MIC2585 Micrel Semiconductor, MIC2585 Datasheet - Page 17

• Manufacturer Part Number: MIC2585
• Description: (MIC2584 / MIC2585) Dual-Channel Hot Swap Controller/Sequencer
• Manufacturer: Micrel Semiconductor

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The sequenced output feature is enabled for the MIC2585 by
placing a capacitor from CDLY to ground. The –1 option
allows for V
V
grams, Figure 5
determined using the following equation:
where V
I
C
provide a quick reference for several timer calculations using
select standard value capacitors.
Undervoltage Lockout
Internal circuitry keeps both GATE output charge pumps off
until VCC1 and VCC2 exceed 2.165V and 0.8V, respectively.
March 2005
MIC2584/2585
DELAY
OUT1
DLY
0.033 F
0.01 F
0.05 F
0.33 F
0.47 F
is the capacitor connected to CDLY. Tables 2, 3, and 4
t
0.1 F
C
, the CDLY pin charge current, is typically 6 A, and
DLY
1 F
to follow V
POR
DELAY
Table 2. Selected Power-On Reset and
OUT2
C
, the CDLY pin threshold, is typically 1.235V,
DLY
to follow V
"). The sequenced output delay time is
OUT2
V
I
Start-Up Delays
DELAY
DELAY
during start-up (See "
t
120ms
1.2ms
12ms
40ms
56ms
START
OUT1
4ms
6ms
0.2 C
and the –2 option allows for
DLY
( F)
16.5ms
165ms
235ms
500ms
25ms
50ms
t
5ms
Timing Dia-
POR
(9)
17
Table 4. Selected Sequenced Output Delays
Table 3. Selected Overcurrent Timer Delays
0.047 F
0.047 F
C
1000pF
3300pF
4700pF
0.01 F
0.33 F
0.01 F
0.33 F
0.82 F
220pF
680pF
0.1 F
0.1 F
2.2 F
C
FILTER
1 F
DLY
t
OCSLOW
23.5ms
165ms
165ms
200ms
440ms
110 s
340 s
500 s
1.6ms
950 s
9.5ms
50ms
20ms
66ms
t
5ms
2ms
DLY
MIC2584/2585
Micrel