April 2004

9

M9999-042204

MIC2593

Micrel

Symbol

Parameter

Condition

Min

Typ

Max

Units

I

AUX(THRESH)

Auxiliary Output Current Limit Threshold Current which must be drawn from V

AUX

0.84

A

Figure 4

to register as a fault

I

SC(TRAN)

Maximum Transient Short Circuit Current

V

I

A

Regulated Current after Transient

0.375

0.7

1.35

A

Output Discharge Resistance

R

DIS(12V)

12VOUT[A/B]

12V

1600

Ω

R

DIS(12MV)

12MVOUT[A/B]

12MV

600

Ω

R

DIS(3V)

3VOUT[A/B]

3V

150

Ω

R

DIS(5V)

5VOUT[A/B]

5V

150

Ω

R

DIS(VAUX)

VAUX[A/B]

V

430

Ω

t

OFF(3V)

Current Limit Response Time

MIC2593-2

1

µs

for 3.3V and 5V Outputs, Figure 2

C

V

t

SC(TRAN)

V

V

(9)

33

µs

Figure 5

t

OFF(12V)

12V Current Limit Response,

12V

(9)

1

µs

Figure 3

t

OFF(12MV)

–12V Current Limit Response,

12MV

(9)

1

µs

Figure 3

t

PROP(3VFAULT)

Delay from 3V[A/B] Overcurrent Limit MIC2593-2

1

µs

to FAULT Output

V

C

t

PROP(5VFAULT)

Delay from 5V[A/B] Overcurrent Limit MIC2593-2

1

µs

to FAULT Output

V

C

t

W

ON[A/B], AUXEN[A/B] Pulse Width

Note 9

100

ns

t

POR

MIC2593 Power-On Reset Time

Note 9

500

µs

after V

t

1

SCL (Clock) Period

Figure 1

2.5

µs

t

2

Data In Set-Up Time to SCL HIGH

Figure 1

100

ns

t

3

Data Out Stable After SCL LOW

Figure 1

300

ns

t

4

Data LOW Set-Up Time to

Start Condition, Figure 1

100

ns

SCL LOW

t

5

Data HIGH Hold Time After

Stop Condition, Figure 1

100

ns

SCL HIGH

Notes:

8.

Specification for packaged product only.

9.

Parameters guaranteed by design. Not 100% production tested.