Product Summary

The DS1227S Kickstarter is a unique CMOS circuit which combines power conversion and microenergy management functions for battery operated systems. Using its integral DC-DC converter, the DS1227S supplies +5V on demand from either a 3 or 6 volt battery input. The primary +5V output, typically tied to the microcontroller VCC pin, is kickstarted on in response to any one of several possible momentary, external signal transitions. Two auxiliary +5V power supply outputs of the DS1227S can then be independently enabled or disabled under software control.

Parametrics

DS1227S absolute maximum ratings: (1)Input Voltage on any Pin Relative to Ground: -0.3 to 7.0V; (2)VDCI Peak Input Current: 450 mA; (3)Power Dissipation Plastic DIP (derate 7.41 mW/℃ above +50℃): - 555 mW; (4)Small Outline (derate 12.5 mW/℃ above +50℃): - 937 mW; (5)Operating Temperature: –40℃ to +85℃; (6)Storage Temperature: -55℃ to +125℃; (7)Lead Soldering Temperature: 260℃ for 10 seconds.

Features

DS1227S features: (1)Shuts down microcontroller power under software control when operation complete; (2)Provides 3 auxiliary power outputs for independent powering of system functions; (3)Allows design of power on demandsystems; (4)Insures maximum life of main power source; (5)Ideally suited for DS5000-based systems; (6)Available in 20-pin DIP or SOIC packages; (7)Operating temperature range of -40℃ to +85℃.

Diagrams

DS1227S boost mode configuration

DS1200
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