LTC2954 Linear Technology, LTC2954 Datasheet - Page 10

• Manufacturer Part Number: LTC2954
• Description: Push Button On/Off Controller
• Manufacturer: Linear Technology

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LTC2954
APPLICATIO S I FOR ATIO
10
KILL
ONT
PDT
INT
PB
EN
Figure 1. Simplified Power On/Off Sequence for LTC2954-1. μP Asserts  K  I  L  L after an Interrupt
XXX DON'T CARE
U
t
1
t
DB, ON
U
Figure 2.  K  I  L  L Remaining Low Aborts Power On Sequence for LTC2954-1
t
ONT
POWER ON
W
t
2
TIMING
KILL
PB
EN
PB & KILL IGNORED
t
KILL, ON BLANK
t
3
U
t
DB, ON
+ t
t
4
ONT
µP FAILED TO SET
KILL HIGH
INTERNAL
512ms
TIMER
t
5
t
ABORT
t
DB, OFF
POWER
TURNED OFF
t
t < t
6
PB IGNORED
t
PD, MIN
PDT
2954 F02
t
µP DRIVES
7
KILL LOW
t
8
t
9
2954 F01
2954f