MIC2186

Micrel

MIC2186

4

July 2002

Parameter

Condition

Min

Typ

Max

Units

Enable/UVLO

Enable Input Threshold

0.6

0.9

1.2

V

UVLO Threshold

1.4

1.5

1.6

V

UVLO Hysteresis

140

mV

Enable Input Current

V

0.2

5

µA

Soft Start

Soft Start Current

5

µA

Current Limit

Current Limit Threshold Voltage

(Voltage on CSH to trip current limit)

80

100

120

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

V

0.1

5

µA

HIDC Input

HIDC Threshold

0.6

1.4

2.2

V

Oscillator Section

Oscillator Frequency (f

360

400

440

kHz

Maximum Duty Cycle

V

85

%

V

50

Minimum On Time

V

180

ns

FREQ/2 Frequency (f

170

200

230

kHz

Frequency Foldback Threshold

Measured on FB

0.3

V

Frequency Foldback Frequency

V

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

f

600

kHz

Gate Drivers

Rise/Fall Time

C

50

ns

Output Driver Impedance

source; V

1.8

4

Ω

sink; V

1.6

3.5

Ω

source; V

2.6

Ω

sink; V

2.4

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

temperature, T

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.