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Buck / Step Down Power Supplies, Page 5
Buck: Page 1, Page 2, Page 3,
Page 4, Page 5
Last Updated on:
Friday, August 29, 2008 02:33 PM
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Power Supplies -- Main Page
Converters -- Main Page |
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electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:
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Obtain higher Voltage from a Buck regulator: 05/29/03 EDN Design Ideas
/ (added 1/05) 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...... |
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Off Line Buck Regulator Cuts Costs Leadtime: 10/26/95 EDN-Design Ideas /
(added 3/03) |
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Positive regulator makes negative DC/DC converter: 12/26/02 EDN Design Ideas
/ (added 1/05) Power-supply designers can choose from a plethora of available positive buck regulators that can also serve as negative
boost dc/dc converters. Some buck regulators have a negative-feedback reference voltage expressly for this purpose, but ICs that have
positive-reference feedback voltages far outnumber these negative-feedback regulators.... |
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Power Management in Portable Applications: Understanding the Buck Switchmode Power
Converter: Microchip Application Note - Published 18-Jul-01 (app note added 2/06) |
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Selecting Inductors for Buck Converters: National Semiconductor - Application
Note (app note added 7/06) |
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'Shoot-through' in Synchronous Buck Converters / AN-6003: Fairchild
Application Notes / (app note added 6/06) |
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Simple Sychronous Buck Regulator: MCP1612: Microchip Application Note -
Published 14-Jan-05 (app note added 2/06) |
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Solar Step Down Regulator: (Circuit / schematic design added 6/06) |
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ST1S03 buck converters for hdd power supplies: AN2093 2. INTRODUCTION Purpose
of This AppNote is to provide a brief summary of the specifications and the functionality of the application board.... (app note added 7/06) |
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Stepdown converter uses a ceramic output capacitor: 06/07/01EDN-Design Ideas
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Sychronous Buck Regulator: MCP1612: Microchip Application Note -
Published 14-Jan-05 (app note added 2/06) |
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Sync. Buck with Integrated FET Forward Dual Sync. Buck Reference Design:
Sync. Buck with Integrated FET, Forward, Dual Sync. Buck with Vin of 48. Vout of 15 V, 3.3 V, 1.8 V, 1.5 V. The output power is 47 W. (added 6/06) |
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Synchronous Buck circuit produces negative Voltage: 02/06/03 EDN Design Ideas
/ (added 1/05) Many electronic systems require both positive and negative voltages to operate properly. Generating an efficient,
low-voltage positive output from a higher voltage input typically entails the use of a synchronous buck regulator. But when generating a negative
output voltage from a positive input voltage, you'd typically use a flyback topology, especially at higher output currents.... |
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Synchronous buck MOSFET loss calculations with Excel model / AN-6005:
Fairchild Application Notes / (app note added 6/06) |
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Synchronous Buck Reference Design #2: This reference design is synchronous
buck-boost converter that can deliver up to 3.8 A of continuous current at -5 V from a 5 V input. This topology uses a synchronous buck controller
(TPS5103) referenced to the negative output rail. The synchronous MOSFETs allow this design to achieve a peak efficiency of 88%. In addition, the
TPS5103 provides a soft-start function and over-current protection. (added 3/05) |
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Synchronous Buck Reference Design: This reference design is a 5Vdc input to
1.65V @ 1A output synchronous buck converter. The controller is the TPS40003 operating at 600KHz. The controller features Predictive Gate Drive,
which minimizes the bottom FET body diode conduction time. This provides the benefit of increased efficiency when compared to a standard gate
drive method. Very low output ripple voltage and excellent transient load performance are achieved with this design. (added 3/05) |
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Synchronous Flyback Circuit Provides High Efficiency Conversion: 07/22/04 EDN
Design Ideas / (added 1/05) Buck regulators are usually the first choice when you design nonisolated step-down regulators unless the
ratio of VIN to VOUT is greater than 10, the input voltage is high, or both. Low duty cycle can be problematic for FET drivers and cause
current-mode control loops to lose control. Efficiency can fall dramatically to 60 to 70% at low VOUT and current of only a few amps. |
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ThinSOT Micropower Buck Regulator has Low Output Ripple: DN373 - Design
Notes (Linear Technology) (app note added 6/06) |
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Three parts provide tenfold increase in Switcher Current: 08/22/02 EDN Design
Ideas / (added 1/05) Industrial-control circuits often derive their power from widely varying sources that can exceed the 40V
maximum rating of popular switching ICs. This Design Idea presents a simple, flexible, and inexpensive buck switcher that converts an input
voltage as high as 60V to 5V at several amps. The circuit is unique in that it boosts current with almost no compromise in performance, size, or
cost.... |
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Tiny Buck Regulator Accepts Inputs from 3.6V to 25V and Eliminates Heat Sink:
DN268 - Design Notes (Linear Technology) (app note added 6/06) |
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Tiny Step-Up/Step-Down Power Supply Delivers 3.3V at 1.3A in Battery-Powered Devices:
DN271 - Design Notes (Linear Technology) (app note added 1/06) |
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Tiny Versatile Buck Regulators Operate from 3.6V to 36V Input: DN367 -
Design Notes (Linear Technology) (app note added 6/06) |
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TSM108 Evaluatin Board 12V to 6V DC/DC Converter: The TSM108 is a step down
controller that features constant voltage and constant current regulation.The Evaluation Board was designed to allow different converter
configurations. Several options for power semiconductor footprints are available on the PCB in order to make it adaptable to a wide range of
converter output power. In a first step, this application note will describe the typical application. Then the various options available on the
Evaluation Board PCB will be explained. (app note added 6/06) |
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Two AA cells power step down regulator: 01/07/99 EDN-Design Ideas /
(Schematic / circuit added 10/02) [Note: File contains multiple circuits - scroll to find this circuit] DC/DC conversion is
particularly challenging when both the input and output voltages are low. Step-up ICs that operate with inputs lower than 1V are available, but
step-down ICs that accept input voltages near 2V are not. Thus, providing efficient power for the low-voltage CPU in a handheld product can be a
problem if the power source is a two-cell AA battery..... |
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Wide range regulator delivers 12V 3A output from 16 to 100V source: 06/23/05
EDN Design Ideas / (added 10/05) Buck regulator tackles high input voltages. |
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Wide-Input, High Voltage Buck Converter: National Semiconductor - Application
Note (app note added 2/06) |
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