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BD10KA5WF-E2 データシート(PDF) 10 Page - Rohm

部品番号 BD10KA5WF-E2
部品情報  500mA Variable/Fixed Output LDO Regulators Built-in thermal shutdown circuit
Download  18 Pages
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メーカー  ROHM [Rohm]
ホームページ  http://www.rohm.com
Logo ROHM - Rohm

BD10KA5WF-E2 データシート(HTML) 10 Page - Rohm

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Datasheet
10/15
BDxxKA5 Series
BDxxKA5W Series
BD00KA5W Series
TSZ02201-0R6R0A600150-1-2
© 2012 ROHM Co., Ltd. All rights reserved.
www.rohm.com
TSZ22111・15・001
26.Jun.2012 Rev.001
The calculation method for power consumption Pc(W) is as follows :
Pc = (Vcc-Vo)×Io+Vcc×Icca
Acceptable loss Pd≧Pc
Solving for the load current IO in order to operate within the acceptable loss,
Io≦
It is then possible to find the maximum load current IoMAX with respect to the applied voltage Vcc at the time of thermal design.
Calculation Example
Example 1) When Ta=85℃, Vcc=2.5V, Vo=1.0V
Io≦
θja=96.2℃/W → -10.4mW/℃
Io≦440mA (Icca : 6mA)
25℃=1300mW
→ 85℃=676mW
Please refer to the above information and keep thermal designs within the scope of acceptable loss for all operating
temperature ranges.
The power consumption Pc of the IC when there is a short circuit (short between Vo and GND) is :
Pc=Vcc×(Icca+Ishort)
*Ishort : Short
circuit current
●Terminal Vicinity Settings and Cautions
・Vcc Terminal
Please attach a capacitor (greater than 1
μF) between Vcc and GND.
The capacitance values differ depending on the application, so chose a capacitor with sufficient margin and verify the
operation on actual board.
・GND Terminal
Please be sure to keep the set ground and IC ground at the same potential level so that a potential difference does not
arise between them. If a potential difference arises between the set ground and the IC ground, the preset voltage will not
be output properly, causing the system to become unstable. Please reduce the impedance by making the ground patterns
as wide as possible and reducing the distance between the set ground and the IC ground as much as possible.
・CTL Terminal
The CTL terminal is turned ON at 2.0V and higher, and OFF at
0.8V and lower, within the operating power supply voltage range.
The power supply and the CTL terminal may be started up and
shut down in any order without problems.
Pc – Vcc×Icca
Vcc-Vo
0.676-2.5×Icca
2.5-1.0
BA10KA5WFP(TO252-5 packaging)
Fig.23 Input equivalent circuit
Vcc:
Vo:
Io:
Icca:
Input voltage
Output voltage
Load current
Circuit current
CTL
25k
31.25k


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