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Scheme adds sequencing and shutdown control to regulator - 30-Oct-03 Issue of
EDN Modern microprocessor- or FP-GA-based circuits require separate and independent
power-supply voltages for the core and the I/O circuits. Some devices require stringent
control of the turn-on characteristics and sequencing of these multiple power supplies to
avoid internal parasitic current flows and consequent latch-ups.... [Design Idea by Said
Jackson, Equator Technologies Inc, Campbell, CA] |
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Secondary Side Dual Output Controller Tightly Regulates Two Isolated Outputs -
DN1000 Design Notes (Linear Technology)....[App Note] |
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series regulator with Q900 - This is a series regulator with Q900 being the
control element, Q901 a driver, and Q902 an error amp. ZD900 forms the emitter reference
voltage source. Since the generated high voltage and other voltages are linked by means of
the magnetic field of T900, any change in H.V. will be reflected back to all of the other
voltages.... |
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Servo loop improves linear regulator efficiency - 8-Jul-04 Issue of EDN
Linear regulators are easy to implement and have better noise and drift characteristics
than switching approaches. Their largest disadvantage is inefficiency excess energy
dissipated as heat. Several well-known techniques are available to minimize the
input-to-output voltage across a linear regulator.... [Design Idea by Aurel Gontean,
Technical University, Timisoara, Romania] |
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Simple High Efficiency Step-Down Switching Regulator - DN73 Design Notes
(Linear Technology) (app note added 1/06) |
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Simple Regulator Provides ±12V - 10/23/97 EDN Design Idea Simple circuit
can provide ±12V from a5V input using only one switching-regulator IC and a few
off-the-shelf [Design Idea by Musiri Shrivathsan, National Semiconductor Corp, Santa
Clara, CA] |
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Simple temperature regulated FAN speed Controller - This regulator uses a P-FET
to change the positive supply voltage to a FAN an NTC resistor mounted on the device that
needs cooling will change the fan speed, the temperature on the heat sink will therefore
be constant, while the FAN speed will change, depending on power disipated The RPM output
signal from most FAN types will continue to function,....(schematic added 05/08)
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Simple Ultra-Low Dropout Regulator - DN32 Design Notes (Linear Technology)
(app note added 1/06) |
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Simple Variable Voltage Source - The high current regulator below uses an
additional winding or a separate transformer to supply power for the LM317 regulator so
that the pass transistors can operate closer to saturation and improve efficiency. For
good efficiency the voltage at the collectors of the two parallel 2N3055 pass
transistors....(added 4/05) |
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Small Motor Speed Regulator - Reverse engineered circuit diagram of a motor
speed regulator out of a portable tape recorder containing a single motor for all
functions. This circuit works amazingly well, keeping the motor speed constant
regardless of shaft load and battery voltage.... [Circuit by Stepan Novotill] |
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Solar panel regulator - A simple but good linear shunt voltage regulator for
solar panels, that includes deep-discharge protection. This design is for 12V
systems with panels delivering up to 7A, but it can be easily scaled for other sizes. I
have built several of these regulators. [Manfred Mornhinweg] |
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SOT-23 Switching Regulator with Integrated 1A Switch Delivers High Current Outputs in a
Small Footprint - DN232 Design Notes (Linear Technology) (app note added
1/06) |
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Step-Down Switching Regulators - AN35 Linear Technology Discusses the LT107)4,
an easily applied step-down regulator IC. Basic concepts and circuits are described along
with more sophisticated applications. Six appended sections cover LT107)4 circuitry
detail, inductor and discrete component selection, current measuring techniques,
efficiency considerations and other topics....(appnote 2/06) |
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Switching Regulator Circuit Collection - AN30 Linear Technology Switching
regulators are of universal interest. Linear Technology has made a major effort to address
this topic. A catalog of circuits has been compiled so that a design engineer can swiftly
determine which converter type is best. This catalog serves as a visual index to be
browsed through for a specific or general interest. |
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Switching regulator drives robot motor - 05/13/99 EDN-Design Ideas....The
circuit in Figure 1 shows an example of how you can use an integrated switching regulator
(ISR] to efficiently vary the speed of a permanent-magnet dc motor. In this application,
the rotating head of a robot senses the presence of an oncoming object (perhaps a human].
If the robot senses an object, it slows the rotation....PDF contains many circuits, scroll
to find this one.… [Design Idea by Donald Comiskey, Power Trends Inc, Warrenville, IL] |
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Switching regulator forms constant-current-source - 30-May-02 Issue of EDN
Many applications require current sources rather than voltage sources. When you need a
high-current source, using a linear regulator is inadvisable, because of the high power
dissipation in the series resistor. To solve the wasted-power problem, you can use a
switch-mode regulator. The circuit of Figure 1 uses IC1, an LM2576 adjustable
regulator.... [Design Idea by Stefan Strozecki, Institute of Telecommunications,
Bydgoszcz, Poland] |
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Switching Regulator Generates Both Positive & Negative Supply with a Single Inductor:
Design Notes Linear Technology added 01/06 - DN47 Design Notes (Linear
Technology) (app note added 2/06) |
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Switching Regulators for Poets - AN25 Linear Technology Subtitled "A Gentle
Guide for the Trepidatious," this is a tutorial on switching regulator design. The text
assumes no switching regulator design experience, contains no equations, and requires no
inductor construction to build the circuits described. Designs detailed include flyback,
isolated telecom, off-line, and others.... |
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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 3/05) |
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| Regulators:
#'s A
B - C D -
H I - L
M - Q R -
S T - Z |
