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:
|