PC500.B (5/02) 18
US 858 674 8100
••
UK 44 1483 401 700
••
France 33 3 84 35 04 04
••
Singapore 65 287 8998
••
Taiwan 886 2 2698 0228
••
Hong Kong 852 2788 6588
••
http://www.pulseeng.com
Reliable self-leaded design
Very small size and cost-effective
High energy storage and low DC resistance
Ideal for DC/DC conversion in notebook computers,
PDAs, step-up or step-down converters
Electrical Specifications @ 25°C — Operating Temperature -40°C to +130°C
Reference Values Control Values Calculation Data
L @ IDC L W/O DC DCR
Pulse IDC MIN ET ±15% ±15% ET10
Part Number (amp) (µH) (V-µsec) (µH) (mΩ)(V-µsec)
ROS 1
P0430T 2.00 0.51 0.8 0.7 14 476.2
P0431T 1.90 0.76 0.8 1.1 18 370.4
P0432T 1.50 0.85 1.2 1.1 18 370.4
P0433T 1.20 1.44 1.8 1.9 28 277.8
P0434T 1.20 1.87 1.8 2.6 34 238.1
P0435T 1.00 2.72 2.3 3.9 40 196.1
P0436T 0.70 4.33 3.1 6.0 73 158.7
P0437T 0.60 5.35 3.3 7.1 100 144.9
P0438T 0.50 8.84 4.4 12.2 140 111.1
P0439T 0.45 10.79 5.0 14.7 155 101.0
P0440T 0.34 17.59 6.5 23.8 250 79.4
P0441T 0.29 25.50 8.4 33.8 280 66.7
P0442T 0.24 35.80 9.8 49 440 55.6
P0443T 0.20 52.70 12 72 650 45.7
P0444T 0.17 79 14 110 1050 37.0
P0445T 0.16 88 15 122 1065 35.1
P0446T 0.14 127 18 179 1600 29.0
ROS 2
P0450T 5 0.51 3.0 0.64 7.6 181.8
P0451T 5 0.67 3.1 0.86 8.7 151.5
P0452T 5 1.09 0.5 1.5 11.4 113.6
P0453T 5 1.53 1.0 2.3 13 90.9
P0454T 3 1.78 7.5 2.3 15 90.9
P0455T 2.5 3.74 10.5 5.13 23 60.6
P0456T 2 4.76 13 6.3 26 56.8
P0457T 1.8 5.61 14 7.5 33 50.5
P0458T 1.5 9.09 15 13.2 70 39.5
P0459T 1.3 11.47 21 15.5 60 35.0
P0460T 1 22.95 31 34 90 24.6
P0461T 0.9 39.10 39 57.2 123 18.9
P0462T 0.8 40.80 35 62.5 240 18.2
P0463T 0.6 69.70 55 100 245 14.0
P0464T 0.5 76.50 54 103 305 14.2
P0465T 0.4 137 78 180 481 10.0
P0466T 0.35 182 87 254 682 8.7
P0467T 0.3 272 105 380 1030 7.0
P0468T 0.25 357 130 500 1200 6.1
MINIATURE SURFACE MOUNT
POWER INDUCTORS
19 PC500.B (5/02)
US 858 674 8100
••
UK 44 1483 401 700
••
France 33 3 84 35 04 04
••
Singapore 65 287 8998
••
Taiwan 886 2 2698 0228
••
Hong Kong 852 2788 6588
••
http://www.pulseeng.com
1. Temperature rise is 55° C in typical buck or boost circuits with the rated IDC
current and reference ET applied to the inductor.
2. Total loss in the inductor is 80 mWatts (ROS 1) and 280 mWatts (ROS 2)
for 55°C temperature rise above ambient.
3. To estimate temperature rise in a given application, you must determine the
total losses (copper losses + core losses) and apply the following formula:
ROS 1: TempRise (C) = (Total Losses (mW)).833 x 1.45
ROS 2: TempRise (C) = (Total Losses (mW)).833 x .508
4. To determine copper losses, calculate:
CopperLoss (mW) = IDC2 x DCR
5. For core loss in mWatts, using frequency f (in Hz) and operating
flux density B (in Gauss), calculate:
ROS 1: CopperLoss (mW) = .127 x 10-10 x f1.26 x B2.11
ROS 2: CopperLoss (mW) = .887 x 10-10 x f1.26 x B2.11
6. For flux density (B), calculate ET (V-µsec) for the application,
and multiply by ET10 factor from the table.
A
MAX
G
F
E
B
MAX
C
D
Suggested Pad Layout
F
1
2
Mechanical Schematic
Notes:
ROS 1 ROS 2
Weight ....................0.29 grams .............1.1 grams
Tape & Reel...............2000/reel ................600/reel
PKG A B C D E F G
ROS 1 .335 .225 .125 .250 .100 .050 .250
8,51 5,72 3,18 6,35 2,54 1,27 6,35
ROS 2 .545 .390 .215 .440 .120 .065 .440
13,84 9,91 5,46 11,18 3,05 1,65 11,18
MINIATURE SURFACE MOUNT
POWER INDUCTORS
Dimensions: Inches
mm
Unless otherwise specified, all tolerances are ± .010
0,25
