NJM2870 查看數據表（PDF） - Japan Radio Corporation
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NJM2870 Datasheet PDF : 4 Pages
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NJM2870
s TYPICAL APPLICATION
x In the case where ON/OFF Control is not required:
VIN
VIN
VOUT
VOUT
+
0.1µF
NJM2870
+
4.7µF
R
(0 ∼ 300kΩ)
CONTROL
NOISE
BYPASS
GND
Cp=0.01µF
Connect control terminal(1Pin) to VIN terminal(5Pin)
In case a resistance “R” is used, the quiescent current will be decreased. However, the but minimum
operating voltage will be increase as well. Please refer to a figure of Output Voltage vs. Control Voltage.
y In use of ON/OFF CONTROL:
VIN
+
VIN
VOUT
VOUT
+
0.1µF
R
NJM2870
4.7µF
CONTROL
NOISE
BYPASS
GND
Cp=0.01µF
In case the control terminal is “H”, the output is enabled.
The control terminal is “L” or “open”, the output is disabled.
✱Noise bypass Capacitance Cp
Noise bypass capacitance Cp reduces noise generated by band-gap reference circuit.
Noise level and ripple rejection will be improved when larger Cp is used. Please refer to the typical
characteristics to determine the value.
Use of smaller Cp value may induce oscillation.
Please make sure to use Cp value of greater than 0.01uF to avoid the problem.
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