参数资料
| 型号： | BD30KA5WFP-E2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 10/18页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3V .5A TO252-5 |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 3V |
| 输入电压： | 最高 5.5V |
| 电压 - 压降（标准）： | 0.12V @ 200mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 500mA（最小值） |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-252-5，DPak（4 引线 + 接片），TO-252AD |
| 供应商设备封装： | TO-252-5 |
| 包装： | 标准包装 |
| 产品目录页面： | 1371 (CN2011-ZH PDF) |
| 其它名称： | BD30KA5WFP-E2DKR |
BDxxKA5 Series BDxxKA5W Series
BD00KA5W Series
Datasheet
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 I O in order to operate within the acceptable loss,
Vcc ： Input voltage
Vo ： Output voltage
Io ： Load current
Icca ： Circuit current
Io ≦
Pc – Vcc×Icca
Vcc － Vo
It is then possible to find the maximum load current Io MAX 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
BA10KA5WFP （ TO252-5 packaging ）
Io ≦
0.676 － 2.5×Icca
2.5-1.0
Io ≦ 440mA (Icca : 6mA)
θ ja=96.2 ℃ /W → -10.4mW/ ℃
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 μ F) 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
CTL
31.25k ?
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.
25k ?
Fig.23 Input equivalent circuit
www.rohm.com
? 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
10/15
TSZ02201-0R6R0A600150-1-2
26.Jun.2012 Rev.001
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