IR3523MTRPBF International Rectifier, IR3523MTRPBF Datasheet - Page 30

• Manufacturer Part Number: IR3523MTRPBF
• Description: IC XPHASE3 CTLR VR11.1 40-MLPQ
• Manufacturer: International Rectifier
• Series: XPhase3™r

Specifications of IR3523MTRPBF

• 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: 40-MLPQ
• Ic Function: Dual Output Control IC
• Supply Voltage Range: 4.75V To 7.5V
• Operating Temperature Range: 0°C To +150°C
• Digital Ic Case Style: MLPQ
• No. Of Pins: 40
• Controller Type: XPhase
• Rohs Compliant: Yes
• Package: 40-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

CURRENT SHARE LOOP COMPENSATION
The internal compensation of current share loop ensures that crossover frequency of the current share loop is at least
one decade lower than that of the voltage loop so that the interaction between the two loops is eliminated.
DESIGN EXAMPLE – THREE PHASE (DDR) AND ONE PHASE (VTT) CONVERTER
(FIGURE 16)
SPECIFICATIONS:
Input Voltage: V
DAC1 Voltage: V
DAC2 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
Output1 Impedance: R
Dynamic VID Slew Rate Rise: SR = 3.25mV/uS
Over Temperature Threshold: T
POWER STAGE:
Phase Number: n1 = 1, n2 = 3
Switching Frequency: f
Output Inductors: L1 = 150 nH, L2 = 90nH, R
Output Capacitors: Ceramics, C = 22uF, R
Output Capacitors: Ceramics, C = 10uF, R
Oscillator Resistor R
Once the switching frequency is chosen, R
kHz per phase, choose R
Page 30 of 37
I
= 12 V
DAC1
DAC2
O1
O2
C
R
FB
FB
= 28A DC
= 85A DC
1
= 1.22 V
= 1.5 V
ROSC
O1
SW
=
=
2
OSC
= 6.0 m
2
π
= 750 kHz
π
∗
∗
limit1
limit2
f
= 15.8 k .
K
C
f
C
MAX
∗
∗
1
R
=42A DC
= 125A DC
K
FB
= 110 ºC
∗
C
FB
C
C
ROSC
= 1.5 m , Number Cn1 = 15, Cn2 = 6
= 1 m , Number Cn1 = 0, Cn2 = 70 (10 per DIMM)
L1
O_NLOFST
= 0.47m , R
can be determined from Figure 2. For switching frequency of 750
= 20 mV
L2
= 0.47m
June 20, 2008
(36)
(37)
IR3523