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BAXXJC5 数据表(PDF) 6 Page - Rohm

部件名 BAXXJC5
功能描述  1.5A Secondary LDO Regulators for Local Power Supplies
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制造商  ROHM [Rohm]
网页  http://www.rohm.com
标志 ROHM - Rohm

BAXXJC5 数据表(HTML) 6 Page - Rohm

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BA□□JC5 Series,BA00JC5W Series
Technical Note
6/9
www.rohm.com
2009.04 - Rev.A
© 2009 ROHM Co., Ltd. All rights reserved.
Operation Notes
 Vcc pin
Insert a capacitor (0.33
F approx.) between VCC 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 pin
The CTL pin 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 pins on or off.
Fig.18 Input Equivalent Circuit
Vo pin
Insert a capacitor between the Vo and GND pins in order to prevent output oscillation.
Fig.19 Output Equivalent Circuit
Fig. 20 IO vs ESR
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. 20 and operate the IC within the stable
region. Use a capacitor within a capacitance between 22
F and 1,000F.
31 k
2 k
27 k
CTL
OUT
22 F
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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