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BA80BC0FP-E2 Datasheet(PDF) 9 Page - Rohm

Part # BA80BC0FP-E2
Description  1A Variable/Fixed Output LDO Regulators
Download  19 Pages
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Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BA80BC0FP-E2 Datasheet(HTML) 9 Page - Rohm

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BAxxBC0 Series
BAxxBC0W Series
BA00BC0WCP-V5
Datasheet
TSZ02201-0R6R0A600120-1-2
TSZ22111・15・001
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
26.Jun.2012 Rev.001
31kΩ
2kΩ
27kΩ
CTL
Refer to the above and implement proper thermal designs so that the IC will not be used under excessive power dissipation
conditions under the entire operating temperature range.
The power consumption Pc of the IC in the event of shorting (i.e. the Vo and GND pins are shorted) can be obtained from
the following equation:
Pc = Vcc
× (Icca + Ishort) (Ishort: short current).
●Peripheral Circuit Considerations
• Vcc pin
Insert a capacitor (0.33
μF approx.) between V
CC and GND.
The capacitance will vary depending on the application. Use a suitable capacitance and implement designs with
sufficient margins.
• GND pin
Verify that there is no potential difference between the ground of the application board and the IC.
If there is a potential difference, the set voltage will not be output accurately, resulting in unstable IC operation.
Therefore, lower the impedance by designing the ground pattern as wide and as short as possible.
• CTL terminal
The CTL terminal turns on at an operating power
supply voltage of 2.0 V or higher and turns off at 0.8 V
or lower.
There is no particular order when turning the power
supply and CTL terminals on or off.
Fig.20 Input Equivalent Circuit
●Vo Terminal
Insert a capacitor between the Vo and GND pins in order to prevent output oscillation.
Fig.21 Output Equivalent Circuit
Fig.22 ESR vs. IO (22μF)
The capacitance may vary greatly with temperature changes, thus making it impossible to completely prevent oscillation.
Therefore, use a tantalum aluminum electrolytic capacitor with a low ESR (Equivalent Serial Resistance). The output will
oscillate if the ESR is too high or too low, so refer to the ESR characteristics in Fig.22 and operate the IC within the stable
region. Use a capacitor within a capacitance between 22
μF and 1,000μF.
Below figure, it is ESR-to-Io stability Area characteristics, measured by 22
μF-ceramic-capacitor and resistor connected in series.
This characteristic is not equal value perfectly to 22µF-aluminum electrolytic capacitor in order to measurement method.
Note, however, that the stable range suggested in the figure depends on the IC and the resistance load involved, and can
vary with the board’s wiring impedance, input impedance, and/or load impedance. Therefore, be certain to ascertain the
final status of these items for actual use.
Keep capacitor capacitance within a range of 22µF to 1000
μF. It is also recommended that a 0.33μF bypass capacitor be
connected as close to the input pin-GND as location possible. However, in situations such as rapid fluctuation of the input
voltage or the load, please check the operation in real application to determine proper capacitance.
OUT
22 μF
IC
200
400
600
800
1000
0
0.05
0.075
0.1
0.2
0.5
1.0
2.0
Io [mA]
Oscillation region
Oscillation region
Stable region
10.0


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