April 2005

5

M9999-042205

MIC2172/3172

Micrel, Inc.

Parameter

Conditions

Min

Typ

Max

Units

Error Amplifier Section

3.0

3.9

6.0

µA/mV

2.4

7.0

µA/mV

500

800

2000

V/V

Output Current

V

125

175

350

µA

100

400

µA

Output Swing

High Clamp, V

1.8

2.1

2.3

V

Low Clamp, V

0.25

0.35

0.52

V

Compensation Pin

Duty Cycle = 0

0.8

0.9

1.08

V

Threshold

0.6

1.25

V

Output Switch Section

ON Resistance

I

0.76

1

Ω

1.1

Ω

Current Limit

Duty Cycle = 50%, T

1.25

3

A

Duty Cycle = 50%, T

1.25

3.5

A

Duty Cycle = 80% Note 2

1

2.5

A

Breakdown Voltage (BV)

65

75

V

I

Oscillator Section

Frequency (f

88

100

112

kHz

85

115

kHz

Duty Cycle [δ(max)]

80

89

95

%

Input Supply Voltage Section and Enable Section

Minimum Operating Voltage

2.7

3.0

V

Quiescent Current (I

7

9

mA

Shutdown, V

0.1

5

µA

9

20

mA

Enable Input Threshold

0.4

1.2

2.4

V

Enable Input Current

V

–1

0

1

µA

V

2

10

µA

Bold type denotes specifications applicable to the full operating temperature range.

Note 1

Devices are ESD sensitive. Handling precautions required.

Note 2

Note 3

Specification for packaged product only.