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BD15HC0WEFJ Datasheet(PDF) 11 Page - Rohm

Part # BD15HC0WEFJ
Description  1A Fixed Output LDO Regulators
Download  21 Pages
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Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BD15HC0WEFJ Datasheet(HTML) 11 Page - Rohm

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BDxxHC0WEFJ
Datasheet
TSZ02201-0R6R0A600330-1-2
© 2012 ROHM Co., Ltd. All rights reserved.
www.rohm.com
TSZ22111・15・001
28.Dec.2012 Rev.002
●Power Dissipation
◎HTSOP-J8
Thermal design should ensure operation within the following conditions. Note that the temperatures listed are the allowed
temperature limits and thermal design should allow sufficient margin beyond these limits.
1. Ambient temperature Ta can be no higher than 85℃.
2. Chip junction temperature (Tj) can be no higher than 150℃.
Chip junction temperature can be determined as follows:
Most of the heat loss that occurs in the BDxxHC0WEFJ series is generated from the output Pch FET. Power loss is
determined by the total VCC-VO voltage and output current. Be sure to confirm the system input and output voltage as well as
the output current conditions in relation to the heat dissipation characteristics of the VCC and VO in the design. Bearing in
mind that heat dissipation may vary substantially depending on the substrate employed (due to the power package
incorporated in the BDxxHC0WEFJ series) make certain to factor conditions such as substrate size into the thermal design.
Power consumption [W] =
Input voltage (VCC) - Output voltage (VO) ×IO(Ave)
Example) Where VCC=5.0V, VO=3.3V, IO(Ave) = 0.1A,
Power consumption [W] =
5.0 V - 3.3V
×0.1A
=0.17[W]
Calculation based on ambient temperature (Ta)
Tj=Ta+θj-a×P
<Reference values>
1-layer substrate (copper foil density 0mm×0mm)
2-layer substrate (copper foil density 15mm×15mm)
2-layer substrate (copper foil density 70mm×70mm)
4-layer substrate (copper foil density 70mm×70mm)
Substrate size: 70mm×70mm×1.6mm (substrate with thermal via)
θj-a: HTSOP-J8 153.2℃/W
113.6℃/W
59.2℃/W
33.3℃/W
Measurement condition: mounted on a ROHM board,
and IC
Substrate size: 70mm × 70mm × 1.6mm
(Substrate with thermal via)
・Solder the thermal pad to Ground
① IC only
θj-a=249.5℃/W
② 1-layer(copper foil are :0mm×0mm)
θj-a=153.2℃/W
③ 2-layer(copper foil are :15mm×15mm)
θj-a=113.6℃/W
④ 2-layer(copper foil are :70mm×70mm)
θj-a=59.2℃/W
⑤ 4-layer(copper foil are :70mm×70mm)
θj-a=33.3℃/W
0
25
50
75
100
125
150
0
2.0
3.0
4.0
①0.50W
周囲温度:Ta [℃]
1.0
②0.82W
③1.10W
④2.11W
⑤3.76W
Ambient Temperature :Ta [℃]


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