The present application provides a distributed LDO regulator structure without an external capacitor. The structure includes one CORE module; and one or more POWER modules driven by one of the CORE modules. The CORE module comprises a mirror source voltage generating circuit and a built-in LDO regulator circuit. An output end of an operational amplifier and a gate of the sixth PMOS together serve as a control voltage end of the POWER module. A negative input end of the operational amplifier is connected to a drain of the fifth PMOS and a source of the sixth PMOS by means of a first resistor, wherein a connection end serves as an output end of the built-in LDO regulator circuit. POWER modules having the same output voltage are connected to each other in parallel.

The present application provides a distributed LDO regulator structure without an external capacitor. The structure includes one CORE module; and one or more POWER modules driven by one of the CORE modules. The CORE module comprises a mirror source voltage generating circuit and a built-in LDO regulator circuit. An output end of an operational amplifier and a gate of the sixth PMOS together serve as a control voltage end of the POWER module. A negative input end of the operational amplifier is connected to a drain of the fifth PMOS and a source of the sixth PMOS by means of a first resistor, wherein a connection end serves as an output end of the built-in LDO regulator circuit. POWER modules having the same output voltage are connected to each other in parallel.

A voltage regulator includes an operational amplifier, a first transistor, a second transistor, a capacitor and a current sink circuit. The operational amplifier outputs a control voltage according to an amplified differential voltage between a first input terminal and a second input terminal of the operational amplifier. The first transistor includes a control terminal receiving the control voltage, a first terminal coupled to a supply terminal, a second terminal providing an output voltage, and a bulk terminal. The second transistor includes a second terminal coupled to the bulk terminal of the first transistor, and a bulk terminal coupled to the supply terminal. The capacitor includes a first terminal coupled to the bulk terminal of the first transistor, and a second terminal receiving the output voltage. The current sink circuit generates a feedback voltage according to the output voltage and output the feedback voltage to the operational amplifier.

A voltage regulator includes an operational amplifier, a first transistor, a second transistor, a capacitor and a current sink circuit. The operational amplifier outputs a control voltage according to an amplified differential voltage between a first input terminal and a second input terminal of the operational amplifier. The first transistor includes a control terminal receiving the control voltage, a first terminal coupled to a supply terminal, a second terminal providing an output voltage, and a bulk terminal. The second transistor includes a second terminal coupled to the bulk terminal of the first transistor, and a bulk terminal coupled to the supply terminal. The capacitor includes a first terminal coupled to the bulk terminal of the first transistor, and a second terminal receiving the output voltage. The current sink circuit generates a feedback voltage according to the output voltage and output the feedback voltage to the operational amplifier.

According to an aspect a low noise electronic voltage regulator comprises a regulating transistor operative to regulate an input DC voltage to provide a regulated DC output voltage, an error amplifier configured to generate an error signal based on a reference voltage and a feedback voltage, wherein the error amplifier receiving the feedback voltage through a feedback loop formed between the regulated DC output voltage and the feedback voltage, and a first amplifier in the feedback loop providing a gain of greater than unity from the regulated DC output voltage and the feedback voltage.

According to an aspect a low noise electronic voltage regulator comprises a regulating transistor operative to regulate an input DC voltage to provide a regulated DC output voltage, an error amplifier configured to generate an error signal based on a reference voltage and a feedback voltage, wherein the error amplifier receiving the feedback voltage through a feedback loop formed between the regulated DC output voltage and the feedback voltage, and a first amplifier in the feedback loop providing a gain of greater than unity from the regulated DC output voltage and the feedback voltage.

A voltage-to-current converter includes a first transistor having a drain coupled to a first node, a second transistor having a drain coupled to the first node, an operational amplifier having a first input terminal configured to receive a reference voltage and a second input terminal coupled to a source of the first transistor or a source of the second transistor, a control circuit having an input terminal coupled to an output terminal of the operational amplifier, a first output terminal coupled to a gate of the first transistor, and a second output terminal coupled to a gate of the second transistor, a first resistor coupled between the source of the first transistor and a ground, and a second resistor coupled between the source of the second transistor and the ground. An output current of the voltage-to-current converter is generated from the first node.

A voltage-to-current converter includes a first transistor having a drain coupled to a first node, a second transistor having a drain coupled to the first node, an operational amplifier having a first input terminal configured to receive a reference voltage and a second input terminal coupled to a source of the first transistor or a source of the second transistor, a control circuit having an input terminal coupled to an output terminal of the operational amplifier, a first output terminal coupled to a gate of the first transistor, and a second output terminal coupled to a gate of the second transistor, a first resistor coupled between the source of the first transistor and a ground, and a second resistor coupled between the source of the second transistor and the ground. An output current of the voltage-to-current converter is generated from the first node.

Some embodiments include apparatuses and methods of using such apparatuses. One of the apparatuses includes a control circuitry to generate error information based on a value of the feedback voltage generated from an output voltage, generate output information to control a power switching unit based on the error information provided to a forward path in the control circuitry, and adjust a gain of the forward path based on a gain factor computed based at least in part on a first value of the output information in order to cause the output information to have a second value. The control circuitry also computes a value of correction information when the output voltage is within a target value range, and adjusts the control information, based on the correction information, when the output voltage is outside the target value range.

A semiconductor device includes first to N-th voltage output circuits each outputting an output voltage and outputs a feedback voltage having a voltage value corresponding to the output voltage, and a differential circuit including first to N-th primary side transistors to which N feedback voltages are input and that individually flow first to N-th currents through a first node, a secondary side transistor that flows a reference current corresponding to a reference voltage through the first node, and a current mirror circuit as an active load. The current mirror circuit includes first to N-th primary side load transistors individually coupled in cascade to the first to N-th primary side transistors, a secondary side load transistor coupled in cascade to the secondary side transistor and generates a voltage at a connection point between the secondary side transistor and the secondary side load transistor as a control voltage.