PA131XNL Datasheet, PDF (1/2 Pages) Pulse A Technitrol Company – Power Beads - PA131xNL Series Coupled Inductors

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:
• Output 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
Equivalent ¹
Transient
Inductance
per Phase
(nH)
Irated²
per
Phase
(Adc)
Magnetizing Inductance per Phase³
nH ±15%, 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
TYP MAX
PA1312NL
2
50
40 300 300
-
-
-
240 240
-
-
-
PA1313NL
3
PA1314NL
4
50
40 360 440 360 -
-
285 350 285 -
- _{0.425 0.5}
50
40 360 480 480 360
-
285 385 385 285 -
PA1315NL
5
50
40 360 460 480 460 360 285 365 385 365 285
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 induc-
tance 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 induc-
tor 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
.354
9,00
MAX
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
.732
18,60
.205
5,20
MAX
.217
5,50
.366
TAPE & REEL LAYOUT
9,30
L1
L2
1 23 4
.630
16,00
.559
14,20
1.260 ± .012
32.00 ± 0,30
USER DIRECTION OF FEED
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www.pulseeng.com
P636.A (11/05)