MIC2591B
Micrel
Parameter
C
FILTER
Overcurrent Delay
Scaling Factor
Delay(ms) = C
FILTER
(µF)
×
R
FILTER
(kΩ)
×
SF
Condition
V
12VIN
– V
12VSENSE
> V
THILIMIT
and/or
V
3VIN
–V
3VSENSE
> V
THILIMIT
V
12VIN
– V
12VSENSE
V
12VIN
– V
12VSENSE
V
3VIN
– V
3VSENSE
V
3VIN
– V
3VSENSE
MIC2591B-2BTQ
MIC2591B-3BTQ
MIC2591B-5BTQ
Min
Typ
Max
Units
Electrical Characteristics (continued)
(5)
Symbol
SF
C
FILTER
Overcurrent DelayTime, Pin 20 grounded through RFILTER[A&B] = 110 kΩ, 1%
4.4
5
5.6
V
THILIMIT
V
THFAST
I
12VSENSE[A/B]
I
3VSENSE[A/B]
V
IL
Current Limit Threshold Voltages
12V[A/B] supplies
3.3V[A/B] supplies
45
45
90
135
50
50
100
150
Disabled
0.35
0.35
55
55
110
165
mV
mV
mV
mV
µA
µA
12VOUT[A/B] and 3VOUT[A/B]
Fast-Trip Threshold Voltages
12VSENSE[A/B] Input current
3VSENSE[A/B] Input current
LOW-Level Input Voltage
ON[A/B], AUXEN[A/B], GPI_[A0/B0],
/FORCE_ON[A/B]
Output LOW Voltage
/FAULT[A/B], /PWRGD[A/B],
/INT, SDA
HIGH-Level Input Voltage
ON[A/B], AUXEN[A/B], GPI_[A0/B0],
/FORCE_ON[A/B], A[0-2], SCL, SDA
–0.5
0.8
V
V
OL
V
IH
I
OL
= 3mA
2.1
0.4
V
3.6
V
R
PULLUP(A0 - A2)
Internal Pull-ups from A[0-2]
to V
STBY[A/B]
I
LKG,OFF(12VIN[A/B])
12VIN[A/B] Input leakage current
LKG,OFF(12VIN[A/B])
12VIN[A/B] = OFF; 3VIN[A/B] = OFF
I
LKG,OFF(3VIN[A/B])
3VIN[A/B] Input leakage current
LKG,OFF(3VIN[A/B])
3VIN[A/B] = OFF; 12VIN[A/B] = OFF
I
IL
I
LKG(OFF)
T
OV
Input Leakage Current
SCL, ON[A/B], AUXEN[A/B],
/FORCE_ON[A/B]
Off-State Leakage Current
/FAULT[A/B], /PWRGD[A/B],
/INT, SDA, GPI_[A0/B0]
Overtemperature Shutdown and Reset
Thresholds, with overcurrent on slot
Overtemperature Shutdown and
Reset Thresholds, all other conditions
(all outputs will latch OFF)
R
DS(AUX)
V
OFF(VAUX)
Notes:
5.
6.
Specification for packaged product only.
Parameters guaranteed by design. Not 100% production tested.
40
V
STBY
= VSTBY[A/B] = +3.3V,
V
STBY
= VSTBY[A/B] = +3.3V,
1
1
±5
kΩ
µA
µA
µA
GPI_[A0/B0]: I
LKG
for these two pins
measured with V
AUX
OFF
T
J
increasing, each slot
(6)
T
J
decreasing, each slot
(6)
140
130
160
150
±5
µA
°C
°C
°C
°C
400
50
mΩ
mV
T
J
increasing, both slots
(6)
T
J
decreasing, both slots
(6)
I
DS
= 375mA, T
J
= 125°C
Output MOSFET Resistance
VAUX[A/B] MOSFET
Off-State Output Offset Voltage
V
AUX[A/B]
V
AUX[A/B]
= Off, T
J
= 125°C
March 2005
8
M9999-033105
MICREL [ MICREL SEMICONDUCTOR ]
