Add an auxiliary voltage to a buck regulator: 10/31/2002  EDN - Design Ideas / You often need more than one regulated output voltage in a system. A frequently used and reasonably simple way to create this auxiliary output voltage is to add a second winding to the output inductor, creating a coupled inductor or a transformer, followed by a diode to rectify (peak-detect) this output voltage..

Buck boost regulator suits battery operation : 09/04/03  EDN-Design Ideas / A buck/boost converter can step a voltage up or down. Such a converter is appropriate for battery-powered applications. One application derives a regulated 14.1V at 1A from 12V solar panels with 9 to 18V variation. In this type of battery application, efficiency is an important factor; hence, this design uses an inexpensive synchronous-rectifier-based MC33166/7 circuit....

Buck regulator operates without a dedicated clock : 08/21/03  EDN-Design Ideas / 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....

Buck Regulator Terminates Fast Data Buses: 07/20/95 EDN-Design Ideas

Buck Regulator uses Step up Controller: 11/09/95 EDN-Design Ideas

Buck/Boost Charge Pump Regulator Powers White LEDs From a Wide 1.6 Volt to 5.5 Volt Input: Maxim Application Note #1021

Finesse Regulator Noise:

For Just Pennies, Boost Current From Negatimve Linear Regulator : 11/25/02 Electronic Design - Ideas for Design / Adding four components to a negative linear regulator (U1 in the figure) increases the load current by 60%. The additional pass transistor and associated resistors cost less than $0.17 in 1000-unit...  

Get buck boost performance from a boost regulator: 07/11/2002  EDN - Design Ideas /  The SEPIC (single-ended, primary-inductance-converter) topology is generally a good choice for voltage regulators that must produce an on output voltage that falls in the middle of the input-voltage range, such as a 5V output from a 2.7 to 6V input, The topology has some disadvantages, however. The efficiency of a SEPIC circuit fares worse than that of buck and boost regulators, and SEPIC desig....

Obtain higher voltage from a buck regulator: 05/29/03  EDN-Design Ideas / 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......

Positive regulator makes dual negative output converter: 06/26/03  EDN-Design Ideas / Some systems, such as optical networks, require more than one negative voltage. A common procedure is to boost the main negative supply of 5V to 10V and then reduce it with a linear regulator to 9V. The 5V itself comes from a positive supply, typically 5 or 12V. Independently creating each of the two negative voltages requires the use of two switching-regulator ICs...

Positive regulator makes negative dc/dc converter: 12/26/2002  EDN - Design Ideas /  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 regula

Simple Regulator has one Active Part: 03/16/95 EDN-Design Ideas

Supply Saves Circuits From Lax Predecessors: 11/23/94 EDN-Design Ideas

Two ACels Power Step Down Regulator: 01/07/99 EDN-Design Ideas / PDF contains multiple circuits - scroll to find this circuit.

Ultra Low Drop Linear Regulator: