Abstract

GOMEZ-ORTIZ, Héctor Iván; NEIRA-TRIANA, Carlos Andrés  and  ANGARITA-CEDIEL, Francisco. A fast transient low dropout regulator on 90 nm technology. Iteckne [online]. 2015, vol.12, n.1, pp.76-83. ISSN 1692-1798.

This paper presents the design of a low dropout linear regulator for portable applications. The proposed circuit consists of a simple amplification scheme with a single gain stage plus the power transistor. Moreover, the circuit uses a current mirror to add part of input transconductance to the output, increasing the gain without load current. The simulations performed for the designed circuit in SYNOPSYS for a 90 nm technology show a robust performance to process, voltage and temperature variations with a settling time of 1µs. Also, the frequency response shows the minimum gain of 43 dB and a power supply rejection of -25 dB at 100 KHz. The power consumption without load current was 14 µA and it can deliver a maximum load current of 25 mA.

Keywords : Fast transient response; linear regulator; output capacitor less; robust.

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