Regulator For Microprocessor Core Logic Supplies

The LT3029 from Linear Technology is a dual low-noise, low-dropout regulator for microprocessor core logic supplies, tracking/sequence supplies and general purpose voltage conversion. The device has independent inputs and independent shutdown control for each channel. It delivers up to 500mA per channel of continuous output current with a low dropout voltage of 300mV at full load. The LT3029 features an input range of 1.8V to 20V, delivering output voltages as low as 1.215V and up to 19.5V.

The device features ultra-low noise of only 20uVRMS across a wide bandwidth of 10Hz to 100kHz, and offers tracking/sequencing capability. Its full feature set and low quiescent current of 55uA per regulator (operating) and <1uA (in shutdown) is said to make it an ideal choice for battery-powered 'keep alive' systems that require optimum run time. The LT3029 operates with very small, low-cost, ceramic output capacitors, optimising stability and transient response. It is stable with only a 3.3uF output capacitor versus older linear regulators that require between 10uF and 100uF to maintain stability.

These external capacitors can be used without the necessary addition of series resistance (ESR) as is common with many other regulators. Internal protection circuitry includes reverse-battery, no reverse current flow from output to input, current limiting with foldback and thermal shutdown. The thermal shutdown circuitry protects both channels if an overload or fault condition on either channel occurs. The LT3029's compact packages offer thermal resistances equivalent to much larger conventional packages.

The LT3029EMSE, LT3029IMSE, LT3029EDE and LT3029IDE are available from stock in a proprietary 16-lead thermally enhanced MSOP package and a 16-lead 4 x 3mm DFN package, with operating junction temperature of -40C to +125C. The LT3029HMSE and LT3029MPMSE are available and offered in the MSOP package with extended operating junction temperatures of -40C to +150C and -55C to +125C, respectively.

Comments

Post a Comment

Popular posts from this blog

What is Class I Division 2?

Image
A Class I Division 2 is a location: (1) In which volatile flammable gases, flammable liquid-produced vapors, or combustible liquid-produced vapors are handled, processed, or used, but in which the liquids, vapors, or gases will normally be confined within closed containers or closed systems from which they can escape only in case of accidental rupture or breakdown of such containers or systems or in case of abnormal operation of equipment, or (2) In which ignitable concentrations of flammable gases, flammable liquid-produced vapors, or combustible liquid-produced vapors are normally prevented by positive mechanical ventilation, and which might become hazardous through failure or abnormal operation of the ventilating equipment. Class I Division 2 Classification Class I Division 2 refers to the ANSI/ISA 12.12.01 standard. This standard was previously UL1604 until UL recommended the newer ANSI/ISA standard be used and that all hazardous location products be certified under this standa
Read more

FUSE SIZING CONSIDERATIONS FOR HIGHER EFFICIENCY MOTORS

Image
When selecting the proper fuse for short circuit protection in motor starting applications, it is important to not only ensure that the fuse will not nuisance open during motor start up times, but also that the fuse will coordinate as required with overload relays. When sizing fuses between 125% and 150% of the motor nameplate current, several advantages, including ease of coordination with an overload device, a smaller disconnect, and increased short circuit protection from a lower fuse rating, can be achieved. However, if sizing at this level prevents the motor from starting, it may then be necessary to increase the fuse ampere rating and it then becomes important to know the NEC sizing limitations. As of June 1, 2016, the US Department of Energy has mandated that newly manufactured electric motors will need to meet NEMA Premium® efficiency standards. As motor efficiencies increase, motor locked rotor currents can also be expected to increase. In addition to this, with across-the-lin
Read more

7/8 16UN Connectors that Provide 600 Volts and 15 Amps

TURCK announces new A-Size 3 and 4-pin 7/8 16UN powerfast™ connectors that provide up to 600 Volts and 15 Amps of power. These IP67 rated connectors provide a modular wiring system designed to handle high current applications for machine power distribution, while providing resistance to vibration commonly associated with conveyors, motors and material handling applications. The cordsets are available with a tray rated, exposed run PVC flexlife ® cable, with or without STOOW rating, and 14 AWG wires that allow you to replace hard wiring with a robust, quick disconnect system that saves the time and money spent installing a conduit system. The A-Size powerfast line offers male and female, straight connectors, standard and custom lengths, and pigtails or extensions. To make the system complete, fully encapsulated mating receptacles, with 1/2”-14 NPT mounting threads are available.
Read more