January 2010

3

M9999-012610

MIC4684

Micrel, Inc.

Electrical Characteristics

Parameter

Condition

Min

Typ

Max

Units

Feedback Voltage

(±2%)

1.210

1.235

1.260

V

(±3%)

1.198

1.272

V

1.186

1.235

1.284

V

1.173

1.297

V

Feedback Bias Current

50

nA

Maximum Duty Cycle

94

%

Output Leakage Current

5

500

µA

1.4

20

mA

Quiescent Current

6

12

mA

Bootstrap Drive Current

250

380

mA

Bootstrap Voltage

5.5

6.2

V

Frequency Fold Back

30

50

120

kHz

Oscillator Frequency

180

200

225

kHz

Saturation Voltage

0.59

V

Short Circuit Current Limit

2.2

A

Shutdown Current

150

µA

Enable Input Logic Level

regulator on

2

V

regulator off

0.8

V

Enable Pin Input Current

16

50

µA

–1

–0.83

mA

160

°C

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

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

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

to 3.3V circuit on page 1.

Note 5. Measured on 1” square of 1 oz. copper FR4 printed circuit board connected to the device ground leads.

ESD Rating...............................................................

Note 3

Package Thermal Resistance