MIC3832/3833

Micrel

4-138

April 1998

Parameter

Conditions

Min

Typical

Max

Units

Current Limit/Shutdown Section

Bias Current

–0.02

µA

Current Limit Threshold

0.9

1.0

1.1

V

Shutdown Threshold

1.125

1.25

1.375

V

Delay to Output

400

600

ns

Front Edge Blanking Time

140

ns

PWM Comparator Section

Bias Current

measured at CMR (pin 12)

–2

–0.05

2

µA

Duty Cycle Range

C = 2.2nF

0

85

%

Delay to Output

300

500

ns

Output Sections

Output Low Level

I

0.1

0.4

V

I

1.5

2.5

V

Output High Level

I

12.5

V

I

12

13.1

V

Rise Time

C

50

150

ns

Fall Time

C

50

150

ns

UVLO Saturation

I

0.7

1.1

V

Q to Q Overlap

Q rising, Q falling, 50%

50

ns

Q to Q Overlap

Q rising, Q falling, 50%

50

ns

Undervoltage Lockout Section

Upper Threshold—Startup

MIC3832

15.9

V

MIC3833

8.3

V

Lower Threshold—Operating

MIC3832

9.8

V

(Shutdown)

MIC3833

7.8

V

Total Standby Current

Startup Current

0.04

0.2

mA

Operating Supply

17

mA

V

I

22

V

Note 1

Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when

operating the device beyond its specified Operating Ratings.

Note 2

Minimum and maximum Electrical Characteristics are 100% tested at T

Typicals are characterized at 25

°C and represent the most likely parametric norm.

Note 3

All pins ESD protected to 2kV. Test conditions: Supply pin grounded; all other pins floating.