IR3504MPBF International Rectifier, IR3504MPBF Datasheet - Page 35
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IR3504MPBF
Manufacturer Part Number
IR3504MPBF
Description
IC CTRL XPHASE AMD SVID 32-MLPQ
Manufacturer
International Rectifier
Series
XPhase3™r
Datasheet
1.IR3504MTRPBF.pdf
(42 pages)
Specifications of IR3504MPBF
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
DESIGN EXAMPLE – AMD FIVE + ONE PHASE DUAL OUTPUT CONVERTER (FIGURE 17)
SPECIFICATIONS
Input Voltage: V
DAC Voltage: V
No Load Output Voltage Offset for output1: V
Output1 Current: I
Output2 Current: I
Output1 Over Current Limit: I
Output2 Over Current Limit: I
Output Impedance: R
Dynamic VID Slew Rate: SR=3.25mV/uS
Over Temperature Threshold: T
POWER STAGE
Phase Number: n1=5, n2=1
Switching Frequency: f
Output Inductors: L1=120 nH, L2=220 nH, R
Output Capacitors: POSCAPs, C=470uF, R
IR3500 EXTERNAL COMPONENTS
Oscillator Resistor R
Once the switching frequency is chosen, R
520kHz per phase, choose R
Soft Start Capacitor C
Determine the soft start capacitor from the required soft start time.
The soft start delay time is
The VR ready delay time is
The maximum over current fault latch delay time is
C
TD
TD
t
OCDEL
SS
1
3
/
DEL
=
=
=
C
C
Page 35
=
SS
2
SS
5 .
TD
/
I
/
DEL
DEL
CHG
*
Vboot
2
C
DAC
I
1 *
=12 V
( *
*
SS
O1
O1
I
1 .
I
. 3
/
=1.2 V
CHG
DEL
I
DISCHG
=95 ADC
=20 ADC
92
O1
CHG
=
ROSC
SW
SS/DEL
*
=0.3 m
0
=
−
1 .
. 0
=520 kHz
V
50
2
13
*
boot
*
limit1
limit2
OSC
10
*
10
=
10
−
MAX
−
−
6
=23.2k .
=115 ADC
= 25 ADC
1
2
3
−
1 *
5 .
1
) 1 .
6
*
=110 ºC
0 .
50
*
1 .
=
0
*
=
1 .
0
10
2
1 .
*
47
C
2 .
10
−
*
L1
ROSC
= 8m , Number Cn1=9, Cn2=5
O_NLOFST
6
mS
*
10
= 0.52m , R
−
10
=
6
−
*
0
6
50
−
can be determined from Figure 2. For switching frequency of
1 .
. 0
6
( *
uF
*
13
. 3
10
=15 mV
92
=
−
6
. 0
−
L2
1
691
= 0.47m
−
1
mS
) 1 .
=
3
6 .
mS
July 28, 2009
IR3504