Microelectronics

Analog Circuit Design Volume Three: Design Note Collection by Bob Dobkin, John Hamburger

By Bob Dobkin, John Hamburger

Design notice Collection, the 3rd ebook within the Analog Circuit Design series, is a accomplished quantity of utilized circuit layout options, delivering stylish and sensible layout suggestions. layout Notes during this quantity are targeted circuit motives, simply utilized on your personal designs. This e-book comprises an in depth strength administration part, overlaying switching regulator layout, linear regulator layout, microprocessor energy layout, battery administration, powering LED lighting fixtures, car and business strength layout. different sections span a number of analog layout subject matters, together with facts conversion, facts acquisition, communications interface layout, operational amplifier layout concepts, filter out layout, and instant, RF, communications and community layout. no matter what your software -industrial, scientific, protection, embedded structures, instrumentation, automobile, communications infrastructure, satellite tv for pc and radar, pcs or networking; this ebook will offer sensible layout thoughts, constructed via specialists for tackling the demanding situations of energy administration, facts conversion, sign conditioning and wireless/RF analog circuit design.

  • A wealthy selection of utilized analog circuit layout suggestions to be used on your personal designs.
  • Each layout observe is gifted in a concise, two-page structure, making it effortless to learn and assimilate.
  • Contributions from the best lighting in analog layout, together with Bob Dobkin, Jim Williams, George Erdi and Carl Nelson, between others.
  • Extensive sections masking strength administration, information conversion, sign conditioning, and wireless/RF.

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The LTC1709-7 also features discontinuous conduction mode and Burst Mode operation to minimize power losses when the CPU is in “sleep” mode. Because current is divided equally between two identical channels, heat is distributed uniformly and long-term PCB reliability is improved. 1 shows the schematic diagram of a 25A mobile CPU core power supply. 6V/25A output. Greater than 80% efficiency can be maintained throughout the load range from 5A to 25A. 2 shows the measured load transient waveform. The load current changes between 0A and 25A.

2. 1 operates at 300kHz, utilizes only off-the-shelf components, fits into an eighth brick footprint area and has a bill of materials cost which is less than half of an equivalent power module. Due to current mode operation, a fast feedback loop, and programmable current slope compensation, the converter uses ceramic output capacitors to achieve excellent transient response characteristics while requiring the smallest amount of output capacitance. Ceramic capacitors also ensure high reliability.

The sense voltage is translated into a power stage input current by the LTC3883’s 16-bit internal ADC. In addition, an internal IC sense resistor senses the chip’s supply current at VIN, so it can provide both the chip and the power stage’s input current measurements. Inductor DCR autocalibration The problem with conventional inductor DCR current sensing is that the tolerance of the DCR can be as large as ±10%, greatly limiting the current read back accuracy. To solve this With this autocalibration method, the output current read back accuracy is within 3% regardless of inductor DCR ­tolerance.

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