Micrel, Inc.

MIC4685

January 2010

4

M9999-012610

Absolute Maximum Ratings

(1)

EDS Rating

Operating Ratings

(2)

Package Thermal Resistance

SPAK-7 (

SPAK-7 (

Electrical Characteristics

Parameter

Condition

Min

Typ

Max

Units

MIC4685 [Adjustable]

(±2%)

(±3%)

1.210

1.198

1.235

1.260

1.272

V

V

Feedback Voltage

1.186

1.173

1.235

1.284

1.297

V

V

Feedback Bias Current

50

nA

Maximum Duty Cycle

94

%

5

500

µA

Output Leakage Current

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

70

120

kHz

Oscillator Frequency

180

200

225

kHz

Saturation Voltage

0.59

V

Short Circuit Current Limit

3.5

6

A

Shutdown Current

150

200

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

Notes:

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

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

3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.

circuit on page 1.