SMB113A/B/SMB117/A
Preliminary Information
AC OPERATING CHARACTERISTICS
(Over recommended operating conditions, unless otherwise noted. All voltages are relative to GND.) Note 4
Symbol
Description
Conditions
Min
Typ
1.5
Max
Unit
12.5
25
Programmable power-On Programmable
power-on
sequence
tPPTO
ms
sequence timeout period. position to sequence position delay.
50
1.5
12.5
25
Programmable power-off
Programmable power-off sequence
tDPOFF
ms
sequence timeout period. position to sequence position delay.
50
OFF
50
100
200
0
Time between active enable in which
corresponding outputs must exceed there
Programmable sequence
programmed under voltage threshold. If
termination period
tPST
ms
µs
exceeded, a force shutdown will be
initiated.
Period for which fault must persist before
Programmable glitch filter
tPGF
fault triggered actions are taken.
8
25
50
Applicable when HEALTHY pin is used as
an nRESET output pin. Programmable
Reset timeout period
tRESET
ms
time following assertion of last supply
100
200
400
200
100
67
before nRESET pin is released high.
Programmable slew rate
reference
Adjustable slew rate factor proportional to
output slew rate.
SRREF
V/s
50
33
25
20
Channels 0 to 3
tRL
tFL
tRL
tFL
LS Driver output rise time CG=100pF, VBATT=4.2V
4.2
4.2
2.9
2.9
30
ns
ns
ns
ns
LS Driver output fall time
CG=100pF, VBATT=4.2V
HS Driver output rise time CG=100pF, VBATT=4.2V
HS Driver output fall time
CG=100pF, VBATT=4.2V
High to low transition on HSDRV
Low to high transition on buck HSDRV
tDT
Driver non-overlap delay
ns
60
Note 4: Timing specifications are 20% shorter for the SMB113B device and 60% longer for SMB117A.
Summit Microelectronics, Inc
2111 2.4 6/24/2008
12
SUMMIT [ SUMMIT MICROELECTRONICS, INC. ]
