公开(公告)号：EP1873787B1

公开(公告)日：2010-02-17

申请号：EP06425452.7

申请日：2006-06-30

Applicant: STMicroelectronics S.r.l.

Inventor： Mondello, Antonino ,  Pisasale, Michelangelo

IPC: G11C29/12

CPC classification number: G11C29/02 ,  G11C16/04 ,  G11C29/021 ,  G11C29/028

公开(公告)号：EP1653315A1

公开(公告)日：2006-05-03

申请号：EP04105351.3

申请日：2004-10-28

Applicant: STMicroelectronics S.r.l.

Inventor： Pisasale, Michelangelo ,  Gaibotti, Maurizio ,  La Placa, Michele

IPC: G05F1/46 ,  G11C5/14 ,  G05F3/26

CPC classification number: G05F3/262 ,  G11C5/147

Abstract: A voltage down converter (200) includes voltage regulator means (205) receiving a first voltage (Vdd) and having a regulation node for providing a regulated second voltage (Vr) lower than the first voltage, and having a control node for providing a control voltage (Vg) corresponding to the second voltage; and a voltage driver circuit branch (220) receiving the first voltage and including a variable-conductivity element (Tsb) having a control terminal coupled to the control node for controlling a current sunk by the variable-conductivity element from the first voltage; The voltage driver circuit branch has a voltage supply node (Vo), for supplying a down-converted voltage (Vo) corresponding to the second voltage, which is decoupled from the regulation node. At least one additional voltage driver circuit branch (225-1 - 225-N) is provided, receiving the first voltage and coupled to the voltage supply node, and including: a further variable-conductivity element (T-1 - T-N) having a control terminal coupled to the control node for controlling a current sunk by the further variable-conductivity element from the first voltage; and switching means (SW-1 - SW-N) for selectively enabling the further variable-conductivity element so as to keep the down-converted voltage at a prescribed value depending on the regulated second voltage.

Abstract translation: 降压转换器（200）包括接收第一电压（Vdd）并具有用于提供低于第一电压的调节的第二电压（Vr）的调节节点的电压调节器装置（205），并具有用于提供控制的控制节点 对应于第二电压的电压（Vg）; 以及电压驱动电路分支（220），其接收所述第一电压并且包括具有耦合到所述控制节点的控制端的可变导电性元件（Tsb），用于控制由所述可变电导率元件从所述第一电压引起的电流下降; 电压驱动器电路分支具有电压供应节点（Vo），用于提供与调节节点分离的对应于第二电压的下变频电压（Vo）。 提供至少一个额外的电压驱动器电路分支（225-1-225-N），接收第一电压并耦合到电压供应节点，并且包括：另一可变导电元件（T-1-TN），其具有 控制端子，其耦合到所述控制节点，用于通过所述另一可变电导率元件从所述第一电压控制当前的下沉; 以及切换装置（SW-1-SW-N），用于选择性地使能另外的可变导电性元件，以便根据调节的第二电压将下变频电压保持在规定值。