Micrel, Inc.
Symbol
V
OFF(+12V)
V
OFF(12MV)
V
OFF(AUX)
I
LIM(12V)
I
LIM(12MV)
I
FASTLIM(12V)
I
FASTLIM(12MV)
I
AUX(THRESH)
I
SC(TRAN)
I
LIM(AUX)
R
DISCH
R
DISCH(12V)
R
DISCH(12MV)
R
DISCH(3V)
R
DISCH(5V)
R
DISCH(VAUX)
t
OFF(3V)
t
OFF(5V)
T
SC(TRAN)
t
OFF(12V)
t
OFF(12MV)
t
PROP(3VFAULT)
Parameter
Off-State Output Offset Voltage
12V
OUT
[A/B]
12MV
OUT
[A/B]
V
AUX
[A/B]
Current Limit Slow-Trip Threshold
+12V MOSFET
–12V MOSFET
Current Limit Fast-Trip Thresholds
+12V MOSFET
–12V MOSFET
Auxiliary Output Current Limit Threshold
Figure 4
Maximum Transient Short Circuit
Current
Regulated Current after Transient
Output Discharge Resistance
12V
OUT
[A/B]
12MV
OUT
[A/B]
3V
OUT
[A/B]
5V
OUT
[A/B]
V
AUX
[A/B]
Current Limit Response Time for 3.3V
and 5V Outputs,
Figure 2
12V
OUT
[A/B] = 6.0V
12MV
OUT
[A/B] = –6.0V
3V
OUT
[A/B] = 1.65V
5MV
OUT
[A/B] = 2.5V
5V
OUT
[A/B] = 1.65V
MIC2593-2
C
GATE
= 10nF
V
IN
– V
SENSE
= 200mV
V
AUX
Current Limiter Response Time,
Figure 5
12V Current Limit Response Time,
Figure 3
–12V Current Limit Response Time,
Figure 3
Delay from 3V[A/B] overcurrent-limit to
FAULT Output
V
AUX
[A/B] = 0V
(6)
MIC2593
Condition
12V
OUT
[A/B] = Off, T
J
= 125°C
12MV
OUT
[A/B] = Off, T
J
= 125°C
V
AUX
[A/B] = Off, T
J
= 125°C
12V
OUT
[A/B] = 0V
12MV
OUT
[A/B] = 0V
MIC2593-2BTQ
12V
OUT
[A/B]
12MV
OUT
[A/B]
Current which must be drawn
from V
AUX
to register as a fault
V
AUX
Enabled, then Grounded
From end of I
SC(TRAN)
to C
FILTER
Time Out
0.84
I
MAX
= V
STBY
/ R
DS(AUX)
0.375
0.7
1.35
A
A
A
0.52
–0.11
1.0
–0.20
1.0
–0.2
2.15
–0.45
–50
50
1.5
–0.3
3.0
–0.6
Min
Typ
Max
50
Units
mV
mV
mV
A
A
A
A
1600
600
150
150
430
1
Ω
Ω
Ω
Ω
Ω
µs
33
1
1
1
µs
µs
µs
µs
12V
OUT
[A/B] = 0V
(6)
12MV
OUT
[A/B] = 0V
(6)
MIC2593-2
V
SENSE
– V
THLIMIT
= 200mV
C
FILTER
= open
MIC2593-2
V
SENSE
– V
THLIMIT
= 200mV
C
FILTER
= open
Note 5
Note 5
t
PROP(5VFAULT)
Delay from 5V[A/B] overcurrent-limit to
FAULT Output
1
µs
t
W
t
POR
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
100
500
ns
µs
SMBus Timing, Note 5
t
1
t
2
Figure 1
Figure 1
2.5
100
µs
ns
September 2008
8
M9999-092208
MICREL [ MICREL SEMICONDUCTOR ]
