Buck Regulator Features Controlled Architecture

The LTC3601 is a high-efficiency, 4MHz synchronous buck regulator from Linear Technology that incorporates a controlled frequency, current mode architecture. It can deliver up to 1.5A of continuous output current at output voltages as low as 0.6V from a 3mm x 3mm QFN or a thermally enhanced MSOP-16 package. The LTC3601 operates from an input voltage of 4V to 15V, making it suitable for dual-cell Li-ion applications as well as 12V intermediate bus systems.

Its switching frequency is user programmable from 800kHz to 4MHz, enabling the use of tiny, low-cost capacitors and inductors. The LTC3601 uses internal switches with RDS(ON) of 100mohms and 130mohms to deliver efficiencies as high as 96 per cent. Its control architecture enables it to achieve duty cycles as low as five per cent while maintaining switching frequencies as high as 2.25MHz, which means it can be used for high step-down ratio applications, such as 12Vin to 1.2Vout conversions. Burst Mode operation is used to maximise light load efficiency requiring only 300uA at no load, which is suitable for applications demanding maximum battery run time.

For applications that require the lowest possible noise, the LTC3601 can be configured to run in forced continuous mode, reducing noise and potential RF interference. Additional features include a Power Good voltage monitor, external synchronisation capability and thermal protection. The LTC3601EUD is available in a 3mm x 3mm QFN-16, and the LTC3601MSE is offered in a 16-lead, thermally enhanced MSOP package. Industrial grade versions, the LTC3601IUD and LTC3601IMSE, can operate over the -40C to 125C operating junction temperature range.

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