IC Voltage Regulators Specifications

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General Specifications

	Regulator Category
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	Linear Regulator		Linear voltage regulators use an active pass element (bipolar or MOSFET) to drop the input voltage down to the regulated output voltage. A linear regulator operates by using a voltage-controlled source to force a fixed voltage to appear at its output terminal. A control circuitry monitors this output voltage and adjusts the current source to hold the output voltage to a desirable value. The control circuitry in general contains a pass device (NPN Darlington pair driven by a PNP transistor, for instance).
	Switching Regulator		Switching voltage regulators are circuits that use an inductor, a transformer, or a capacitor as an energy-storage element to transfer energy from input to output in discrete packets. Feedback circuitry regulates the energy transfer to maintain a constant voltage within the load limits of the circuit. The basic circuit can be configured to step up (boost), step down (buck), or invert output voltage with respect to input voltage. Switching regulators operate by passing energy in discrete packets over a low-resistance switch, so they can step up, step down, and invert. In addition, they offer higher efficiency than linear regulators. The one disadvantage of the switching regulator is noise. Any time charge is moved in discrete packets, noise or ripples are created. But noise can often be minimized using specific control techniques and through careful component selection.
	Other		Other unlisted voltage regulator types.
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	Output Voltage Type
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	Fixed		The regulated output voltage is fixed.
	Adjustable		The regulated output voltage can be adjusted to a value within a specified range.
	Other		Other unlisted output types.
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Performance

	Regulated Output Voltage (Volt)		The output regulated voltage (Volt) represents minimum and maximum amounts in continuous mode (DC).
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	Output Current (IOUT)		The output current (IOUT) is measured under specified conditions.
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	Dropout Voltage (VD)		The dropout voltage is the minimum voltage drop across the regulator to maintain output voltage regulation. It is important to know that a voltage regulator that operates with smallest voltage across it dissipates the least internal power and has the highest efficiency. The LDO type requires the least voltage across it, while the standard type requires the most.
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	Quiescent Current (IQ)		Quiescent current (IQ) is measured in amperes (A) during the idling state. Quiescent current is also called operating current or ground current. Quiescent current never makes it to the load, but flows from the battery to power the regulator itself.
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	Operating Temperature:		This is the ambient temperature range through which the device is designed to operate.
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Other Specifications

	IC Package Type
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	DIP / CDIP / PDIP		Dual in-line package (DIP) is a type of DRAM component packaging. DIPs can be installed either in sockets or permanently soldered into holes extending into the surface of the printed circuit board. Ceramic dual in-line package (CDIP) consists of two pieces of dry pressed ceramic surrounding a "DIP formed" lead frame. The ceramic / LF / ceramic system is held together hermetically by frit glass reflowed at temperatures between 400° - 460° centigrade. Plastic dual in-line package (PDIP) is widely used for low cost, hand-insertion applications including consumer products, automotive devices, logic, memory ICs, micro-controllers, logic and power ICs, video controllers commercial electronics and telecommunications.
	DPAK (TO-252)		Discrete package or deca-watt (DPAK).
	PPAK (QFN-16)		Power packaging (PPAK).
	QFP		Quad flat packages (QFP) contain a large number of fine, flexible, gull wing shaped leads. Lead width can be as small as 0.16 mm. Lead pitch is 0.4 mm. QFPs provide good second-level reliability and are used in processors, controllers, ASICs, DSPs, gate arrays, logic, memory ICs, PC chipsets, and other applications.
	SC-70		SC-70 is one of the smallest available IC packages. It is used in cellular phones, PDAs, electronic games, laptops and other portable and hand-held applications where space is extremely limited.
	SO-8		Small outline (SO) package with 8 pins.
	SO-14		Small outline (SO) package with 14 pins.
	SO-20		Small outline (SO) package with 20 pins.
	SSOP		Shrink small outline package (SSOP).
	SOIC / SOP		Small outline integrated circuit (SOIC). Small outline package (SOP).
	SOJ		Small outline J-lead (SOJ) is a common form of surface-mount DRAM packaging. It is a rectangular package with J-shaped leads on the two long sides of the device.
	SOT23		SOT23 is a rectangular, surface mounted, small outline transistor (SOT) package with three or more gull wing leads. SOT23 features a very small footprint and is optimized for the highest possible current. Because of its low cost and low profile, SOT23 is used in home appliances, office and industrial equipment, personal computers, printers, and communication equipment.
	SOT89		SOT89 is a plastic, surface mounted, small outline transistor (SOT) package with three leads and a collector pad for good heat transfer. Unlike other packages, SOT89 lead posts are up-set and not down-set. SOT89 is designed for medium power and high-speed switching applications. It is also used in applications that feature very low RDS (on), no secondary breakdown, and direct interface to complementary metal oxide semiconductor (CMOS) and transistor-transistor logic (TTL).
	TO-3		TO-3 is a transistor outline (TO) package with three leads.
	TO-39		TO-39 is a transistor outline (TO) package.
	TO-92		TO-92 is a single in-line, transistor outline (TO) package that is often used for low power devices. One of the oldest power packages, TO-92 is suitable for applications in office and communication equipment.
	TO-220		TO-220 is a transistor outline (TO) package that is suitable for high power, medium current, and fast-switching power devices. TO-220 is used in home appliances, office and industrial equipment, and personal and consumer electronics. A package variant, TO-220 Full Pack, includes a fully encapsulated heat sink that does not require extra hardware for electrical isolation. TO-220 Full Pack has the same footprint as TO-220, provides electrical isolation up to 5 KV, and is often used in motor drive applications and power supplies.
	TO-263		TO-263 is the surface-mount version of the TO-220 package. TO-263 is a transistor outline (TO) package with 2, 3, 5, 6, or 7 leads. TO-263 can accommodate large dice because of its large pad design. It is suitable for high power applications due to its low resistance. Typical applications for TO-263 include home appliances and personal computers.
	Other		Other unlisted, specialized, or proprietary IC package types.
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	Special Features
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	Internal Current Limit		Regulators have an internal circuit to control the amount of current produced.
	Multiple Outputs		Regulators have more than one output (channel).
	Input Overcurrent Protection		Regulators have an internal circuit that protects it when an excessive input current is applied.
	Thermal Shutdown Protection		Regulators have an embedded control circuit that shuts down the device when the temperature exceeds a predefined limit.
	Reverse Voltage Protection		This feature prevents damage to the regulator when the input voltage is reversed. It is essential in applications where a user can accidentally reverse the polarity of the batteries, or make similar mistakes.
	Other		Other unlisted features.
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