MIC2593
Micrel
Electrical Characteristics (continued)
(8)
Symbol
I
AUX(THRESH)
I
SC(TRAN)
I
LIM(AUX)
R
DIS(12V)
R
DIS(12MV)
R
DIS(3V)
R
DIS(5V)
R
DIS(VAUX)
t
OFF(3V)
t
OFF(5V)
t
SC(TRAN)
t
OFF(12V)
t
OFF(12MV)
t
PROP(3VFAULT)
Parameter
Condition
Min
Typ
0.84
I
MAX
= V
STBY
/ R
DS(AUX)
0.375
0.7
1600
600
150
150
430
1
1.35
Max
Units
A
A
A
Ω
Ω
Ω
Ω
Ω
µs
Auxiliary Output Current Limit Threshold Current which must be drawn from V
AUX
Figure 4
to register as a fault
Maximum Transient Short Circuit Current
Regulated Current after Transient
Output Discharge Resistance
12VOUT[A/B]
12MVOUT[A/B]
3VOUT[A/B]
5VOUT[A/B]
VAUX[A/B]
Current Limit Response Time
for 3.3V and 5V Outputs,
Figure 2
V
AUX
Enabled, then Grounded
From end of I
SC(TRAN)
to C
FILTER
Time Out
12V
OUT[A/B]
= 6.0V
12MV
OUT[A/B]
= –6.0V
3V
OUT[A/B]
= 1.65V
5V
OUT[A/B]
= 2.5V
V
AUX[A/B]
= 1.65V
MIC2593-2
C
GATE
= 10nF,
V
IN
– V
SENSE
= 200mV
V
AUX
Current Limiter Response Time, V
AUX[A/B]
= 0V
(9)
Figure 5
12V Current Limit Response,
Figure 3
–12V Current Limit Response,
Figure 3
12V
OUT[A/B]
= 0V
(9)
12MV
OUT[A/B]
= 0V
(9)
33
1
1
1
µs
µs
µs
µs
Delay from 3V[A/B] Overcurrent Limit MIC2593-2
to FAULT Output
V
SENSE
– V
THLIMIT
= 200mV
C
FILTER
= 0
Delay from 5V[A/B] Overcurrent Limit MIC2593-2
to FAULT Output
V
SENSE
– V
THLIMIT
= 200mV
C
FILTER
= 0
ON[A/B], AUXEN[A/B] Pulse Width
MIC2593 Power-On Reset Time
after V
STBY
becomes valid
SCL (Clock) Period
Data In Set-Up Time to SCL HIGH
Data Out Stable After SCL LOW
Data LOW Set-Up Time to
SCL LOW
Data HIGH Hold Time After
SCL HIGH
Note 9
Note 9
t
PROP(5VFAULT)
1
µs
t
W
t
POR
100
500
ns
µs
SMBus Timing
(9)
t
1
t
2
t
3
t
4
t
5
Notes:
8.
9.
Specification for packaged product only.
Parameters guaranteed by design. Not 100% production tested.
Figure 1
Figure 1
Figure 1
Start Condition,
Figure 1
Stop Condition,
Figure 1
2.5
100
300
100
100
µs
ns
ns
ns
ns
April 2004
9
M9999-042204
STMICROELECTRONICS [ STMICROELECTRONICS ]
