Low drop-out voltage regulator
First Claim
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1. A voltage regulator comprising:
- a regulation loop comprising at least a pass transistor, a source transistor, a sensing transistor and a retention transistor, anda stability compensation circuit comprising a first MOS resistor and a second MOS resistor, coupled with the first MOS resistor, wherein a gate of the second MOS resistor is coupled to a gate of the pass transistor,wherein the stability compensation circuit comprises a second node coupled with a drain of the retention transistor and with a drain of the source transistor, andwherein the first MOS resistor and the second MOS resistor are arranged in parallel with drains of the first and second MOS resistors connected to the second node.
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Abstract
The voltage regulator comprises a regulation loop (2), which comprises at least a pass transistor (18), a source transistor (28), a sensing transistor (22) and a retention transistor (24), and a stability compensation circuit (10), which comprises a first MOS resistor (12) and a second MOS resistor (14) coupled with the first MOS resistor (12). The gate of the second MOS resistor (14) is coupled to the gate of the pass transistor (18).
7 Citations
9 Claims
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1. A voltage regulator comprising:
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a regulation loop comprising at least a pass transistor, a source transistor, a sensing transistor and a retention transistor, and a stability compensation circuit comprising a first MOS resistor and a second MOS resistor, coupled with the first MOS resistor, wherein a gate of the second MOS resistor is coupled to a gate of the pass transistor, wherein the stability compensation circuit comprises a second node coupled with a drain of the retention transistor and with a drain of the source transistor, and wherein the first MOS resistor and the second MOS resistor are arranged in parallel with drains of the first and second MOS resistors connected to the second node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification