Provide an overview of the LTC295x Push Button Controller family

1. LTC295x: Pushbutton On/Off Controllers Source: LINEAR TECHNOLOGY

4. LTC295x Push Button Controller

6. Selection Table Part Number Supply Voltage (V) Supply Current ON Timer OFF Timer Kill Timer Comments Package LTC2950 2.7 to 26 6µA Adj Adj 1024ms Active high or low enable outputs TSOT-8 DFN-8 LTC2951 2.7 to 26 6µA 128ms Adj Adj Active high or low enable outputs TSOT-8 DFN-8 LTC2952 2.7 to 28 25µA Adj 26ms Adj Push button power path controller with system monitoring TSSOP-20 QFN-20 LTC2953 2.7 to 27 12µA 32ms 32ms Adj Push Button Controller with Supply Monitor, UVLO and Power Fail Comparators DFN-12 LTC2954 2.7 to 26 6µA Adj 32ms Adj Interrupt logic for menu driven applications. Active high enable output (LTC2954-1), active low enable output (LTC2954-2) TSOT-8 DFN-8

11. Turn-On Timing Comparison Table Turn On De-Bounce Time System OK Response Time LTC2950 32ms + Adjustable 512ms LTC2951 128ms 512ms LTC2952 26ms + Adjustable 400ms LTC2953 32ms 512ms LTC2954 32ms + Adjustable 512ms

12. Turn Off Timing Comparison Table Interrupt De-Bounce Time (Short PB Pulse) Turn Off De-Bounce Time (Long PB Pulse) Automatic Shut Down After Interrupt (KILL Timer) LTC2950 32ms + Adjustable 1024ms LTC2951 32ms + Adjustable 128ms + Adjustable LTC2952 26ms 26ms + Adjustable LTC2953 32ms 64ms + Adjustable LTC2954 32ms 64ms + Adjustable

13. What if the DC/DC Converter is Faulty at Power Up?