Novel current limit circuitry for LDOs

Plesa, Cosmin-Sorin; Răducan, Cristian; Dimitriu, B.

doi:10.1109/eurocon.2017.8011109

Cited by 5 publications

(1 citation statement)

References 13 publications

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“…The negative and positive terminals of the comparator connect to a temperature-independent voltage reference and a thermal-dependent circuit, respectively. The thermal-dependent circuit may use a diode-connected bipolar junction transistor whose base-to-emitter voltage is complementary to absolute temperature (CTAT) [19] or a bandgap comparator that includes a proportional-toabsolute-temperature (PTAT) voltage reference [20,21,22]. In addition, GaN-on-Si Schottky Barrier Diodes (SBD) can also provide a PTAT voltage for thermal shutdown function [23].…”

Section: Introductionmentioning

confidence: 99%

A thermal protection circuit for fast battery charging LDOs

Xiao

Zhao

et al. 2022

IEICE Electron. Express

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This paper presents a novel thermal protection circuit for low dropout regulators (LDOs). To avoid thermal damage under high power conditions, the output current of LDOs varies with the sensed load temperature. Both the current delivery capability at a pre-set temperature and the limit slope of load current can be tuned to accommodate different load conditions and temperatures. The proposed design was fabricated with a 0.18 µm CMOS process with a chip area of 0.073 mm2. Chip measurement results show that the proposed design reduces charging time by 18% over the conventional thermal shutdown structure.

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