SIMPLE SWITCHER PCB Layout Guidelines:  National Semiconductor - Application Note   (app note added 2/06)

Simple Switching Power Supply:  (Schematic / circuit design added 08/05)

Single FET Controls 2nd LED Array in Switchmode LED Backlight:  Maxim APP1871: Feb03,2003 / (app note added 7/03) -- A design in which the display is backlit (or frontlit) for extended periods needs an efficient circuit that drives the LEDs with a controlled current, and eliminates the wasted power associated with current-limiting resistors. A switch-mode boost design that regulates current instead of voltage accomplishes this purpose.

Single IC Five Output Switching Power Supply System for Portable Electronics:  DN150 -  Design Notes (Linear Technology) (app note added 6/06)

Soft-Start Controller for Switching Power Supplies:  Microchip Application Note - Published 29-Nov-04   (app note added 2/06)

SPICE Predicts Differential Conducted EMI from Switching Power Supplies:  02/03/97 EDN-Design Feature / (added11/05)   Spice not only can predict the exact EMI levels produced by a switched-mode power supply, but also can produce plots that allow you to easily evaluate your design and the effectiveness of the EMI filter.—Christophe Basso, Sinard, France

Switch Mode Battery Eliminator Based on a PIC16C72a [AN701]:  Microchip Application Note - Published 25-Mar-99   (app note added 2/06)

Switch Mode DC Supply:  The switching power supply, shown in the schematic, provides12 volts, at10 amps, maximum, using a discrete transistor regulator with an op-amp functioning as a comparator in the feedback circuit. The supply was constructed in1984 and is variable frequency, as opposed to the pulse width modulator (PWM) controllers used today. (circuit design added 4/02)

Switcher IC hikes Battery Charger's Efficiency:  06/23/94 EDN-Design Ideas / (added 3/03) The adjustable switching-regulator LM2575T-ADJ, IC1, in Fig 1 replaces a power-wasting pnp transistor in the data-book design for the NiCd battery charger IC2, a MAX713. (Its sister device, the MAX712, handles NiMH cells.) IC2 "fast-charges" cells by monitoring the cell's voltage and charging current until they exhibit subtle anomalies that signal a fully charged cell. Because the circuit charges at only a 1.5C rate, the circuit does not need to sense the cell's temperature. (A 1C, or "standard," rate signifies charging the battery to its full capacity in 1 hour.)...  

Switching regulator #2:  (Electronic circuit added 4/05)

Switching regulator forms constant Current source:  05/30/02 EDN Design Ideas  /  (added 1/05)  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....

Switching Regulator Output goes BeLow VREF:  03/17/94 EDN-Design Ideas / (added 03/03) The feedback arrangement of typical switching regulators doesn't allow the regulated outputs to go lower than the reference voltage. If you try to lower the output by modifying the feedback network, the compensation components the manufacturer recommends may no longer stabilize the regulator's error amplifier. An external reference voltage (Fig 1) helps overcome this problem. IC1 regulates by keeping the voltage at its FB pin equal to ....

TB081: Soft-Start Controller for Switching Power Supplies:  Microchip Application Note - Published 29-Nov-04   (app note added 2/06)

Telephone Ring Generator using Switching Power Supply:  (Circuit / schematic design added 6/06)

Two Watt Switching Power Supply:  from 6V to14V (added 6/06)

UltraLow Noise Switching Power Supplies Simplify EMI Compliance:  DN316 -  Design Notes (Linear Technology) (app note added 1/06)

Use a 555 Timer as a Switch Mode Power Supply:  11/14/02 EDN Design Ideas  /  (added 1/05)  Most switch-mode power supplies rely on a PWM (pulse-width-modulated) output that is controlled via voltage feedback. A 555-timer IC can inexpensively perform PWM. The circuit in Figure 1 shows how to turn a 555 PWM circuit into an switch-mode power supply with only one simple equation. The design uses two 555s....

Various Switching Power supplies:  (Electronic circuit added 4/05)