Document
SMT POWER INDUCTORS
Power Beads - PA131xNL Series Coupled Inductors
Two, three, four and five phase Coupled Inductors for VR10/VR11 applications
For use only with Volterra VT1105M ®, VT1115M ® chipsets
Coupled Inductors enable:
• Phase ripple current reduction due to AC magnetic field cancellation within the inductor core
• Improved efficiency due to lower peak currents • Reduction in required output capacitance • Faster transient response due to the ability to use lower
effective inductance values • Reduced overshoot/undershoot during load transients • Frequency range up to 2MHz
Electrical Specifications @ 25°C — Operating Temperature -40°C to +130°C
Pulse Part No.
Number of
Coupled Phases
Equivalent1 Transient Inductance per Phase
(nH)
Irated2 per
Phase (Adc)
Magnetizing Inductance per Phase3 nH ±20%, 0Adc
L1 L2 L3 L4 L5 (1-2) (3-4) (5-6) (7-8) (9-10)
Magnetizing Inductance per Phase4 nH MIN, 5Adc
L1 L2 L3 L4 L5 (1-2) (3-4) (5-6) (7-8) (9-10)
DCR/Phase5 (mΩ)
TYP MAX
PA1312NL
2
50
40 310 310
-
-
-
240 240
-
-
-
PA1313NL PA1314NL
3 4
50
40 370 450 370 -
- 285 350 285 -
- 0.425 0.5
50
40 370 490 490 370
-
285 385 385 285 -
PA1315NL
5
50 40 370 470 490 470 390 285 365 385 365 285
NOTES: 1. In a non-coupled multi-phase topology, the power supply sees the same induc-
tance during transient and steady-state conditions. As a result, any attempt to lower the inductance to improve transient response has the negative result of increasing ripple and peak currents throughout the system during steady-state operation. However, in a coupled inductor multi-phase topology, the interaction of magnetic fields from each phase enables an overall reduction in ripple current during steady-state operation and a lower equivalent inductance during transient operation. The equivalent transient inductance per phase, as listed, represents the actual value of inductance that would be required in an non-coupled topology to realize the same transient performance. This value is achieved by core and winding geometry and is not directly measured by Pulse. For more information on the operation of the coupled inductor topology, please contact Volterrra.
2.The rated current per phase is based on Volterra's testing of the Pulse coupled inductors.
3.The magnetizing inductance per phase is the measured inductance (at 0Adc) across each phase when all other phases are open-circuit. This inductance is a Pulse production measurement. Although the equivalent inductance per phase during steady-state is significantly higher then the equivalent transient inductance as listed, it should not be confused with the magnetizing inductance.
4.The magnetizing inductance per phase is the measured inductance (at 5Adc) across each phase when all other phases are open-circuit. This inductance is a Pulse production measurement. This test is performed to verify that the inductor can withstand a phase-to-phase load imbalance of 5Adc without saturating.
5.The nominal value of DCR/phase is for reference only. For production testing, the maximum limit is used.
6.The VT1105M ® and VT1115M ® are registered trademarks of Volterra Semiconductor Corporation.
Mechanical
Schematic
PA1312NL
1.782,209MAX
PA1312NL Date Code Country of Origin 1 23 4
.354 9,00 MAX
.354 9,00
Weight . . . . . . . . . . .3.0 grams Tape & Reel . . . . . . . .650/reel Tray . . . . . . . . . . . . . . .60/tray Dimensions: Inches
mm Unless otherwise specified, all tolerances are ± .010
0,25
4X
.134 3,40
2X
.193 4,90
SUGGESTED PAD LAYOUT
.205 5,20 MAX
.732 18,60 .217 5,50
TAPE & REEL LAYOUT
.366 9,30
L1 L2 1 23 4
.630 16,00
.559 14,20 1.260 ± .012 32.00 ± 0,30
USER DIRECTION OF FEED
USA 858 674 8100 • Germany 49 7032 7806 0 • Singapore 65 6287 8998 • Shanghai 86 21 54643211 / 2 • China 86 755 33966678 • Taiwan 886 3 4641811
www.pulseeng.com
53
SPM2007 (11/07)
SMT POWER INDUCTORS
Power Beads - PA131xNL Series Coupled Inductors
PA1313NL
12.70,7300MAX
PA1313NL
Date Code
Country of Origin
1 23 45 6
Mechanical
Schematic
.354 9,00 MAX
2X
.354 9,00
=
.709 18,00
6X
.134 3,40
Weight . . . . . . . . . . .4.5 grams Tape & Reel . . . . . . . .650/reel Tray . . . . . . . . . . . . . . .45/tray
L1 L2 L3 1 23 4 5 6
.354 9,00
SUGGESTED PAD LAYOUT
3X
.193 4,90
.205 5,20 MAX
.004/0,10 6 SURFACES
1.087 27,60 .217 5,50
TAPE & REEL LAYOUT
.366 9,30
.795 ± .006 20.20 ± 0,15
1.732 ± .012 44.00 ± 0,30
.630 16,00
USER DIRECTION OF FEED
PA1314NL
13.64,4508MAX
8X
.134 3,40
3X
.354 9,00
=
1.063 27,00
PA1314NL
Date Code
Country of Origin
.354 9,00 MAX
1 23 45 67 8
.354 9,00
4X
.193 4,90
SUGGESTED PAD LAYOUT
.205 5,20 MAX
.004/0,10 8 SURFACES
Weight . . . . . .6.0 grams Tape & Reel . . .550/reel Tray . . . . . . . . . .30/tray
L1 L2 L3 L4 1 23 4 5 67 8
1.453 36,90
.217 TAPE & REEL .366
5,50
LAYOUT
9,30
.630 16,00
1.031 ± .006 26.20 ± 0,15
2.205 ± .012 56.00 ± 0,30
USER DIRECTION OF FEED
PA1315NL
14.58,0702MAX
10X
.134 3,40
.