Charge Pump Regulators Created for Use in Tablets

Semtech's charge pump regulators are optimised for use in tablets, modems, set-top boxes, smart phones, digital cameras, portable media players and multi-LED backlit LCDs, among other applications. The new 3.3V SC630A and 5V SC632A are said to be the world's smallest 300 and 275mA (respectively) buck-boost regulators, in a 2 x 2 x 0.6mm package, and are designed to be used with ultra-small 2.2uF capacitors, making them smaller and easier to use than conventional, inductor-based buck-boost regulators.

This combination of tiny package and capacitor sizes results in an overall design footprint as small as 10mm2. The SC630A and SC632A are three-mode charge pumps (1x, 1.5x, 2x) with continuous output currents of 300 (SC630A) and 275mA (SC632A). They are designed using Semtech's patented low-noise charge-pump technology to provide low EMI solutions compared with inductive boost regulators. Buck-boost charge pump regulators increase or decrease voltages incoming from the main power source (input voltage) to meet the output voltage needed by the system components.

The SC630A and SC632A are 3.3V and 5V buck-boost charge pump regulators that operate as LDO linear regulators when the input is greater than the 3.3 or 5V respective output voltages. When the input is less than the required output voltages, the devices automatically activate the charge pump to provide voltage boost and the headroom needed for voltage regulation. Both new charge pumps offer a shutdown current of 0.1uA (typical) and full protection features, including internal soft start to minimise inrush current, as well as over-current, short-circuit and over-temperature protection.

The SC630A and SC632A are enhancements to Semtech's SC630 and SC632 buck-boost charge pump regulators. These 'A' version parts offer the same performance as the 'non-A' versions, but in a smaller footprint and with a lower BOM cost. These benefits are achieved via a significant reduction in input and output capacitor size from 22 down to 2.2uF, by increasing the charge-pump frequency to 1MHz and enhancing the dynamic performance of the regulation loop. This reduces the overall design footprint to as small as 10mm2. Both devices come in a low-profile, thermally enhanced 2 x 2 x 0.6mm MLPQ 8-pin package.

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