Provided is a voltage regulator supplying a first voltage on a first output node and comprising a first input transistor of a non-inverting stage and a second biasing transistor of the non-inverting stage. The first and second transistors are coupled in series, in this order, between the first node and a second node of application of a second reference voltage. The second transistor is being configured to be controlled by a third voltage depending on the first voltage.

Provided is a voltage regulator supplying a first voltage on a first output node and comprising a first input transistor of a non-inverting stage and a second biasing transistor of the non-inverting stage. The first and second transistors are coupled in series, in this order, between the first node and a second node of application of a second reference voltage. The second transistor is being configured to be controlled by a third voltage depending on the first voltage.

Certain aspects of the present disclosure provide a power supply system. The power supply system generally includes a first voltage regulator and a second voltage regulator, outputs of the first voltage regulator and the second voltage regulator being coupled to an output of the power supply system. The power supply system may also include a current balancer circuit configured to adjust an output current of the first voltage regulator based on determined headrooms of the first voltage regulator and the second voltage regulator.

Certain aspects of the present disclosure provide a power supply system. The power supply system generally includes a first voltage regulator and a second voltage regulator, outputs of the first voltage regulator and the second voltage regulator being coupled to an output of the power supply system. The power supply system may also include a current balancer circuit configured to adjust an output current of the first voltage regulator based on determined headrooms of the first voltage regulator and the second voltage regulator.

Systems, methods, circuits and computer-readable mediums for regulators, e.g., low-dropout (LDO) regulators, with load-insensitive compensations are provided. An example regulator includes an amplifier operable to receive an input voltage and a feedback voltage, a follower responsive to an output voltage of the amplifier and operable to supply a regulated voltage to a load coupled to the follower, and a feedback circuit coupled to the load and the amplifier and operable to provide the feedback voltage. The amplifier is operable to have a substantially unity gain beyond a resonant frequency of the amplifier.

An apparatus, system, and method for digital-to-analog (converter) control are provided. A DAC includes a first resistor ladder including a plurality of first electrical taps into different portions of the first resistor ladder, first and second pass gate trees coupled to receive outputs from the first electrical taps, first and second buffers coupled to receive outputs from the first and second pass gate trees, respectively, a second resistor ladder coupled to receive and be biased by outputs of the first and second buffers, the second resistor ladder including a plurality of second electrical taps into different portions of the second resistor ladder, and third, fourth, and fifth pass gate trees coupled to receive outputs from the second electrical taps.

It is described a voltage regulator device (100), comprising: i) a power device (150), configured to receive an input signal (151) and to produce a corresponding output signal (152); ii) a comparator device (110), coupled via a feedback path (140) to the power device (150), and configured to receive the output signal (152) as a feedback signal (141), and to produce a compared feedback signal (112); and iii) a digital modulation device (120), arranged between the comparator device (110) and the power device (150), and configured to digitally modulate the compared feedback signal (112), and to provide the digitally modulated signal (121) to the power device (150), wherein the digital modulation device (120) comprises: iiia) a delta-sigma (122), iiib) a quantizer (124), and iiic) a feedforward path (128), configured to feedforward the compared feedback signal (112) beyond the delta-sigma (122).

A voltage regulator for digital loads combines a closed loop regulation circuit with an open loop topology. A transistor and a bank of transistors share the same voltage source VDD and gate control current. Each of the bank of transistors is sized to match different current load requirements and one or more may be switched in or out as appropriate when the digital load transitions from one operating mode to another. The regulator has good DC load regulation and unconditional stability regardless of output capacitance.

A linear power supply (1) includes a P-channel (or PNP) first output transistor (10) connected between an input terminal of an input voltage (Vin) and an output terminal of an output voltage (Vout), an N-channel (or NPN) second output transistor (20) connected in parallel to the first output transistor (10), and a control circuit (30) that switches between a first mode and a second mode according to the input voltage (Vin), in which the first mode uses the first output transistor (10) while the second mode uses the second output transistor (20) as an output transistor that generates the output voltage (Vout) from the input voltage (Vin).

A linear power supply (1) includes a P-channel (or PNP) first output transistor (10) connected between an input terminal of an input voltage (Vin) and an output terminal of an output voltage (Vout), an N-channel (or NPN) second output transistor (20) connected in parallel to the first output transistor (10), and a control circuit (30) that switches between a first mode and a second mode according to the input voltage (Vin), in which the first mode uses the first output transistor (10) while the second mode uses the second output transistor (20) as an output transistor that generates the output voltage (Vout) from the input voltage (Vin).