Low drop-out regulator
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorSoo Woong LEE
Life of this patent
Estimating the term…
Abstract
There is provided a low drop-out regulator. The low drop-out regulator includes a reference voltage generating unit converting input power to generate a reference voltage; an amplifier comparing the reference voltage and a feedback voltage to output a gate signal; a pass transistor array unit including a first transistor and a second transistor respectively including a gate receiving the gate signal; a voltage detector detecting the feedback voltage and an output voltage by using a switching operation of the pass transistor array unit; and a controller shutting off the gate signal applied to either of the first transistor or the second transistor, according to the reference voltage and the input power.
Claims19
A low drop-out regulator, comprising:
- a reference voltage generating unit converting input power to generate a reference voltage;
- an amplifier comparing the reference voltage and a feedback voltage to output a gate signal;
- a pass transistor array unit including a first transistor and a second transistor respectively including a gate receiving the gate signal;
- a voltage detector detecting the feedback voltage and an output voltage by using a switching operation of the pass transistor array unit;
- and
- a controller shutting off the gate signal applied to either of the first transistor or the second transistor, according to the reference voltage and the input power.
A low drop-out regulator, comprising:
- a reference voltage generating unit converting input power to generate a reference voltage;
- an amplifier comparing the reference voltage and a feedback voltage to output a gate signal;
- a pass transistor array unit including a first switch having one end connected to an output terminal of the amplifier, a second switch having one end connected to the output terminal of the amplifier, a first transistor having a gate connected to the other end of the first switch, a second transistor having a gate connected to the other end of the second switch, a third switch connecting the first switch, a connecting node of the first transistor and an input terminal of the input power to one another, and a fourth switch connecting the second switch, a connecting node of the second transistor and the input terminal of the input power to one another;
- a voltage detector detecting the feedback voltage and an output voltage by using a switching operation of the pass transistor array unit;
- and
- a controller controlling switching operations of the first switch, the second switch, the third switch, and the fourth switch according to the reference voltage and the input power.
Dependencies are inferred from the claim text.