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

Io≦

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

Ω

31.25k

Ω