Power-on management for voltage down-converter

Details Power-on management for voltage down-converter Power-on management for voltage down-converter

H - Electricity

02

M

H02M 7/517 (2006.01) G05F 1/46 (2006.01)

Patent

CA 2497559

A power-on management system (80) for an on-chip voltage down-converter (79), monitoring both external (Vcc_EXT) and internal (Vcc_INT) voltage supplies to independently determine (81, 82) when both supplies have reached minimum levels for proper operation of on-chip circuitry. The power-on management system (80) supplies output signals that: control the discharge (DISCH_Vcc) of the internal supply nodes at the initiation of power-on; force the active mode (POW_ON = high) of the voltage down-converter; and deactivate a fast local voltage reference on completion of power-on (POW_ON = low).

Cette invention concerne un système de gestion en marche (80) pour dévolteur sur puce (79), surveillant à la fois les tensions externes (Vcc_EXT) et internes (Vcc_INT) de manière à déterminer indépendamment (81, 82) le moment où les deux tensions d'alimentation ont atteint des niveaux minimum pour un fonctionnement approprié des circuits sur puce. Le système de gestion en marche (80) fournit des signaux de sortie qui: limitent la décharge (DISCH_Vcc) des noeuds d'alimentation interne au moment de la mise sous tension; force le mode actif (POW_ON = high) du dévolteur; et désactive une tension de référence locale rapide à la fin de la mise sous tension (POW_ON = low).

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