MIC2582/MIC2583
Symbol
V
FB
V
FBHYS
V
OL
Parameter
Power-Good Threshold Voltage
Condition
FB rising
FB falling
FB Hysteresis
/POR, /FAULT, PWRGD
Output Voltage
(/FAULT, PWRGD MIC2583/83R only)
Output Discharge Resistance
(MIC2583/83R only)
I
OUT
= 1mA
Min
1.19
1.15
Typ
1.24
1.20
40
0.4
Max
1.29
1.25
Micrel
Unit
V
V
mV
V
R
DIS
500
1000
Ω
µs
AC Parameters (Note 4)
t
OCFAST
Fast Overcurrent SENSE to GATE
Low Trip Time
V
CC
= 5V
V
CC
– V
SENSE
= 100mV
C
GATE
= 10nF
Figure 2
V
CC
= 5V, V
CC
– V
SENSE
= 50mV
C
FILTER
= 0
Figure 2
1
t
OCSLOW
Slow Overcurrent SENSE to GATE
Low Trip Time
ON Delay Filter
FB Delay Filter
5
µs
t
ONDLY
t
FBDLY
Note 1.
Note 2.
Note 3.
Note 4.
20
20
µs
µs
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Specification for packaged product only.
Not a tested parameter, guaranteed by design.
Timing Diagrams
V
TRIPFAST
50mV
(V
CC
– V
SENSE
)
t
OCSLOW
GATE
1V
1V
t
OCFAST
Figure 2. Current Limit Response
1.2V
FB
t
POR
1.5V
/POR
1.5V
/PWRGD
Figure 3. Power-On Reset Response
V
UVLO
V
CC
t
START
1V
V
GATE
Figure 4. Power-On Start-Up Delay Timing
MIC2582/MIC2583
6
April 2003
MICREL [ MICREL SEMICONDUCTOR ]
