Non-invasive load current sensing in low dropout (LDO)...

Details Non-invasive load current sensing in low dropout (LDO)... Non-invasive load current sensing in low dropout (LDO)...

2007-11-12

2010-06-01

Laxton, Gary L (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S273000

Reexamination Certificate

active

07728565

ABSTRACT:
A low dropout (LDO) voltage regulator includes an output terminal for providing a regulated voltage output to a load, and a plurality of PFETs connected in parallel. Each PFET drains a level of current and the sum of the levels of current are provided as a current output at the output terminal. The LDO voltage regulator also includes a feedback network coupled to the output terminal for providing a voltage feedback signal, and an error amplifier coupled between the plurality of PFETs and the feedback network for sensing a differential voltage. The error amplifier includes an output voltage which is provided to the plurality of PFETs for adjusting the drain of current from each PFET. A summation of the drains of current from each PFET is provided as the current output to regulate the voltage output at the output terminal. Each PFET drains a current level of I0
and the summation of the drains of current is the current output I0.

REFERENCES:
patent: 4254372 (1981-03-01), Moore, Jr.
patent: 5012178 (1991-04-01), Weiss et al.
patent: 5191278 (1993-03-01), Carpenter
patent: 6201375 (2001-03-01), Larson et al.
patent: 6232753 (2001-05-01), Pasotti et al.
patent: 6522111 (2003-02-01), Zadeh et al.
patent: 6614706 (2003-09-01), Feurle
patent: 6765374 (2004-07-01), Yang et al.
patent: 6836095 (2004-12-01), Fogg
patent: 6952091 (2005-10-01), Bansal
patent: 7102337 (2006-09-01), Wheeler et al.
patent: 7385377 (2008-06-01), Pisasale et al.

Affiliated with

Also associated with

Rating

Non-invasive load current sensing in low dropout (LDO)... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Non-invasive load current sensing in low dropout (LDO)..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-invasive load current sensing in low dropout (LDO)... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4239162