ISL62883IRTZ Intersil, ISL62883IRTZ Datasheet - Page 25

• Manufacturer Part Number: ISL62883IRTZ
• Description: IC REG PWM 3PHASE BUCK 40TQFN
• Manufacturer: Intersil

Specifications of ISL62883IRTZ

• Applications: Controller, Intel IMVP-6.5™
• Voltage - Input: 5 V ~ 21 V
• Number Of Outputs: 1
• Voltage - Output: 0.0125 V ~ 1.5 V
• Operating Temperature: -40°C ~ 100°C
• Mounting Type: *
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Compensation & Current Sensing Network Design for Intersil Multiphase R^3 Regulators for IMVP-6.5
Jia Wei, [e-mail], 919-405-3605
Attention: 1. "Analysis ToolPak" Add-in is required. To turn on, go to Tools--Add-Ins, and check "Analysis ToolPak"
Changing the settings in red requires deep understanding of control loop design
Tune K i to get the desired loop gain bandwidth
Capacitance of Each Output Ceramic Capacitor:


Capacitance of Each Output Bulk Capacitor:
 



(This sets the over-current protection level)





(
(


ESR of Each Output Ceramic Capacitor:
2. Green cells require user input
ESL of Each Output Ceramic Capacitor:
Desired ISUM- Pin Current at Full Load:
Place the 2nd compensator pole fp2 at:
Number of Output Ceramic Capacitors:
Tune the compensator gain factor K i:
ESR of Each Output Bulk Capacitor:
(Recommended K i range is 0.8~2)
ESL of Each Output Bulk Capacitor:
Number of Output Bulk Capacitors:
Estimated Full-Load Efficiency:
(
(
Desired Load-Line Slope:
CPU Socket Resistance:
Loop Gain, Phase Curve
Controller Part Number:
Inductance Per Phase:
Loop Gain, Gain Curve
Switching Frequency:
)UHTXHQF\ +]
(
(
Full Load Current:
)UHTXHQF\ +]
Operation Parameters
Phase Number:
(
(
Vin:
Vo:
(
(
FIGURE 24. SCREENSHOT OF THE COMPENSATOR DESIGN SPREADSHEET
1.15
0.36
40.9
270
300
4.5
0.6
0.9
1.9
2.2
1.3
12
51
87
24
10
7 V
7 V
3
4
3
3
7 V
7 V
xfs
(
(
:
:
:
:
(Switching Frequency)

 


T1 Phase Margin:
Recommended Value
(
(










R1
R2
R3
C1
C2
C3
T1 Bandwidth:
Use User-Selected Value (Y/N)?
338.213
148.140
455.369
40.069
(
(
2.369
0.530
Output Impedance, Phase Curve
Output Impedance, Gain Curve
Compensator Parameters
212kHz
58.9°
:
:
:
Performance and Stability
(
(
)UHTXHQF\ +]
)UHTXHQF\ +]
(
(
T2 Phase Margin:
Z
User-Selected Value
T2 Bandwidth:
˜
˜
R1
R2
R3
C1
C2
C3
Z
§
¨
¨
©

˜
§
¨ ¨
©
(
S
(

0.536
S
2.37
·
¸
¸
¹
324
150
390
˜
39
§
¨
¨
©
·
˜ ¸ ¸
¹

§
¨ ¨
©
66kHz
89.3°
:
:
:
(
(
S

S
·
¸
¸
¹
·
¸ ¸
¹
Recommended Value
Current Sensing Network Parameters
Cn
Inductor DCR
Ri
606.036
Rsum
Rntcs
0.406
Operation Parameters
Rntc
Rp
:
0.88
3.65
2.61
10
11
:
:
:
:
:
User Selected Value
Cn
Ri
0.406
604
: