NJM2871 データシートの表示（PDF） - Japan Radio Corporation

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NJM2871

LOW DROPOUT VOLTAGE REGULATOR

Japan Radio Corporation  

NJM2871/A, NJM2872/A

s TYPICAL APPLICATION

x In case that ON/OFF Control is not required:

VIN

VIN

VOUT

0.1uF

R

(0∼300kΩ)

CONTROL

NOISE

BYPASS

GND

VOUT

1.0uF *note1

(ceramic)

Cp=0.01uF

*note1 2.0V < Vo ≤ 2.6V version : Co=2.2uF(ceramic)

Vo ≤ 2.0V version : Co=4.7uF(ceramic)

Connect control terminal to VIN terminal

The quiescent current can be reduced by using a resistance “R”. Instead, it increases the minimum

operating voltage. For further information, please refer to Figure “Output Voltage vs. Control Voltage”.

y In use of ON/OFF CONTROL:

VIN

VIN

VOUT

VOUT

0.1uF

R

CONTROL

NOISE

BYPASS

GND

1.0uF *note1

(ceramic)

Cp=0.01uF

*note1 2.0V < Vo ≤ 2.6V version : Co=2.2uF(ceramic)

Vo ≤ 2.0V version : Co=4.7uF(ceramic)

State of control terminal:

•“H”→ output is enabled.

• “L” or “open” → 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.

Use of smaller Cp value may cause oscillation.

Use the Cp value of 0.01uF greater to avoid the problem.

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