NOTES:

Continuous operation above the absolute maximum ratings may adversly effect the device performance and/or life cycle.

EQUIVALENT SCHEMATIC

Isolated Step Down Power Supply

Microprocessor Power Source

Low Voltage Subsystem Power Source

TYPICAL APPLICATIONS

1

2

3

4

5

6

+Input

Shutdown Plus

Clock

Adjust/Comp

-Output

+Output

PIN-OUT INFORMATION

-Input

Timing 2

Timing 1

Case

-Sense

+Sense

12

11

10

9

8

7

-65°C to +150°C

300°C

See Efficiency Curve

150°C

6.5°C/W

ABSOLUTE MAXIMUM RATINGS

+50V

80V

5.5A

4.0A

1.9A

1.5A

-55°C to +125°C

-40°C to +85°C

Input Voltage (pin 7 to pin 6)

Input Transient (pin 7 to pin 6 @ 50mS)

Output Current

BBF2803S

BBF2805S

BBF2812S

BBF2815S

Case Temperature Range

BBF2800S H/E

BBF2800S

Storage Temperature Range

Lead Temperature Range

(10 Seconds)

Power Dissipation

Junction Temperature

Thermal Resistance

(Switches)

Rev. E 12/04

2

1

1