Micrel, Inc.

MIC4680

March 2008

4

M9999-032808

Parameter

Condition

Min

Typ

Max

Units

regulator off

2

1.6

V

Shutdown Input Logic

Level

regulator on

1.0

0.8

V

–10

–0.5

10

µA

Shutdown Input Current

–10

–1.5

10

µA

Thermal Shutdown

160

°C

Notes:

1. Exceeding the absolute maximum rating may damage the device.

2. The device is not guaranteed to function outside its operating rating.

3. Absolute maximum rating is intended for voltage transients only, prolonged dc operation is not recommended.

5. Devices are ESD sensitive. Handling precautions recommended.

6. Measured on 1" square of 1 oz. copper FR4 printed circuit board connected to the device ground leads.

Test Circuit

SW

68µH

IN

FB

GND

SHDN

Device Under Test

+12V

SHUTDOWN

ENABLE

SOIC-8

5–8

4

3

2

1

I

Current Limit Test Circuit

Shutdown Input Behavior

OFF

ON

0.8V

1V

0V

1.6V

2V

Shutdown Hysteresis