Single-transistor-control low-dropout regulator

Details Single-transistor-control low-dropout regulator Single-transistor-control low-dropout regulator

2007-10-23

2007-10-23

Riley, Shawn (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S281000, C323S224000

Reexamination Certificate

active

11369893

ABSTRACT:
A low-dropout regulator with a single-transistor-control providing improved transient response and stability is disclosed. The single-transistor-control provides a dynamic resistance at the output of the regulator for minimizing undershoot and overshoot, and hence improves transient response. Since the single-control transistor reduces the output resistance of the regulator, the output pole is pushed to a sufficiently high frequency without affecting stability. Therefore, the limited choice of combinations of the output capacitance and its equivalent-series-resistance is substantially relaxed.

REFERENCES:
patent: 6414537 (2002-07-01), Smith
patent: 6759836 (2004-07-01), Black, Jr.
patent: 2005/0242791 (2005-11-01), Rajapandian et al.
Hazuca, et al., “An Area-Efficient, Integrated, Linear Regulator with Ultra-Fast Load Regulation,” 2004 Symposium on VLSI Circuits Digest of Technical Papers, pp. 218-221.

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