SMB117 查看數據表（PDF） - Summit Microelectronics
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SMB117 Datasheet PDF : 32 Pages
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SMB113A/B/SMB117/A
Preliminary Information
AC OPERATING CHARACTERISTICS
(Over recommended operating conditions, unless otherwise noted. All voltages are relative to GND.) Note 5
Symbol Description
Conditions
Min Typ Max Unit
1.5
Programmable power-On Programmable power-on sequence
12.5
tPPTO
sequence timeout period. position to sequence position delay.
25
ms
50
1.5
tDPOFF
Programmable power-off Programmable power-off sequence
sequence timeout period. position to sequence position delay.
12.5
25
ms
50
Time between active enable in which
OFF
tPST
Programmable sequence
termination period
corresponding outputs must exceed there
programmed under voltage threshold. If
exceeded, a force shutdown will be
50
100
ms
initiated.
200
tPGF
Programmable glitch filter
Period for which fault must persist before
fault triggered actions are taken.
0
8
μs
Applicable when HEALTHY pin is used as
25
tRESET
Reset timeout period
an nRESET output pin. Programmable
time following assertion of last supply
50
100
ms
before nRESET pin is released high.
200
400
200
100
Programmable slew rate Adjustable slew rate factor proportional to
67
SRREF
reference
output slew rate.
50
V/s
33
25
20
Channels 0 to 3
tRL
LS Driver output rise time CG=100pF, VBATT=4.2V
4.2
ns
tFL
LS Driver output fall time CG=100pF, VBATT=4.2V
4.2
ns
tRL
HS Driver output rise time CG=100pF, VBATT=4.2V
2.9
ns
tFL
HS Driver output fall time CG=100pF, VBATT=4.2V
2.9
ns
High to low transition on HSDRV
tDT
Driver non-overlap delay
Low to high transition on buck HSDRV
30
ns
60
Note 5: Timing specifications are 20% shorter for the SMB113B device and 60% longer for SMB117A.
Summit Microelectronics, Inc
2111 2.6 9/16/2010
12
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