IR3504MTRPBF International Rectifier, IR3504MTRPBF Datasheet - Page 2

• Manufacturer Part Number: IR3504MTRPBF
• Description: IC CTRL XPHASE3 SVID 32-MLPQ
• Manufacturer: International Rectifier
• Series: XPhase3™r

Specifications of IR3504MTRPBF

• Applications: Processor
• Current - Supply: 10mA
• Voltage - Supply: 4.75 V ~ 7.5 V
• Operating Temperature: 0°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: *
• Package: 32-Lead MLPQ
• Circuit: X-Phase Control IC
• Switch Freq (khz): 250kHz to 1.5MHz
• Pbf: PbF Option Available
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

APPLICATION CIRCUIT
PIN DESCRIPTION
PIN#
1
2
3
4
5
6
7
Power Good
Page 2
PWROK
ENABLE
SVC
SVD
12V
PIN SYMBOL
SS/DEL2
ENABLE
OCSET2
PWROK
VDAC2
SVD
IIN2
CVDAC2
RCP2
CCP22
SVD (Serial VID Data) is a bidirectional signal that is an input and open drain output
for both master (AMD processor) and slave (IR3504), requires an external bias
voltage and should not be floated
System wide Power Good signal and input to the IR3504. When asserted, the
IR3504 output voltage is programmed through the SVID interface protocol.
Connecting this pin to VCCL enables VFIX mode.
Enable input. A logic low applied to this pin puts the IC into fault mode. A logic high
on the pin enables the converter and causes the SVC and SVD input states to be
decoded and stored, determining the 2-bit Boot VID. Do not float this pin as the logic
state will be undefined.
Output 2 average current input from the output 2 phase IC(s). This pin is also used
to communicate over voltage condition to the output 2 phase ICs.
Programs output 2 startup and over current protection delay timing. Connect an
external capacitor to LGND to program.
Output 2 reference voltage programmed by the SVID inputs and error amplifier non-
inverting input. Connect an external RC network to LGND to program dynamic VID
slew rate and provide compensation for the internal buffer amplifier.
Programs the output 2 constant converter output current limit and hiccup over-
current threshold through an external resistor tied to VDAC2 and an internal current
source from this pin. Over-current protection can be disabled by connecting a
resistor from this pin to VDAC2 to program the threshold higher than the possible
signal into the IIN2 pin from the phase ICs but no greater than 5V (do not float this
pin as improper operation will occur).
ROCSET2
CCP21
CSS/DEL2
RVCCLDRV
RVDAC2
1
2
3
4
5
6
7
8
RFB22
Q1
RFB21
SVD
PWROK
ENABLE
IIN2
SS/DEL2
VDAC2
OCSET2
EAOUT2
CFB2
Figure 1 – IR3504 Application Circuit
RVCCLFB1
IR3504
CONTROL
IC
RVCCLFB2
CFB1
SS/DEL1
OCSET1
EAOUT1
RFB11
RFB13
VDRP1
VDAC1
ROSC
LGND
IIN1
RFB12
24
23
22
21
20
19
18
17
CVCCL
ROCSET1
RVDAC1
RCP1
ROSC
CDRP1
RDRP1
PIN DESCRIPTION
CCP12
CCP11
CSS/DEL1
CVDAC1
RTHERMISTOR1
12V
VCCL
PHSIN
PHSOUT
CLKOUT
ISHARE1
VDAC1
EAOUT1
VDD SENSE +
VDD SENSE -
EAOUT2
VDAC2
ISHARE2
VDDNB SENSE -
VDDNB SENSE +
Load Line
Thermistor;
Locate close to
VDD Power Stage
July 28, 2009
Phase Clock Input to
Last Phase IC of VDD
To Converters
To Phase IC
VCCL & GATE
DRIVE BIAS
3 Wire Analog
Control Bus
to VDD Phase
ICs
3 Wire Analog
Control Bus to
VDDNB Phase
ICs
2 wire
Digital
Daisy Chain
Bus to VDD
& VDDNB
Phase ICs
To VDD
Remote
Sense
To VDDNB
Remote
Sense
NTC
IR3504