Abstract:
A voltage regulator having an output terminal adapted to being connected to a load, including an operational amplifier having its non-inverting input connected to a first reference voltage, and its inverting input connected to the output terminal, an inverting stage having its input connected to the output of the operational amplifier, a power switch controlled by the output of the inverter stage, arranged between the output terminal and a supply voltage, and a charge capacitor arranged between the output terminal and a reference supply voltage, including a means for reducing the effective output impedance of the operational amplifier.
Abstract:
A voltage regulator having an output terminal adapted to being connected to a load, including a device for limiting the current flowing through the load to a first threshold current if the voltage of the output terminal is lower than a threshold voltage, and to a second current threshold higher than the first current threshold if the voltage of the output terminal is greater than the threshold voltage.
Abstract:
A low-dropout voltage regulator comprises an output terminal for providing an output voltage regulated as a function of a reference voltage, and for providing an output current, and additionally comprising an output current limiting unit. The current limiting unit comprises a replicator for replicating the output current to provide a mirror current of the output current, a comparator circuit for comparing the mirror current with a reference current, and a feedback circuit for supplying feedback to the regulator in order to limit the output current when the mirror current is greater than the reference current. The mirror current is injected into the output terminal.
Abstract:
A voltage regulator having an output terminal provided for being connected to a load, including an amplifier having its inverting input connected to a reference voltage, and its non-inverting input connected to the output terminal, a charge capacitor arranged between the output terminal and a first supply voltage, first and second voltage-controlled switches each arranged to connect a second supply voltage and the output terminal, and a control means adapted to providing a voltage depending on the output voltage of the amplifier, on the one hand, to the gate of the first switch and, on the other hand, when the current flowing through the first switch reaches a predetermined threshold, to the gate of the second switch.
Abstract:
The invention proposes a low-dropout voltage regulator comprising an output terminal for providing an output voltage (Vout) regulated as a function of a reference voltage, and for providing an output current (Iout), and additionally comprising an output current limiting unit (LIMIT3), with said unit comprising:—replication means for replicating the output current (T31) to provide a mirror current of the output current (Imirror),—comparison means (COMP31, COMP32) for comparing the mirror current with a reference current (Iref),—feedback means for supplying feedback (COMP31, COMP32, R35, REGUL3) to the regulator in order to limit the output current when the mirror current is greater than the reference current, and the mirror current is injected into the output terminal.
Abstract:
A voltage regulator having an output terminal adapted to being connected to a load, including an operational amplifier having its non-inverting input connected to a reference voltage, and its inverting input connected to the output terminal, an inverting amplifier having its input connected to the output of the operational amplifier, a capacitive impedance connected between the input and the output of the inverting amplifier, a power switch controlled by the output of the inverter amplifier, arranged to connect the output terminal to a first supply voltage, said capacitive impedance including a short-circuitable portion associated with active short-circuit means when the current flowing through the load is greater than a predetermined current.
Abstract:
A low dropout voltage (LDO) regulator comprises an output stage (EtS) of the amplifier (AMP), which has a main output and n auxiliary outputs which can respectively deliver a main control voltage (VGPRINC) and n auxiliary control voltages (VG1, . . . , VGn); and a power stage (EtP) which has a main power transistor (PmosPrinc), controlled at its gate by the main control voltage (VGPRINC), and p power modules (module 1, . . . , module n) of identical layout with p less than or equal to n, respectively having p auxiliary power transistors (PMos1, . . . , PMosn) each controlled at their gate by p auxiliary control voltages (VG1, . . . , VGn). The number p is selected as a function of an intended maximum output current.
Abstract translation:低压降电压(LDO)调节器包括放大器(AMP)的输出级(EtS),其具有主输出和n个辅助输出,其可以分别传递主控制电压(V SUB GPIN) 和N个辅助控制电压(V S1,...,V Gn N); 以及功率级(EtP),其具有主功率晶体管(PmosPrinc),其主栅极受到主控制电压(V SUB)和p功率模块(模块1,..., 分别具有p个小于或等于n的p个相同布局的模块n),分别具有p个辅助功率晶体管(PMOS 1,...,PMosn),每个辅助功率晶体管(PMos 1,...,PMosn)通过p个辅助控制电压(V SUB G1 >,...,V> Gn)。 数字p被选择为预期的最大输出电流的函数。
Abstract:
A linear regulator having an output stage including first and second P-channel MOS transistors series connected between a first D.C. supply terminal and an output terminal providing a regulated output voltage, and a circuit for controlling the first and second transistors capable of providing the first and second transistors with first and second control signals according to the output voltage and to the voltage at the midpoint of the series connection.
Abstract:
An active leakage consuming module (1001) is to be added to an LDO regulator without modification of the structure of this latter. The module provides a low-power operating mode with reduced current consumption, without impairing an operation of the LDO regulator for higher currents output by said LDO regulator. The module comprises a leakage current path (54) and control means (40, 50) for conducting consumed current below a threshold out of a pull-down path of the LDO regulator.
Abstract:
An active leakage consuming module (1001) is to be added to an LDO regulator without modification of the structure of this latter. The module provides a low-power operating mode with reduced current consumption, without impairing an operation of the LDO regulator for higher currents output by said LDO regulator. The module comprises a leakage current path (54) and control means (40, 50) for conducting consumed current below a threshold out of a pull-down path of the LDO regulator.