SMB113A/B/SMB117/A

Preliminary Information

Summit Microelectronics, Inc

2111 2.4 6/24/2008

12

AC OPERATING CHARACTERISTICS

(Over recommended operating conditions, unless otherwise noted. All voltages are relative to GND.) Note 4

Symbol

Description

Conditions

Min

Typ

Max

Unit

1.5

12.5

25

Programmable power-On

sequence timeout period.

Programmable

power-on

sequence

position to sequence position delay.

50

ms

1.5

12.5

25

Programmable power-off

sequence timeout period.

Programmable power-off sequence

position to sequence position delay.

50

ms

OFF

50

100

Programmable sequence

termination period

Time between active enable in which

corresponding outputs must exceed there

programmed under voltage threshold. If

exceeded, a force shutdown will be

initiated.

200

ms

0

Programmable glitch filter

Period for which fault must persist before

fault triggered actions are taken.

8

µs

25

50

100

Reset timeout period

Applicable when HEALTHY pin is used as

an nRESET output pin. Programmable

time following assertion of last supply

before nRESET pin is released high.

200

ms

400

200

100

67

50

33

25

Programmable slew rate

reference

Adjustable slew rate factor proportional to

output slew rate.

20

V/s

Channels 0 to 3

LS Driver output rise time

4.2

ns

LS Driver output fall time

4.2

ns

HS Driver output rise time

2.9

ns

HS Driver output fall time

2.9

ns

High to low transition on HSDRV

30

Driver non-overlap delay

Low to high transition on buck HSDRV

60

ns

Note 4: Timing specifications are 20% shorter for the SMB113B device and 60% longer for SMB117A.