SMB110 datasheet(14/34 Pages) SUMMIT

14 / 34 page

SMB110

Preliminary Information

Summit Microelectronics, Inc

2099 2.3 3/1/2005

AC OPERATING CHARACTERISTICS

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

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

1.3

1.5

1.7

10.6

12.5

14.4

21.3

28.8

tPPTO

Programmable power-On

sequence timeout period.

Programmable

power-On

sequence

position to sequence position delay.

42.5

57.5

1.3

1.5

1.7

10.6

12.5

14.4

21.3

28.8

tDPOFF

Programmable power-off

sequence timeout period.

Programmable power-off sequence

position to sequence position delay.

42.5

57.5

21.3

28.8

42.5

57.5

100

115

tPRTO

Programmable reset

time-out delay

Programmable time following assertion of

last supply before nRESET pin is released

high.

170

200

230

OFF

42.5

57.5

100

115

tPST

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.

170

200

230

tPGF

Programmable glitch filter

Period for which fault must persist before

fault triggered actions are taken. Present

on all buck, boost, and inverting supplies.

6.8

9.2

µs

340

400

460

170

200

230

100

115

56.7

66.7

76.7

42.5

57.5

28.3

33.3

38.3

21.3

28.8

SRREF

Programmable slew rate

reference

Adjustable slew rate factor proportional to

output slew rate.

17.0

V/s

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