MITSUMI

1000mA Regulator MM166

F

Application Circuit

NC

12

GND

3

7

6

NC NC

Cn

4

Cont

8

5

1.0

µF

0.1

µF

2.2

µF

Ceramic

Ceramic

Input

To load

Cn=470pF

Ceramic

Note

1. The output capacitor is required between output and GND to prevent oscillation.

2. The ESR of capacitor must be defined in ESR stability area.

3. The wire of Vcc and GND is required to print full ground plane for noise and stability.

4. The input capacitor must be connected a distance of less than 1cm from input pin.

5. The capacitor is connected to Cn must have low leakage current characteristics, because Cn pin is high

impedance.

6. In case the output voltage is above the input voltage, the overcurrent flow by internal parasitic diode from

output to input. In such application, the external bypass diode must be connected between output and

input pin.

GND

1

3

2

1.0

µF

Ceramic

0.1

µF

2.2

µF

About Power dissipation

This IC's GND pin and Heat Spreader Bottom effectively radiate heat. By increasing these copper foil pattern

area of PCB, Power dissipation improves. Please kindly desigh PCB pattern taking care of above features

about power dissipation.

Power Dissipation

0

500

1000

1500

2000

2500

3000

0

25

50

75

100

125

150

Ambient Temperature(˚C)

HSOP-8 : 37mm

37mm

1.6mm

Double sided glass epoxy

Copper plane 80%

To-252 : 150mm

100mm

1.0mm

Double sided glass epoxy

Copper plane 80%