BDXXKA5-E Datasheet, PDF(10/18 Page) Rohm – low-saturation regulators that are available for output currents up to 500mA.

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BDXXKA5-E Datasheet, PDF (10/18 Pages) Rohm – low-saturation regulators that are available for output currents up to 500mA.

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BDxxKA5 Series BDxxKA5W Series BD00KA5W Series

Datasheet

The calculation method for power consumption Pc(W) is as follows :

Pc = (Vcc-Vo)ÃIo+VccÃIcca

Acceptable loss Pdâ§Pc

Solving for the load current IO in order to operate within the acceptable loss,

Vccï¼Input voltage

Voï¼Output voltage

Ioï¼Load current

Iccaï¼Circuit current

Ioâ¦

Pc â VccÃIcca

Vccï¼Vo

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=85â, Vcc=2.5V, Vo=1.0V

Ioâ¦

0.676ï¼2.5ÃIcca

2.5-1.0

Ioâ¦440mA (Icca : 6mA)

BA10KA5WFPï¼TO252-5 packagingï¼

Î¸ja=96.2â/W â -10.4mW/â

25â=1300mW â 85â=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=VccÃ(Icca+Ishort)

*Ishort : Short circuit current

âTerminal Vicinity Settings and Cautions

ã»Vcc Terminal

Please attach a capacitor (greater than 1Î¼F) 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.

ã»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.

ã»CTL Terminal

31.25kâ¦

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.

CTL

The power supply and the CTL terminal may be started up and

shut down in any order without problems.

25kâ¦

Fig.23 Input equivalent circuit

www.rohm.com

TSZ22111ï½¥15ï½¥001

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TSZ02201-0R6R0A600150-1-2

26.Jun.2012 Rev.001

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