Datasheet Linear Technology LT3045EDD-1#PBF — Datenblatt

Hersteller	Linear Technology
Serie	LT3045-1
Artikelnummer	LT3045EDD-1#PBF

20 V, 500 mA, ultraniedriges Rauschen, ultrahoher PSRR-Linearregler mit VIOC-Steuerung

Datenblätter

Vorschau und Herunterladen

PDF, 3.3 Mb, Sprache: en, Datei hochgeladen: Oct 20, 2017, Seiten: 36
20V, 500mA, Ultralow Noise, Ultrahigh PSRR Linear Regulator with VIOC Control

Auszug aus dem Dokument

Preise

Verpackung

Package	3x3 DFN-12
Package Code	DD
Package Index	05-08-1725

Parameter

Demo Boards	DC2593A,DC2637A
Design Tools	LTspice Model
Discrete Pass Element	no
Dropout Voltage	0.26 V
Export Control	no
Features	Ultralow Noise, Ultrahigh PSRR, Current Source Reference, Output Current Monitor, Power Good, Shutdown, VIOC
Ishutdown	0.3 µA
Isupply	2.2 mA
LDO Output Current	0.5 A
Max Junction Temp	150 Deg
Number of Outputs	1
Operating Temperature Range	0 to 85 °C
Output Current	0.5 A
PSRR	76 dB
RMS Noise	0.8 µV
Theta JA	34В°C/W (DD), 33В°C/W (MSE)
Type	PNP
Vin Max	20 V
Vin Min	1.8 V
Vout Max	15 V

Öko-Plan

RoHS

Compliant

Anwendungshinweise

Herunterladen
Measuring 2nV/в€љHz Noise and 120dB Supply Rejection on Linear Regulators &mdash AN159
PDF, 1.1 Mb, Datei veröffentlicht: Feb 2, 2016
Auszug aus dem Dokument
Application Note 159
February, 2016
Measuring 2nV/в€љHz Noise and 120dB Supply Rejection
on Linear Regulators
The Quest for Quiet
Todd Owen and Amit Patel
Introduction MEASURING OUTPUT VOLTAGE NOISE A quiet, well regulated supply is important for optimum
performance with a number of circuit applications. Voltage controlled oscillators (VCOs) and precision voltage
controlled crystal oscillators (VCXOs) respond to small
changes in their supply very quickly. Phase-locked loops
(PLLs) require a stable supply as signal on the supply
translates directly to phase noise in the output. RF amplifiers require quiet supplies as they have little to no ability
to reject supply variations and regulator variation will
appear as unwanted side bands and lower the signal-tonoise ratio. Low noise amplifiers and analog-to-digital
converters (ADCs) do not have infinite supply rejection
and the cleaner the regulator output is, the higher their
performance. These are just a few applications where linear
regulators are required to provide quiet power supply rails,
but how does one ensure that the regulator is performing
as advertised? Being Quiet is Nothing New Once fully built, one can determine if the supply being
used has low enough noise for the application. Oscillator
phase noise is measured and compared against results
achieved with a known good supply, ADCs are checked …

Artikel

Herunterladen
Industry's First 0.8µVRMS Noise LDO Has 79dB Power Supply Rejection Ratio at 1MHz &mdash LT Journal
PDF, 1.1 Mb, Datei veröffentlicht: Apr 7, 2015
Auszug aus dem Dokument
April 2015 I N T H I S I S S U E patent-pending boost-buck
LED driver topology 8 I2C programmable
supervisors with EEPROM
12 Volume 25 Number 1 IndustryвЂ™s First 0.8ВµVRMS Noise
LDO Has 79dB Power Supply
Rejection Ratio at 1MHz
Amit Patel 18V buck-boost converter
with intelligent PowerPath
control delivers >2A 16 advantages of 75W boost
mode LED driver 22 how to design an isolated,
high frequency, push-pull
DC/DC converter 25 When it comes to powering noise-sensitive analog/RF applications,
low dropout (LDO) linear regulators are generally preferred over their
switching counterparts. Low noise LDOs power a wide range of
analog/RF designs, including frequency synthesizers (PLLs/VCOs),
RF mixers and modulators, high speed and high resolution data
converters (ADCs and DACs) and precision sensors. Nevertheless,
these applications have reached capabilities and sensitivities
that are testing the limits of conventional low noise LDOs.
For instance, in many high end VCOs, power supply noise
directly affects the VCO output phase noise (jitter). Moreover,
to meet overall system efficiency requirements, the LDO
usually post-regulates the output of a relatively noisy …

Modellreihe

Serie: LT3045-1 (8)

LT3045EDD-1#PBF LT3045EDD-1#TRPBF LT3045EMSE-1#PBF LT3045EMSE-1#TRPBF LT3045IDD-1#PBF LT3045IDD-1#TRPBF LT3045IMSE-1#PBF LT3045IMSE-1#TRPBF

Herstellerklassifikation

Power Management > LDO Linear Regulators > Positive Linear Regulators (LDO)

Andere Namen:

LT3045EDD-1PBF, LT3045EDD-1 PBF, LT3045EDD1#PBF, LT3045EDD 1#PBF