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Buck / Step Down Power Supplies, Page 2
Buck:  Page 1,   Page 2,   Page 3,    Page 4,   Page 5

Boost,    Buck,    Buck-Boost,    Switchmode
Power Supplies -- Main Page           Converters -- Main Page
Last Updated on: Monday, October 03, 2011 06:07 PM


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

Boost Controller Drives Buck Converter -  02/03/97 EDN-Design Ideas....By adding an external Switching Transistor, you can use a step up dc/dc Converter to step down voltages to produce an efficient Battery Powered Power Supply, this example Circuit can step down inputs as Low.... [Design Idea by Michael Keagy, Maxim Integrated Products, Sunnyvale, CA]
Buck boost regulator suits battery operation -  4-Sep-03 Issue of EDN  A buck/boost converter can step a voltage up or down. Such a converter is appropriate for battery-powered applications. One application derives.... [Design Idea by Kahou Wong, On Semiconductor, Phoenix, AZ]
Buck Configuration High-Power LED Driver -  Microchip Application Note Published 4-Jan-06....[App Note]
Buck Converter -  (application / block diagram added 6/07)
Buck converter charger also provides system power -  05/22/97 EDN-Design Ideas....Switching Regulator provides  charge voltage setpoint with Current regulation, and second Switching Regulator provides5V.... [Design Idea by Robert Hanrahan, National Semiconductor, Woodcliff Lake, NJ]
Buck converter handles battery-backup system -  24-Apr-03 Issue of EDN  A synchronous buck converter is inherently bidirectional. That is, it transfers energy from input to output as a buck regulator when the output voltage is low, but, when the output voltage is high, the converter acts as a boost regulator, transferring power from output to input.  This Design Idea shows how to use this bidirectional energy transfer to automatically recharge a battery when the mai.... [Design Idea by Haresh Patel, Linear Technology Corp, Milpitas, CA]
Buck converter uses low side PWM IC -  19-Mar-09 Issue of EDN  A voltage-level shifter lets you control voltages above a PWM controller's power source.... [Design Idea by L Haachitaba Mweene, PhD, National Semiconductor Corp, Richardson, TX]
Buck converter works efficiently from phone line -  02/15/00 EDN-Design Ideas.... EDN is migrating links. This link is not verified.  Search the "title" EDN for new link.
Buck Converter-AC Model -  We've already developed a SPICE model for the Buck Converter in a voltage control loop. The controller performed brilliantly holding the output steady under varying load conditions. However, closing the loop is fraught with danger! Without proper insight, Vo can start ringing and oscillating out of control....(spice design added 02/09)
Buck IC boosts battery-voltage for white LED -  24-Apr-03 Issue of EDN  White-light LEDs are finding their way into many markets that incandescent bulbs once served. Flashlights are among the newer applications in which reliability, ruggedness, and ability to control the power draw of the LEDs make these devices attractive. With incandescent bulbs, the power management for the device is a simple on-off switch.... [Design Idea by Robert Kollman, Texas Instruments, Dallas, TX]
Buck or Boost: Rugged Fast 60V Synchronous Controller Does Both -  DN370  Design Notes (Linear Technology)  (app note added 1/06)
Buck regulator and two inductors make dual polarity converter -  20-Mar-03 Issue of EDN  A common problem for power-supply designers is to create a compact, dual-polarity step-down converter. If space and cost are not concerns, the obvious solution is a pair of dc/dc converters, one for each output. But space and cost are almost always issues for communications, data-acquisition, and disk-drive applications.... [Design Idea by Keith Szolusha, Linear Technology Corp, Milpitas, CA]
Buck regulator forms high power, inverting –5V supply -  1-Apr-04 Issue of EDN  Configuring a step-down switching-converter IC as an inverter yields an efficient, high-power, -5V supply that can of deliver currents as high as 4.5A at the 12V input or 3.2A at the 5V input (Figure 1]. Conventional inverting power supplies do their switching using a p-channel MOSFET (Figure 2]. That configuration works well at lower currents, but has limited use above approximately 2A, depend.... [Design Idea by Bruce Denmark, Maxim Integrated Products, Sunnyvale, CA]
Buck Regulator Generates Flexible VTT for PECL -  08/15/97 EDN-Design Ideas....Circuit to generate Output which can both Source and Sink Current -The positive emitter-coupled logic (PECL]in most high-speed clock-distribution and -recovery circuits requires a termination voltage, VTT, that imposes special requirements on  VTT supply. First,  typical switching thresholds for PECL must refer to VDD.... [Design Idea by Bruce D Moore, Maxim Integrated Products, Sunnyvale, CA]
Buck regulator operates without a dedicated clock -  21-Aug-03 Issue of EDN  Most switching regulators rely on a dedicated clock oscillator to determine the switching frequency of operation. A dedicated oscillator circuit within the power controller usually generates the clock signal. A class of hysteretic switching regulators can actually operate at a relatively fixed frequency without a clock, even with changing input-line and output-loading conditions.... [Design Idea by Robert Bell, National Semiconductor, Phoenix, AZ]
Buck Regulator Terminates Fast Data Buses -  07/20/95 EDN-Design Ideas The limitations of 5 and 3.3V CMOS buses are spurring the development of high-speed, low-voltage buses for the next generation of computers. These buses, such as Futurebus and Rambus, require low-voltage supply rails to reduce signal-voltage swings. Other buses, such as CTT (center-terminated transceiver) and HSTL (high-speed transceiver logic), have center termination and, therefore, require a power source that can sink current as well as source it.... [Design Idea by Bruce Moore, Maxim Integrated Products, Sunnyvale, CA]
Buck Regulator uses Step Up Controller -  11/09/95 EDN-Design Ideas....The circuit in Fig 1uses a step-up (boost) dc/dc controller in a negative buck-regulator application. The circuit’s function is to power the laser diode in an optical amplifier/booster unit, a job for which no commercial IC is available. The anode of the laser diode connects to ground, so the supply voltage must be negative and must deliver 160 to 750 mA. Although the boost-regulator IC operates in a buck-regulator circuit, its standard connections permit proper control of Q1. However, you need an op amp.... [Design Idea by Massimo De Marco, Maxim Integrated Products Cusano Milanino, Italy]


Buck:  Page 1,   Page 2,   Page 3,    Page 4,   Page 5
Power Supplies -- Main Page           Converters -- Main Page

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