Title:
PRE-REGULATOR WITH REVERSE CURRENT BLOCKING
Document Type and Number:
WIPO Patent Application WO2005092061
Kind Code:
A3
Abstract:
An apparatus (10) includes a blocking N-channel MOS (LDMOS) transistor (34) that prevents current flow when the supply connection VDD is reversed. When connected properly, the body diode of transistor (34) conducts to provide a start-up function. A bias generator (14) is employed to enable the low drop-out voltage function, allowing the output voltage to be very close to supply.
Inventors:
BALDWIN DAVID J (US)
BLACKALL ERIC C (US)
BLACKALL ERIC C (US)
Application Number:
PCT/US2005/009592
Publication Date:
January 26, 2006
Filing Date:
March 21, 2005
Export Citation:
Assignee:
TEXAS INSTRUMENTS INC (US)
BALDWIN DAVID J (US)
BLACKALL ERIC C (US)
BALDWIN DAVID J (US)
BLACKALL ERIC C (US)
International Classes:
G05F1/56; H03K17/687; H03K17/06; (IPC1-7): G05F1/40; G05F1/42; G05F1/52; G05F1/565; G05F1/569; G05F1/571; G05F1/573; H02H3/18; H02H3/26; H02H3/42; H02H9/00
Foreign References:
| US5682050A | 1997-10-28 | |||
| US20040239403A1 | 2004-12-02 | |||
| US6678829B1 | 2004-01-13 | |||
| US6590440B1 | 2003-07-08 | |||
| US4390833A | 1983-06-28 | |||
| US5909135A | 1999-06-01 | |||
| US6650100B1 | 2003-11-18 | |||
| US6788130B2 | 2004-09-07 |
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