AS1370 datasheet(15/28 Pages) AMSCO

номер детали	AS1370

подробное описание детали	Input voltage from 2.6V to 50V

PDF	28 Pages

Scroll/Zoom	100%

производитель	AMSCO [ams AG]

домашняя страница	http://www.ams.com

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15 / 28 page

ams Datasheet

Page 15

[v2-00] 2016-Jun-01

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AS1370 − Application Information

Efficiency

Low quiescent current and low input-output voltage

differential are important in battery applications amongst

others, as the regulator efficiency is directly related to

quiescent current and dropout voltage. Efficiency is given by:

Efficiency =

Where:

IQ= Quiescent current of LDO measured.

Power Dissipation

The power dissipated by the internal series MOSFET PD(MAX)

(Seriespass) is calculated as:

PD(MAX) (Seriespass) =

[W]

Internal power dissipation PD(MAX) (Bias), result of the quiescent

current required to bias the internal voltage reference and the

error amplifier, is calculated as:

PD(MAX) (Bias) =

[W]

The maximum power dissipation PD(MAX) (Total) of the LDO is

calculated as:

PD(MAX) (Total) = PD(MAX) (Seriespass) + PD(MAX) (Bias) [W]

(EQ2)

OUT

LOAD

()

-------------------------------------------------

100

(EQ3)

IN MAX

() VOUT MIN

()

–

() I

LOAD MAX

()

(EQ4)

IN MAX

()

(EQ5)

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