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LDO Buck/Boost 2 Sync Buck Sync Boost Reference Design - LDO, Buck/Boost, 2
Sync. Buck, Sync. Boost with Vin 2.7-4.2 V LiION or 4.5-6.5 V adapter. Multiple output
voltages of 1.5 V, 2.5 V, 3.3 V and 8 V. The total output power is 5.5 W. (added 3/05)
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LED Buck PFM - This is a proof of concept circuit which needs improvement.
The part values shown will run a high efficiency red LED with a Vf of 1.9V from only 2
nicads, right down to 2 volts. For a white LED you will need more batteries and you
must increase the 1.0K resistor to a higher value. Current sensing at a mere....
[Circuit by Stepan Novotill] |
LED HeadLamps - This article includes circuits of DC-DC LED drivers step
downs to run LEDs on less than Battery Volts, Boost for above. (added 4/02)
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LM2675 5.0EVAL 1 Amp Step Down High Efficiency Simple Switcher Evaluation Board -
The LM2675-5.0EVAL evaluation board is a fully-assembled and tested surface-mount
regulator that provides a 5V±1.5% output at up to 1A, from an input of 8V to 40V. The
overall efficiency is typically as high as 90%. The operating temperature range is 0°C
to +85°C. (app note added 3/05) |
Low EMI Synchronous DC/DC Step-Down Controllers offer Programmable Output Tracking
- DN382 Design Notes (Linear Technology) (app note added 1/06)
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Lower dc/dc converter ripple by using optimum capacitor hookup - 31-Oct-02
Issue of EDN Low-ripple-voltage positive-to-negative dc/dc converters find use
in many of today's high- frequency and noise-sensitive disk drives, battery-powered
devices, portable computers, and automotive applications. Like a positive buck
converter, a positive-to-negative converter can have low output-ripple voltage if you
place the bulk input capacitor between VIN and VOUT rather than between VIN and gr....
[Design Idea by Keith Szolusha, Linear Technology Corp, Milpitas, CA] |
LT1074/LT1076 Design Manual - AN44 Linear TechnologyThis note discusses the
use of the LT107)4 and LT107)6 high efficiency switching regulators. These regulators
are specifically designed for ease of use. This application note is intended to
eliminate the most common errors that customers make when using switching
regulators....(app note added 2/06) |
LT1339 Design Manual - AN73 Linear TechnologyThis application note contains
detailed design information to allow the reader to craft switching regulators using
the LT1339 high power synchronous DC/DC converter. The note provides expanded pin
descriptions for the LT1339 as well as easy-to-use graphical tools....(app note added
1/06) |
LT1777 High Voltage Low Noise Buck Switching Regulator - DN212 Design
Notes (Linear Technology) (app note added 1/06) |
LTC1265: A New High Efficiency Monolithic Buck Converter - DN105
Design Notes (Linear Technology) (app note added 1/06) |
Monolithic Step-Down Regulator Withstands the Rigors of Automotive Environments &
Consumes Only 100µA of Quiescent Current - DN378 Design Notes (Linear
Technology)....[App Note] |
Monolithic Synchronous Step-Down Regulators Pack 600mA Current Rating in a ThinSOT
Package - DN300 Design Notes (Linear Technology) (app note added 6/06)
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No Design Switching Regulator 5V 5A Buck Step Down Regulator - DN48
Design Notes (Linear Technology) (app note added 1/06) |
No Design Switiching Regulator 5V Buck/Boost Positive to Negative Regulator -
DN49 Design Notes (Linear Technology) (app note added 1/06) |
Notebook Power Supply has Two Outputs - 03/03/94 EDN-Design Ideas....The
notebook-computer supply in Fig 1 powers the 5V logic and derives an adjustable -24V
supply for an LCD's backplane. The design uses only a high-efficiency buck regulator
(Si9150]and an NMOS/PMOS, dual-power-FET chip set (Si9943].... [Design Idea by Steven
C Hageman, Calex Manufacturing Co Inc, Concord, CA] |
Obtain a lower DC voltage from a higher voltage power supply - 06/08/06
EDN-Design Ideas....Linear stepdown regulator saves watts.... EDN is migrating links.
This link is not verified. Google the "title" EDN for new link. |
Obtain higher voltage from a buck regulator - 29-May-03 Issue of EDN
Several semiconductor vendors'current-mode buck controllers have input-voltage ranges
of 30 to 36V but have output-voltage ranges from the reference voltage to
approximately 6V. This output-voltage constraint arises from the
common-mode-voltage limitation of the current-sense amplifier. In real-world
applications, the power-supply designer must be able to generate high output voltage
for printe.... [Design Idea by Ajmal Godil, Micrel Semiconductor, San Diego, CA] |
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