R1114x

8

• ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE

Topt

= 25°C

Dropout Voltage

VDIF (V)

Output Voltage VOUT (V)

Condition

Typ.

Max.

VOUT

= 1.5

0.38

0.70

VOUT

= 1.6

0.36

0.65

VOUT

= 1.7

0.34

0.60

1.8 <

= VOUT <

= 2.0

0.32

0.55

2.1 <

= VOUT <

= 2.7

0.28

0.50

2.8 <

= VOUT <

= 4.0

IOUT

= 150mA

0.22

0.35

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, use a capacitor COUT with good frequency characteristics and ESR (Equivalent Series Resistance).

(Note: If additional ceramic capacitors are connected with parallel to the output pin with an output capacitor for

phase compensation, 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 lines sufficient. If their impedance is high, noise pickup or unstable operation may result.

Connect a capacitor with a capacitance value as much as 1.0

μF or more between VDD and GND pin, and as

close as possible to the pins.

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

short as possible.