Micrel, Inc.
MIC2590B
Symbol
I
LIM(AUX)
R
DISCH
R
(12V)
R
(12MV)
R
(3V)
R
(5V)
R
(3VAUX)
t
OFF(3)
t
OFF(5)
T
SC(TRAN)
t
OFF(12)
t
OFF(12M)
T
PROP(3VFAULT)
T
PROP(5VFAULT)
t
W
t
POR
Parameter
Regulated Current after Transient
Output Discharge Resistance
12V
OUT
[A/B]
12MV
OUT
[A/B]
3V
OUT
[A/B]
5V
OUT
[A/B]
3V
AUX
[A/B]
Current Limit Response Time for 3.3V
and 5V Outputs,
Figure 2
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
Delay from 5V[A/B] overcurrent-limit to
FAULT Output
ON[A/B], AUXEN[A/B] Pulse Width
MIC2590B Power-On Reset Time after
VSTBY becomes valid
Total Unadjusted Error Voltage,
All Outputs
Current, 3V
OUT
[A/B]/5V
OUT
[A/B]
Current, V
AUX
[A/B], 12V
OUT
[A/B],
12MV
OUT
[A/B]
Condition
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
5MV
OUT
[A/B] = 2.5V
5V
OUT
[A/B] = 1.65V
MIC2590B-2 with C
GATE
= 10nF,
V
IN
– V
SENSE
= 200mV
V
AUX
[A/B] = 0V,
Note 5
12V
OUT
[A/B] = 0V,
Note 5
12MV
OUT
[A/B] = 0V,
Note 5
MIC2590B-2, V
SENSE
– V
THLIMIT
=
200mV, C
FILTER
= open
MIC2590B-2, V
SENSE
– V
THLIMIT
=
200mV, C
FILTER
= open
Note 5
Note 5
Min
0.375
Typ
0.7
Max
1.35
Units
A
1600
600
150
150
430
1
33
1
1
1
1
100
500
Ω
Ω
Ω
Ω
Ω
µs
µs
µs
µs
µs
µs
ns
µs
8-Bit Analog to Digital Converter
–3
Measured as voltage across
corresponding external R
SENSE
–3
±3
60
3.85
15.1
375
1.47
3.85
15.1
External R
SENSE
= 6.00mΩ
11.6
45.5
5.89
23.1
External R
SENSE
= 6.00mΩ
6.96
27.3
100
+3
+3
%
%
%
ms
V
mV
mA
mA
V
mV
A
mA
V
mV
A
mA
t
CONV
V
AUXA
V
AUXB
Conversion Time
Resolution Specifications:
Full Scale Voltage
LSB of Voltage
Full Scale Current
LSB of Current
3V
OUTA
3V
OUTB
Full Scale Voltage
LSB of Voltage
Full Scale Current
LSB of Current
5V
OUTA
5V
OUTB
Full Scale Voltage
LSB of Voltage
Full Scale Current
LSB of Current
September 2008
8
M9999-091808
MICREL [ MICREL SEMICONDUCTOR ]
