11111)
D Dual linear regulator controller on-board for 1.5V
GTL+ and 2.5V clock supplies
Loss-less Short Circuit Protection
Synchronous operation allows maximum efficiency
Patented architecture allows fixed frequency opera-
tion as well as 100% duty cycle during dynamic
D Minimum Part Count, No External Compensation
D Soft-Start Function
B High current totem pole driver for direct driving of the
external power MOSFET
D Power Good Function
APPLICATIONS
El Pentium III & next generation processor DC to DC
converter application
El Low Cost Pentium with AGP
DESCRIPTION
The IRU3004 controller IC is specifically designed to meet
Intel specifications for Pentium Ill", microprocessor
applications as well as the next generation P6 family
processors. The IC provides a single chip controller IC
for the Vcore, GTL+ and clock supplies required for the
Pentium III applications. The IRU3004 features a pat-
ented topology, 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 meeting
the latest VRM speefcation. The IRU3004 also features
loss-less current sensing by using the Row» of the high
side power MOSFET as the sensing resistor and a Power
Good window comparator that switches its open collec-
tor 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 pro-
grammable soft-start function as well as programming
the oscillator frequency by using an external capacitor.
I I PICAL APPLLCATION L2 Note: Pentium III is trademark of Intel Corp.
5V\ A W \
cs-i, g LU R16 R17 V0UT3
"ic', _ C7 C16 r
013;: C5: _ {1:02 R4 :010
R23 R3
R12 R13
T “' 1.
32Vr- -L c--
c4:: __cs VOUT1
12V HRW_18 h
V12 V5 CS+ HDrv cs. LOW Gnd VFE:
-C-ct Lin1
|RU3004
CzI-r SS VFB
ji---"---- D3 D2 D1 DO VFEZ PGd Lin2 r..,..-", L It ’VOUTZ
3.3V -
sm,,,)--"---] T"
VID3 )— R5 "it _
VlD2 )—
I/IDI )—
03;: PowerGood 7
Figure 1 - Typical application of the IRU3004.
PACKAGE ORDER INFORMATION
TA(°C) DEVICE PACKAGE
0 To 70 IRU3004CW 20-Pin Plastic SOIC (W)
0 To 70 IRU3004CF 20-Pin Plastic TSSOP (F)
Rev. 1.7 1
07l16l02
IRU3004
International
TOR Rectifier
ABSOLUTE MAXIMUM RATINGS
V5 Supply Voltage _................................................... 10V
V12 Supply Voltage _.................................................
Storage Temperature Range ......................................
-65°C To 150°C
Operating Junction Temperature Range ..................... 0°C To 125°C
PACKAGE INFORMATION
20-PIN WIDE BODY PLASTIC SOIC (W) 20-PIN PLASTIC TSSOP (F)
TOP VIEW TOP VIEW
01E Is,,,) ELinZ 01E C) EILinz
Lin1lZ Elna Lin1E Elna
VFB1E Elm VFB1E E01
vrezE E02 VFleZ E02
st Elna vslE E03
PGd E Elm PGdE Elm
cs-IZ EVFBa cs-IZ EVFBs
CS+ [E Ws cs-E Elss
HDrv IE Elva HDrvE Eve
Gnd E ELDrv GruC0 ELDW
BJA =85°C/\N 6JA =90°C/W
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 0.1 %
DAC Output Temp Variation 0.5 %
VID Input LO 0.4 V
VID Input HI 2 V
VID Input Internal PuII-Up 27 Kn
Resistor to V5
Power Good Section
Under-Voltage lower trip point Vow Ramping Down 0.89Vs 0.90Vs 0.91Vs V
Under-Voltage upper trip point Vow Ramping Up 0.92Vs V
UV Hysteresis 0.015Vs 0.02Vs 0.025Vs V
Over-Voltage upper trip point Vow Ramping Up 1.09Vs 1.10Vs 1.11Vs V
Over-Voltage lower trip point VOUT Ramping Down 1.08Vs V
OV Hysteresis 0.015Vs 0.02Vs 0.025Vs V
Power Good Output LO RL=3mA 0.4 V
Power Good Output HI RL=5K Pull-Up to 5V 4.8 V
Soft-Start Section
Soft-Start Current CS+=0V, CS-=5V 10 WA
Rev. 1.7
07I16I02
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