US5736843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Efficient ultra low drop out power regulator
Assignee: RPX Corp
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Filing: 1995-04-27
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Granted: 1998-04-07
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Expires: 2015-04-27
Abstract
Abstract An ultra low drop out power regulator is described. The power regulator may be used, for example, where a dynamically fast, and electrically clean power supply at the point of use is required. The power regulator is provided as a single part with two input voltages. The higher voltage input drive the output stage so that ultra low drop out is achieved. The disclosed regulator is therefore more efficient, resulting in less heat dissipation. The regulator is packaged in a stand up package thereby reducing board space. By use of a stand up package, air flow to other components is not blocked.
Inventors
- 👤 Dilip A. Amin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:31
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
59 words
A power regulator comprising: a first input coupled to a first input voltage; a second input coupled to a second input voltage, said second input voltage greater than said first input voltage; and an output stage having an output, said output stage coupled to said first input, said output stage driven by a driver coupled to said second input.
Claim 2
Dependent Claim
59 words
A power regulator comprising: a first input coupled to a first input voltage; a second input coupled to a second input voltage, said second input voltage greater than said first input voltage; and an output stage having an output, said output stage coupled to said first input, said output stage driven by a driver coupled to said second input.
Claim 3
Dependent Claim
17 words
The power regulator as described in claim 1 wherein said output stage comprises a first bipolar transistor.
Claim 4
Dependent Claim
54 words
The power regulator as described in claim 2 wherein said first bipolar transistor comprises an npn bipolar transistor, wherein said first input is coupled to a collector of said first transistor, said driver is coupled to a base of said first transistor, and said output is coupled to an emitter of said first transistor.
Claim 5
Dependent Claim
16 words
The power regulator as described in claim 2 wherein said driver comprises a second bipolar transistor.
Claim 6
Dependent Claim
16 words
The power regulator as described in claim 3 wherein said driver comprises a second bipolar transistor.
Claim 7
Dependent Claim
77 words
The power regulator as described in claim 2 wherein said driver comprises a second bipolar transistor and a third bipolar transistor, wherein said second input is coupled in parallel to a collector of said second transistor and an emitter of said third transistor, wherein a collector of said third transistor is coupled to a base of said second transistor, and wherein an emitter of said second transistor is coupled to said base of said first bipolar transistor.
Claim 8
Dependent Claim
19 words
The power regulator as described in claim 1 wherein said power regulator is packaged in a single in-line package.
Claim 9
Dependent Claim
34 words
The power regulator as described in claim 1 wherein said first input voltage is in the range of approximately 3.1-3.5 V and said second input voltage is in the range of approximately 4.7-5.3 V.
Claim 10
Dependent Claim
25 words
The power regulator as described in claim 1 wherein a voltage drop between said first input and said output is approximately 0.6 V or less.
Claim 11
Dependent Claim
25 words
The power regulator as described in claim 6 wherein a voltage drop between said first input and said output is approximately 0.6 V or less.
Claim 12
Dependent Claim
81 words
A computer system comprising a power regulator, said power regulator comprising: a first input coupled to a first input voltage; a second input coupled to a second input voltage, said second input voltage greater than said first voltage; an output stage having an output, said output stage coupled to said first input, said output stage driven by a driver coupled to said second input; and, a load requiring a high speed, electrically dean power supply, said load coupled to said output.
Claim 13
Dependent Claim
81 words
A computer system comprising a power regulator, said power regulator comprising: a first input coupled to a first input voltage; a second input coupled to a second input voltage, said second input voltage greater than said first voltage; an output stage having an output, said output stage coupled to said first input, said output stage driven by a driver coupled to said second input; and, a load requiring a high speed, electrically dean power supply, said load coupled to said output.
Claim 14
Dependent Claim
17 words
The computer system as described in claim 11 wherein said output stage comprises a first bipolar transistor.
Claim 15
Dependent Claim
54 words
The computer system as described in claim 12 wherein said first bipolar transistor comprises an npn bipolar transistor, wherein said first input is coupled to a collector of said first transistor, said driver is coupled to a base of said first transistor, and said output is coupled to an emitter of said first transistor.
Claim 16
Dependent Claim
16 words
The computer system as described in claim 12 wherein said driver comprises a second bipolar transistor.
Claim 17
Dependent Claim
16 words
The computer system as described in claim 13 wherein said driver comprises a second bipolar transistor.
Claim 18
Dependent Claim
77 words
The computer system as described in claim 12 wherein said driver comprises a second bipolar transistor and a third bipolar transistor, wherein said second input is coupled in parallel to a collector of said second transistor and an emitter of said third transistors, wherein a collector of said third transistor is coupled to a base of said second transistor, and wherein an emitter of said second transistor is coupled to said base of said first bipolar transistor.
Claim 19
Dependent Claim
19 words
The computer system as described in claim 11 wherein said power regulator is packaged in a single in-line package.
Claim 20
Dependent Claim
34 words
The computer system as described in claim 11 wherein said first input voltage is in the range of approximately 3.1-3.5 V and said second input voltage is in the range of approximately 4.7-5.3 V.
Claim 21
Dependent Claim
25 words
The computer system as described in claim 11 wherein a voltage drop between said first input and said output is approximately 0.6 V or less.
Claim 22
Dependent Claim
25 words
The computer system as described in claim 16 wherein a voltage drop between said first input and said output is approximately 0.6 V or less.
Claim 23
Dependent Claim
18 words
The computer system as described in claim 11 wherein said load is a high speed bus termination line.
Claim 24
Dependent Claim
32 words
The computer system as described in claim 21 wherein said high speed termination line is a termination line of a microprocessor having a clock speed in the range of approximately 100-400 MHz.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-04-06 | 2001-10-06 | 2002-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-04-06 | 2005-10-06 | 2006-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-04-06 | 2009-10-06 | 2010-04-07 | $7700.00 | Window Closed / Lapsed |