Spannungsregler mit niedrigem Spannungsverlust und Verfahren zur Regelung der Spannung

Details

Veröffentlichungs-Nr.

EP2781984

Aktenzeichen

EP13160438

Anmeldetag

21. März 2013

Veröffentlichung

2. Dezember 2020

Erteilung

2. Dezember 2020

Rechtsraum

EP

IPC

G05F1/575H03H7/06

Abstract

In one embodiment a low-dropout regulator comprises a first differential amplifier (Nmos1) to receive an input voltage (Vin), a power transistor (T1) coupled to the first differential input pair (Nmos1), the power transistor having an output (OUT) forming an output terminal of the low-dropout regulator to provide an output voltage (Vout) as a function of the input voltage (Vin), a second differential amplifier (Pmos1) coupled to the first differential amplifier (Nmos1), and a switching element (Mncut1, Mncut2) coupled between first and second differential amplifier (Nmos1, Pmos1), said switching element (Mncut1, Mncut2) being operated as a function of a feedback signal (Sfb) derived from the output voltage (Vout). The second differential amplifier (Pmos1) is complementary to the first differential amplifier (Nmos1). The low-dropout regulator is operated in one of two modes such that in a first mode the second differential amplifier (Pmos1) is enabled and in the second mode the first differential amplifier (Nmos1) is enabled and the second differential amplifier (Pmos1) is disabled by means of the switching element (Mncut1, Mncut2).

Anmelder

Firmen

ams AG
AMS AG

Land

🇦🇹 Österreich

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