MITSUBISHI <Dig./Ana. INTERFACE>

M62222L/FP

2.7V FIXED OUTPUT VOLTAGE DC-DC CONVERTER

April 1996

( 3 / 3 )

Application Circuit (2.7V Output DC-DC Converter)

• Current Limit Detection:

When the voltage drop between pin 3 and pin 4 becomes more than 150mV,

the Current Limit Detection circuit begins operating. The peak switch

(fig.1), the current is limited to 1.5A.

2

1

3

4

5 IN

Vcc

CLM

Collector

GND

+

+

M62222

100µF

100µF

0.1

Ω

1K

Ω

1K

Ω

68µH

Fig.1 Example of the M62222L/FP application circuit

THE EXPRESSION OF CIRCUIT CONSTANTS

•VF

: Forward voltage drop of an external diode.

•Vsat : Output saturation voltage of an external switching transistor.

•

•An external transistor, diode and inductor should have a peak current capability of

greater than "Ipk".

CONSTANTS

1

1

fosc

fosc:110KHz(Vcc=5V)

EXPRESSIONS

Ipk

1 +

(

)

Io +

1

2

∆Io

0.15

Ipk