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Topic: Switching regulator

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	Encyclopedia: Voltage regulator (Site not responding. Last check: 2007-10-17)
		A voltage stabiliser is a type of household mains regulator which uses a continuously variable auto-transformer to maintain an AC output that is as close to the standard or normal mains voltage as possible, under conditions of fluctuation.
		Switching regulators are required when the only power supply is a DC voltage, and a higher output voltage is required.
		That is followed by a linear regulator that generates exactly the desired voltage and eliminates nearly all the noise generated by the switching regulator.
	www.nationmaster.com /encyclopedia/Voltage-regulator (1793 words)

	Encyclopedia: Switching regulator (Site not responding. Last check: 2007-10-17)
		Switching regulators are used as replacements for simpler linear regulators when higher efficiency, smaller size or lighter weight are required.
		If an input range switch is used, the rectifier stage is usually configured to operate as a voltage doubler when operating on the low voltage (~120 vac) range and as a straight rectifier when operating on the high voltage (~240 vac) range.
		The switching is done by MOSFETs, which are a type of transistor with a low on-resistance and a high current-handling capacity.
	www.nationmaster.com /encyclopedia/Switching-regulator (1529 words)

	Switching regulator - Patent 4240134
		A switching regulator according to claim 4, which further comprises an error voltage amplifier having a pair of inputs connected to the output of said rectifying means and a reference DC voltage source and an output connected to the first input terminal of said amplitude comparator.
		A switching regulator according to claim 8, in which said D-type flip-flop has a T-terminal connected to the output of said clock pulse oscillator, a D-terminal connected to the output of said comparing means and a pair of Q and Q output terminals connected to said gate circuit means, respectively.
		The pulse width of the switching signal, which is the output signal from the pulse width modulator 12, is varied in response to the DC voltage obtained at the output terminal 9 to stabilize the DC voltage as a desired constant value.
	www.freepatentsonline.com /4240134.html (3579 words)

	+5V Switching regulator (1) (Site not responding. Last check: 2007-10-17)
		In case of the switching regulator, it inputs only the electric power which is necessary to output from the input by the switching operation.
		The switching regulator which introduces in this page is the step down type and is the one to get the output voltage which is lower than the input voltage.
		The switching regulator of the step up type can be made the voltage which is higher than the input voltage.
	www.interq.or.jp /japan/se-inoue/e_ckt22.htm (177 words)

	Switching regulator - Patent 4208706
		A switching regulator according to claim 1 further including a starter circuit for said inverter, and a voltage of the further separate winding of said output transformer being connected to control the starter circuit.
		The switching regulator of claim 1 in which the first DC voltage is connected as a DC voltage feedback signal to the pulse width modulator means.
		The regulator of claim 4 wherein a voltage feedback circuit is connected to the pulse width modulator means, said voltage feedback circuit comprising a variable voltage divider to which the first DC voltage is connected.
	www.freepatentsonline.com /4208706.html (2991 words)

	Parts explanation of +5V Switching regulator (1)
		This is the regulator which converts the 12V input voltage to the 5V voltage.
		There is a series of the regulator which the output voltage can be changed to in the range from 1.3 V to 37 V but this time, I am using the one of the 5 V fixation.
		In case of the switching regulator, there is comparatively little electric power to lose with the regulator.
	www.interq.or.jp /japan/se-inoue/e_ckt22_3.htm (693 words)

	Finesse Voltage Regulator Noise!
		Many voltage regulators have excessive levels of output noise including voltage spikes from switching circuits and high flicker noise levels from unfiltered references.
		The regulator's noise voltage appears across this resistor so the noise current is shunted to ground through the transistor's collector.
		The regulator's noise is 330 nV per root-hertz at 100 hertz and the circuit reduces this noise to 20 nV.
	www.wenzel.com /documents/finesse.html (1272 words)

	Switching regulator - Patent 4236196
		A switching regulator includes a switching transformer and a switching transistor connected in series between a DC voltage source through the primary winding of the switching transformer.
		A switching regulator according to claim 2, in which said inverted PWM control signal is derived by an inverter connected between the output of said pulse width modulator and one of the pair of input terminals of said second AND gate circuit.
		The base of the switching transistor 5 is connected to the output side of a drive circuit 7 which is supplied with an electric power from a DC power supply source 8 which is, in turn, connected to the output side of the rectifier circuit 3.
	www.freepatentsonline.com /4236196.html (1733 words)

	Switching Regulator : Analog Devices : Switching Regulator (Site not responding. Last check: 2007-10-17)
		No other company is more committed to developing the Switching Regulator that will make the digital future possible.
		ADI designs, manufactures and markets Switching Regulator products as well as high-performance, high-precision signal processing ICs that make pictures vibrant, voices clear, connections continuous and products portable.
		ADI is your source for the Switching Regulator as well as over 10,000 other products that serve the needs of more than 60,000 customers worldwide.
	www.analog.com /switching_regulator.html (278 words)

	Electronic Products (Site not responding. Last check: 2007-10-17)
		Switching regulators are emerging as the "must-have" solution to increase battery efficiency.
		The other was a more expensive switching regulator that provides high efficiency for heavy loads but the tradeoff was poor efficiency for light current loads.
		Regulators that require external resistors to set the output voltage require the placement of two or three additional components.
	www.electronicproducts.com /print.asp?ArticleURL=maron1.mar2003 (782 words)

	Basic Switching-Regulator-Layout Techniques - Maxim/Dallas
		The output capacitor's ground-terminal voltage is important because the load, which is what requires the regulator's accurate output voltage, is usually placed next to the output capacitor—and thus we want the feedback to be referred to that particular part of ground.
		Such isolation is necessary to prevent high-level switching currents from returning to the battery or supply through the same ground-return path as the analog signals.
		When that technique is used, ground currents from the power portion of the circuit could pass through the same ground path as the ground current of the resistor divider, the capacitors used to bypass certain of the controller's pins, the controller's analog ground, or all three, causing their grounds to bounce.
	www.maxim-ic.com /appnotes.cfm?an_pk=2997 (2371 words)

	Switching Regulator (Site not responding. Last check: 2007-10-17)
		Switching regulator can reduce the power consumption and provide more stability.
		Switching regulator provides support for a wide range of the new generation processors like Intel® Pentium® with MMX technology, AMD® K6 and Cyrix® 6x86MX.
		The switching voltage regulator is the way out.
	www.datafilen.dk /support/switch.htm (152 words)

	Switching regulator modules distribute the power: News from SMART Modular Technologies
		The new voltage regulator modules (VRMs) provide a compact, low-cost, efficient, accurate and reliable switching regulator solution designed to meet the requirements of emerging high-current low-output-voltage applications.
		This feature also enables the use of multilayer ceramic capacitors (rather than electrolytic or tantalum components), which use less board space and are better suited for higher frequency power supplies.
		The result is a voltage regulation system that is designed to offer OEMs a reliable and compact solution at a lower cost.
	www.electronicstalk.com /news/sma/sma109.html (402 words)

	Switching regulator/transformer steps down from high voltage (Site not responding. Last check: 2007-10-17)
		The internal shunt regulator is a zener diode, biased by R1 at approximately 2mA (the allowed range is 1mA to 20mA).
		The shunt regulator's output is about 6V, which limits the gate drive to Q1; therefore, Q1 should have a logic-level gate threshold.
		The shunt regulator remains active during shutdown and provides a useful supply voltage for backup memory, a real-time clock, or any general-purpose logic (including a latching on/off switch).
	www.powerdesigners.com /InfoWeb/design_center/Appnotes_Archive/A1813.shtm (471 words)

	Basic switching-regulator-layout techniques - 11/27/2003 - EDN
		This regulator relies on both the reference within the controller IC and the two feedback resistors to generate a specific voltage.
		Such isolation is necessary to prevent high-level switching currents from returning to the battery or the supply through the same ground-return path as the analog signals, which disturbs the ground path of those sensitive signals.
		Positioning the resistors in this way minimizes the length of the trace leading from the midpoint of the resistor divider to the switching regulator's FB pin—a necessity, because both the resistor divider and the input of the internal comparator at the FB pin are high impedances.
	www.reed-electronics.com /ednmag/article/CA336862 (2376 words)

	"The MIC4680 Switching Regulator", WebElectric Magazine - 4Q00 (Site not responding. Last check: 2007-10-17)
		I'm sure there was a spike there, but I couldn't see how large it was, and it must have been fast.
		Before we put the doors back together, I tried the lock switches, and sure enough, the problem was gone.
		There was some spike blasting through the circuit, probably through the 5 volt regulator, and I'm fortunate that it didn't fry the processor.
	www.webelectricmagazine.com /00/4/switcher.htm (580 words)

	Switching regulator rides automotive fluctuations: News from Linear Technology Corp
		The LT1977 is a high-voltage 500kHz step-down switching regulator within an input range of 3.3 to 60V, making it compatible with automotive applications.
		The LT1977 is the latest addition to Linear Technology's growing family of high-voltage switching regulators featuring burst mode operation.
		Efficiency is optimised over a wide output current range by employing burst mode operation at low currents, using the output to bias the internal circuitry and a supply boost capacitor to fully saturate the power switch.
	www.electronicstalk.com /news/lne/lne107.html (405 words)

	Switched-mode power supply : Switching regulator (Site not responding. Last check: 2007-10-17)
		A switched-mode power supply, or SMPS or switching regulator, is an electronic power supply circuit that attempts to produce a smoothed, constant-voltage, output from a varying input voltage.
		Switched-mode power supplies may be designed to convert from alternating current or direct current, or both.
		The output voltage is compared to a reference voltage and the result used to alter the switching frequency or duty cycle of the inverter oscillator, which affects its output voltage.
	www.eurofreehost.com /sw/Switching_regulator.html (341 words)

	EDN Access -- 03.17.94 Switching-regulator output goes below V_REF (Site not responding. Last check: 2007-10-17)
		The feedback arrangement of typical switching regulators doesn't allow the regulated outputs to go lower than the reference voltage.
		The levels at dc-8.5 mA in the IC and 1.5 mA in the zener diodeÑincrease somewhat with the switching frequency.
		Other regulators that have lower voltage drops across the switch will have higher efficiencies at lower load currents.
	www.edn.com /archives/1994/031794/06di5.htm (327 words)

	powerZONE Product Review: Linear Technology LT1941 Triple Switching Regulator
		Each regulator generates a power good signal when its output is in regulation, easing power supply sequencing and interfacing with microcontrollers or DSPs.
		The first switch is rated at 3 A step-down, the second at 2 A step-down, and the third switch is rated at 1.5 A in either inverter and/or boost modes.
		The switching is in antiphase between the first two switches so that the ripple is not only minimized but also predictable.
	www.analogzone.com /pwrp0628.htm (648 words)

	ST \| Switching regulator
		The switching regulators operate at 200kHz or 300kHz using the internal oscillator or at higher frequencies using an external synchronization source....
		The switching voltage regulators work by transferring energy in discrete packets through a low resistance switch, so it is possible to step-up, step-down or invert....
		They are monolithic switching regulators designed in BCD OFF-LINE technology, able to operate with a wide range input voltage and to deliver up to 15 W output power....
	www.st.com /site-index/Switching-regulator.htm (1189 words)

	Switching regulator noise
		The problem is that the regulator seems to be generating quite a bit of RF noise.
		I have since read that this is a common problem with switching regulators.
		This is not effecting the opertation of the robots electronics, but is causing a lot of white noise on the TV in the next room.
	www.cyber-spy.com /electronics-design/electro-25357-29917.html (141 words)

	Switching regulator (2) (Site not responding. Last check: 2007-10-17)
		I introduce the switching regulator which used MC34063A of the MOTOROLA,Inc. in this page.
		The 1.5-A output current can be gotten without the heatsink in spite of this size.
		This regulator can do the switching operation of 100 kHz by the value of the outside capacitor.
	www.interq.or.jp /japan/se-inoue/e_ckt23.htm (46 words)

	RunRyder - Switching Regulator Efficiency Discrepancy!
		In defense of Kool Flight, every switching regulator is going to have a varying efficiency based on the input and output conditions.
		the UBEC is switching, the Fromeco regulators are linear.
		The UBEC is a switching regulator and the Fromeco is a linear.
	www.runryder.com /helicopter/t189863p1 (1780 words)

	STMicroelectronics \| 10A SWITCHING REGULATOR - L4970A
		CIRCUIT OPERATION (refer to the block diagram) The L4970A is a 10A monolithic stepdown switching regulator working in continuous mode realized in the new BCD Technology.
		A typical switching time of the current in the DMOS transistor is 50ns.
		Switching Frequency Voltage Stability of Swiching Frequency Temperature Stability of Swiching Frequency Maximum Operating Switching Frequency Vi = 15V to 45V Tj = 0 to 125°C Vo = Vref; R4 = 10K Io = 10A; C9 = 1nF 500 Vi = 2VRMS; Io = 5A f = 100Hz; Vo = Vref 11 80 Min.
	www.st.com /stonline/books/ascii/docs/1361.htm (2051 words)

	Recommend a switching regulator? (Site not responding. Last check: 2007-10-17)
		I have a 12V SLA battery that I am using to power a microcontroller.
		I'm ignorant of how a regulator works, but "switching" to me makes it
		Switchers can use caps but I've not seen a switching regulator with a
	www.electronics-forum.info /general/Recommend_a_switching_regulator_119519.html (248 words)

	Vehicular 5V Power
		Unfortunately, designing a bullet-proof 5-volt regulated power supply for use in the harsh vehicular power environment can be difficult.
		For our VFD-420, the switching regulator is the right choice, since the linear regulator would be operating close to its max output (from a heat-dissipation standpoint).
		The switching regulator used in the high-current version is a product of PowerTrends Inc. The author based his circuit on a PowerTrends application note, "Vehicular Power Adapter Using ISRs."
	www.seetron.com /an_vpwr1.htm (272 words)

	Help: designing switching regulator IC (input 3v, output 5v)
		But it cannot drive heavy current load, I find the switch resistance is too bign (I have chosen big switch).
		MC34063 is a regulator itself, I cannot use it.
		It seemed to me you were trying to design a switched mode circuit using an exsisting IC and not design an new IC for switched mode.
	www.edaboard.com /ftopic79202.html (638 words)

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