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International Rectifier Electronic Components Datasheet

IRU3007 Datasheet

5-BIT PROGRAMMABLE SYNCHRONOUS BUCK CONTROLLER IC

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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
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
APPLICATIONS
Total Power Solution for Pentium II processor
application
DESCRIPTION
The IRU3007 controller IC is specifically designed to meet
Intel specification for Pentium IImicroprocessor 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 RDS(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.
TYPICAL APPLICATION
5V
Note: Pentium II and Pentium Pro are trademarks of Intel Corp.
VO U T 2
SWITCHER2
CONTROL
IRU3007
SWITCHER1
CONTROL
VO U T1
VO U T 3
LINEAR
CONTROL
LINEAR
REGULATOR
Figure 1 - Typical application of IRU3007.
PACKAGE ORDER INFORMATION
TA (°C)
0 To 70
DEVICE
IRU3007CW
PACKAGE
28-pin Plastic SOIC WB (W)
Rev. 2.1
08/20/02
www.irf.com
VO U T4
1


International Rectifier Electronic Components Datasheet

IRU3007 Datasheet

5-BIT PROGRAMMABLE SYNCHRONOUS BUCK CONTROLLER IC

No Preview Available !

IRU3007
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 WIDE BODY PLASTIC SOIC (W)
UGate2 1
Phase2 2
VID4 3
VID3 4
VID2 5
VID1 6
VID0 7
PGood 8
OCSet2 9
Fb2 10
V5 11
SS 12
Fault / Rt 13
Fb4 14
TOP VIEW
28 V12
27 UGate1
26 Phase1
25 LGate1
24 PGnd
23 OCSet1
22 VSEN1
21 Fb1
20 NC
19 Fb3
18 Gate3
17 Gnd
16 VOUT4
15 VSEN2
uJA =808C/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
Supply UVLO Section
UVLO Threshold-12V
Supply Ramping Up
UVLO Hysteresis-12V
UVLO Threshold-5V
Supply Ramping Up
UVLO Hysteresis-5V
Supply Current
Operating Supply Current
V12
V5
Switching Controllers; Vcore (VOUT1) and I/O (VOUT2)
VID Section (Vcore only)
DAC Output Voltage (Note 1)
DAC Output Line Regulation
DAC Output Temp Variation
VID Input LO
VID Input HI
VID Input Internal Pull-Up
Resistor to V5
VFB2 Voltage
Oscillator Section (Internal)
Osc Frequency
Rt=Open
MIN TYP MAX UNITS
10 V
0.4 V
4.3 V
0.3 V
6 mA
30
0.99Vs Vs 1.01Vs V
0.1 %
0.5 %
0.8 V
2V
27 KV
2V
KHz
200
2 www.irf.com
Rev. 2.1
08/20/02


Part Number IRU3007
Description 5-BIT PROGRAMMABLE SYNCHRONOUS BUCK CONTROLLER IC
Maker International Rectifier
Total Page 17 Pages
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