Analog IC Design with Low-Dropout Regulators (LDOs) by Gabriel Rincon-Mora

By Gabriel Rincon-Mora

Master Analog Integrated-Circuit Design

Design, research, and construct linear low-dropout (LDO) regulator ICs in bipolar, CMOS, and biCMOS semiconductor method applied sciences. This authoritative advisor deals a different emphasis on embedded LDO layout. via intuitive factors and specified illustrations, the booklet exhibits how one can positioned those theories to paintings growing analog ICs for the newest transportable, battery-powered devices.

Analog IC layout with Low-Dropout Regulators info the full product improvement cycle-from defining targets and choosing elements to blueprinting, assembling, and fine-tuning functionality. paintings with semiconductors, hire adverse suggestions, deal with fluctuating a lot, and embed regulators in ICs. additionally, you will tips on how to construct prototypes, practice assessments, and combine system-on-chip (SoC) performance. notice how to:

  • Design, attempt, and gather BJT-, MOSFET-, and JFET-based linear regulators
  • Use present mirrors, buffers, amplifiers, and differential pairs
  • Integrate suggestions loops, detrimental suggestions, and keep watch over limits
  • Maintain an autonomous, reliable, noise-free, and predictable output voltage
  • Compensate for low enter present and vast voltage swings
  • Optimize accuracy, potency, battery existence, and integrity
  • Implement overcurrent defense and thermal-shutdown features
  • Establish energy and working limits utilizing characterization suggestions

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After the circuit has time to react, the pass device responds by supplying load current iLOAD and additional current to charge and slew the output filter capacitors back to their targeted regulated voltage. The regulated output voltage ultimately settles to the voltage corresponding to the new load-current value, which is the ideal voltage minus the load-regulation effect of the loop (ΔVLDR). com) Copyright © 2009 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website.

Microelectronic Devices Microelectronic Devices 57 small for proper intrinsic diode operation, which is why p-type substrates are connected to negative supply rails and n-type to positive supplies. 2 Small-Signal Response AC diode voltage and current signals vd and id refer to small enough variations in diode voltage vD and current iD to constitute only a considerably small fraction of their dc biasing counterparts VD and ID. , slope or first derivative at biasing point ID-VD in Fig. 6c) correlates reasonably well with the actual exponential response.

For example, referring to Fig. 5) R = NRS where N is the total number of squares in a strip of material. , p-doped silicon). For electrical isolation, a dielectric medium is inserted or created between these devices and their common substrate, the latter of which is connected to a low-impedance supply for the purpose of reverse-biasing all junctions in the IC. The end result, as it pertains to the resistor or link, is a parallel-plate capacitor between the entire device and substrate, as shown in Fig.

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