R1140Q151B-TR 查看數據表（PDF） - RICOH Co.,Ltd.

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R1140Q151B-TR

SC82 120mA LDO REGULATOR

RICOH Co.,Ltd. 

R1140Q

• ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE

Topt = 25°C

Output Voltage

VOUT (V)

Dropout Voltage

VDIF (V)

Condition

TYP.

MAX.

1.5 ≤ VOUT ≤ 1.6

0.36 0.70

1.7 ≤ VOUT ≤ 1.8

0.30 0.50

1.9 ≤ VOUT ≤ 2.0

IOUT = 120mA

0.28 0.45

2.1 ≤ VOUT ≤ 2.7

0.24 0.40

2.8 ≤ VOUT ≤ 4.0

0.18 0.30

TECHNICAL NOTES

When using these ICs, consider the following points:

Phase Compensation

In these ICs, phase compensation is made for securing stable operation even if the load current is varied. For this

purpose, be sure to use a 2.2µF or more capacitor COUT with good frequency characteristics and ESR (Equivalent Se-

ries Resistance).

(Note: When the additional ceramic capacitors are connected to the Output Pin with Output capacitor for phase com-

pensation, the operation might be unstable. Because of this, test these ICs with as same external components as ones

to be used on the PCB.)

PCB Layout

Make VDD and GND line sufficient. When the impedance of these is high, it would be a cause of picking up the noise

or unstable operation. Connect a capacitor with as much as 1.0µF capacitor between VDD and GND pin as close as pos-

sible.

Set external components, especially output capacitor as close as possible to the ICs and make wiring shortest.

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