MIC2185

Micrel, Inc.

MIC2185

4

October 2005

Parameter

Condition

Min

Typ

Max

Unit

Soft Start

Soft Start Current

5

µA

Current Limit

Current Limit Threshold Voltage

Voltage on CSH to trip current limit

100

mV

Error Amplifier

Error Amplifier Gain

20

V/V

Current Amplifier

Current Amplifier Gain

3.7

V/V

SKIP Input

SKIP Threshold

0.6

1.4

2.2

V

SKIP Input Current

0.1

5

µA

Oscillator Section

360

400

440

kHz

Maximum Duty Cycle

85

%

Minimum On Time

180

ns

170

200

230

Frequency Foldback Threshold

Measured at FB pin

0.3

V

Frequency Foldback Frequency

90

kHz

SYNC Threshold Level

0.6

1.4

2.2

V

SYNC Input Current

0.1

5

µA

SYNC Minimum Pulse Width

200

ns

SYNC Capture Range

Note 4

600

kHz

Gate Drivers (OUTN and OUTP)

Rise/Fall Time

50

ns

Driver Non-overlap Time

70

ns

90

ns

Output Driver Impedance

4

8

Ω

3

7

Ω

5

11

Ω

5

11

Ω

Note 1. Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when

operating the device outside of its operating ratings. The maximum allowable power dissipation is a function of the maximum junction tempera-

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

Note 3. Devices are ESD sensitive. Handling precautions recommended.

Note 4. See application information for limitations on maximum operating frequency.